- Details
The technical sessions will showcase the latest technological advances. Whether you're a blaster in the field or a supervisor, you'll find this an informative, enjoyable event. The following is a preliminary list of papers which will be presented in San Antonio, Texas. This program is subject to change.
A Characterization of Gas Explosion Shockwaves for Boiler and HRSG Cleaning Applications
The purpose of this work is to experimentally measure the blast parameters of the pressure-wave technology to understand the performance and effectiveness of the process, characterize the technology for detonation and shockwave physics, and to conduct metallographic analysis of boiler tubes for potential damage during the cleaning process.
A Near-Field Ground Vibration Model for Estimation of Threshold Level of PPV for Backbreak in Surface Blasting
Backbreak is an extremely frequent phenomenon associated with blasting. The study’s focus is to predict the damages associated with blasting by the newly developed near-field, blast-induced ground vibration prediction model and also the performance of the model is evaluated for a case study.
A Successful Blasting Project near a Commercial Building
An area of 300 ft x 100 ft with 10 ft deep, adjacent to an existing commercial building was successfully excavated. The rock present at the site was gypsum layers within hard shale. The vibration levels produced from blast events were in compliance with the blasting standards.
Additive Manufacturing of Liners for Conical Shaped Charges: Practicality and Performance
Additive Manufacturing is utilized to create a series of liners with varying characteristics to test performance metrics such as depth of penetration and jet velocity of conical shaped charges. Charges were filled with the explosive C-4 and recorded with high speed video analysis.
Additively Manufactured High Explosive Driven Plane Wave Generator
An investigation into the effectiveness of fully 3D printing both the explosive and inert component of an explosive lens type of plane wave generator.
Algorithms for Adaptive Solutions: Essential Tools for Operational Blast Optimization
Algorithms using field measurements as input information can optimize drill and blast design in open pit operations. They allow designing blasts in a much quicker way than traditional "trial and error" methods and thus are essential operational tools. Examples, combining design algorithms with measurement and drilling equipment, will be shown.
An Investigation into Variations in Blast Induced Ground Vibration with the Precision in Blast Initiation System
Blasts were conducted in a surface mine with different initiation systems and the peak particle velocities (PPV) were recorded at different distances using seismographs. Data collected for each initiation system were analyzed using scaled distance regression approach individually to understand the overlapping of the hole and actual charge per delay.
Analysis of Particle Size Distribution with Image J Programme
In this study, blasting operations efficiency was investigated in an open pit mine in Turkey. In investigation, Image J programme was used for the image processing method.
Application of ArcGIS Pro in Blast-Induced Ground Vibration Analysis in an Open Pit Copper Mine
It was observed that the ArcGIS is a great tool in finding blasting area centers, identifying structure boundaries, and visualizing blasting vibration results. This will help in controlling the blast-induced ground vibrations from the subsequent production blasts at this mine site.
Are Electronic Initiation Systems the Unique Answer to Solve Blasting Issues?
The use of electronic initiation systems goes further than a pure technology decision. Additionally, to a well-developed and reliable system, it is necessary to count with tools to calculate suitable timing and an economic criterium to take final decision of implementation. Real examples of application help to understand the analysis.
Auditing Underground Development Drilling and Blasting
Outline of a process for auditing drilling and blasting procedures for underground development; room and pillar; stoping; or tunneling.
Benchmarking Drill and Blast Compliance to Design, A Case Study
Case study presenting the roll out across the open pit operations, detailing the incremental benefits seen from an integrated and standardised approach. Operational benchmarking results are presented with improvements demonstrated in safety reporting statistics, blast result output stability, reduction of variation in design execution compliance and cost saving opportunities.
Blast Design Optimization Through Variable Stemming
This paper presents an optimization study of an open stope blast design, named 255-12825, from Vazantes' Mine, located in the state of Minas Gerais, Brazil. Based on the method of variable stemming, the powder factor and explosive consumption were reduced by improving the quality of the muckpile fragments.
Blast Modeling for Facility Security Management
Security engineering in similar to other engineering - the design is guided by the loads, materials and desired function. For facility design, the load is the threat. Blast modeling is an engineering tool that can reverse-engineer facility limits and be a tool for modifying security design for new conditions.
Blast Pattern Expansion: A Heuristic Approach
Rock blasting is one of the first processes in the stage of rock fragmentation and plays a fundamental role in the following stages. The authors developed a simulated annealing heuristic-based model to try to find the optimum blast KPIs (stemming, subdrilling, burden and spacin) that minimize the costs of blasting.
Blast Spillover Control
Changing blasting practices to reduce blast spillover to allow for the successful mining of Rio Tinto's Bingham Canyon Mine's South Wall Push Back.
Borehole Deviation Control Using Electronics: An Euler's Approach
The consequences of rock blasting with explosives are directly related to the accuracy of drilling. The main idea behind this paper is to validate the power of the Euler method, together with an accelerometer and a microcontroller, in order to reproduce of the hole shape.
Burden Profiling: Do You Measure What You Think You Do?
This study shows the difference between laser profiling, drone and using a burden pole. It demonstrates the difference between how each of the above systems also demonstrates how they produce different results. Burden pole and laser give you only 2D burden, but the drone gives you a 3D minimal burden.
Case Study of a Subhorizontal Mining Method with Longhole Drilling in a Narrow Vein Orebody - Cuiaba Mine (Brazil)
This paper describes the application of a new narrow vein mining method in the Cuiaba mine in Brazil. The method was applied at the Galinheiro orebody with several changes in the mine pattern such as mesh, blasting changes, having its results measured on holes deviation, seismographic data and void scanning.
Challenges Related to Near-Field Blasting between Critical Interstate and Railroad Infrastructure
Many technical challenges were encountered while conducting near-field construction blasting between the critical intersection of Interstate 10 and the multiple active railroad tracks in El Paso, Texas, for the Loop 375 Border Highway Project. The andesite bedrock was successfully blasted and excavated, providing site conditions conducive for construction.
Characterizing the Detonation and Blast Wave Characteristics from Commercial Detonating Cord
Detonating cord includes inert jacketing materials which are usually neglected when studying the detonation and blast wave characteristics. Some experimental evidence indicates that the afterburning from these materials can modify the net energy release. This research is aimed to characterize commercial detonation cord using high-speed imaging and piezoelectric sensors.
Customized Mine Blasting for Leaching
This work is about having a fragmentation size for a leaching process without crushing in gold mines, having as an improved metallurgical recovery results, with a global low mine cost.
Debris Collection Efforts Following a Large-Scale AN Detonation
Following a large-scale AN detonation, a debris collection project was conducted to aid in underpinning algorithms used in a Quantitative Risk Assessment tool. This paper details the collection efforts, challenges and lessons learned. This paper also presents some of the initial findings relating to the debris distribution.
Delineating Extent of Cracks in Post-Blast Rock Surface Using the GPR - A Case Study
Delineation of extent of post-blast wall crack is important. Blast-induced damage is qualitatively estimated by using geo-physical tools. Considering damage is a result of threshold levels of vibration, vibration based damage models are prepared. GPR is used as damage measuring tool and near-field vibration analysis is done through numerical modeling.
Detonator Safety Relation to Measurement Errors
We will discuss the kind of procedure that we use to predict the no-fire (for safety) and all-fire (for reliability) stimulus levels for any given type of electro explosive device. The basic idea is to expose a number of explosive devices to different levels of stimulus, so we can estimate the probability of firing as a function of stimulus level. We call this a statistical firing test. But what about the uncertainty in measuring the stimulus? Suppose we are not quite sure what stimulus level we apply? This is the particular question that we will consider today. This relates to both safety and reliability. Surprisingly enough, we will find that some uncertainty in measuring the levels during our statistical firing test actually improves our long-term safety and reliability.
Diameter-Effect Modelling in Unconfined Steady Non-Ideal Detonations
An engineering approach to two-dimensional, unconfined, non-ideal detonation is proposed based on the elliptical construction of the shock locus, combining the axial cylindrical stick Q1D solution with some additional limiting condition to determine the sonic edge of the charge.
Drill and Blast Digitalization
Pueblo Viejo is an open pit gold mine which is always looking to implement the newest technology in the industry to improve all processes. Focusing on the pillar of our company, digitalization, we've been looking for the technologies that allow us the automation of data generation and process innovation.
E7B Sector Drilling and Blasting Challenges and Learnings
The Bingham Canyon Mine implementation of frequency control blasting and use of geotechnical radar monitoring to mine a narrow ore layback in a challenging geotechnical section of the pit.
Effect of Blast Induced Rock Fragmentation and Muck Pile Angle on Excavator Performance in Surface Mines
The results from this study indicate that the optimum fragmentation and relatively loosely packed material wtih moderate angle of repose of the muck pile will significantly reduce the loading time thereby increasing the excavator's productivity.
Effect of Geology and Mechanical Properties of Rock on Blast Results
Contrary to general belief, when it comes to blasting, the geological name of the rock does not allow deciding the values of the blast parameters. It is the rock's mechanical properties Y, s, d and Sc that are used in calculations with fundamental equations that allow predicting blast results.
Effects of Aggregate Production Blasting on an Adjacent 42" (1.067m) Pipeline
This paper will explore the effects of aggregate production blasting on a 42" steel pipeline. Strain gauges were installed on the pipeline during construction. As blasting progressed close to the pipeline, strains on the pipeline were recorded. Seismograph information was also recorded. Blasting techniques were varied to enhance learning.
Electronic Blast Initiation - The Evolving Perception of Australian Mining Operations
The perception of electronic blast initiation systems is changing in Australia, with a leading global mining company recently committing to electronic initiation across its entire iron ore operation. This paper discusses various benefits of electronic initiation, the implementation of electronics across the business and challenges overcome along the way.
Epic Blast of 275 US Ton (250 Tonnes) Sets Benchmark in Opencast Mining Arena in Environmental Sensitive Area With Desired Fragmentation and Muck Profile
Study of epic blast of 250 ton, having 160 mm drilled diameter and 1074 no of holes for excavation results better fragmentation within control vibration level. This blast is unique in the sense that the entire array of preparatory activities had been successfully and impeccably executed within the same day.
Evaluating Effect of Text Message Prompts on Miners' Decision Making in Disasters
Determine if information provided to miners during emergencies will help individual miners make safer decisions. Presented with real-life scenarios of emergency and urgent situations during a disaster in addition to text message options, research provides response patterns for endangered workers in emergency situations used to make underground-mining safer for miners.
Evaluation of Accuracy When Measuring Blast Fume Emission Concentrations Using a UAS
A gas monitor attached to a UAS may be capable of measuring blast fume concentrations at surface mines. Rotor downwash will artificially disturb the blast cloud, causing inaccuracies in measured concentration values. This paper discusses a factor for adjusting UAS-measured concentrations to accommodate downwash interference.
Excavation of a Tunnel to Reach a Large Underground Cavern Roof Fall
Deals with excavation of a tunnel by D&B to approach a major fall in the down stream surge chamber of a 1200 MW u/g hydel project. The excavated tunnel has enabled the access to the cavern/fall from the north wall of DSC and paved the way for cavity stabilization.
Experimental Characterization of Additive-Manufactured Energetic Materials with Advanced Density Gradient Mesostructure
This research investigates the relationship between 3D-printed internal mesostructures of energetic materials and resultant deflagration profiles. These studies further validate the application of additive manufacturing technologies to the development of functionally-graded energetic materials.
Explosives Charge Sequence and Vibrations
This paper looks at the influences of explosives charge sequence on blast vibrations. The hole to hole timing is kept constant while the order of the charges is changed.
Facility Enhancement for Coal-Methane Explosion Research
The abstract looks at the drilling pattern, blasting and fragmentation to develop a methane coal dust explosion facility.
Florida Mining Blast Vibration Study Part 1: Do RI8507 Vibration Limits Apply in Florida?
This document, part 1 of 4, provides a summary of the USBM's research used to develop the vibration limits defined in RI 8507 and whether those limits apply to Florida.
Florida Mining Blast Vibration Study Part 2: Current Regulations in Florida
This document, part 2 of 4, provides a review of current blast vibration regulations in Florida.
Florida Mining Blast Vibration Study Part 3: Data and Analysis Review
This document, part 3 of 4, provides a review of blast vibration data collected in Florida and whether or not the USBM RI 8507 blast vibration limits are applicable to Florida.
Florida Mining Blast Vibration Study Part 4: Conclusions and Recommendations
This document, part 4 of 4, provides a review of conclusions and recommendations produced by the authors.
Fragmentation Driven Continuous Improvement Process
The paper will introduce the tools, the methodology of turning the data into information and then knowledge, placing the information in the correct location in the process, assigning the information the correct weight (creating a balanced SA) identifying opportunities for improvement, the decision logic and the CI loop.
Hemispherical Charge Comparison to Kingery-Bulmash
The report compares the observed blast parameters from a test series of hemispherical Composition C-4 surface detonations with the predicted blast parameters from the Kingery-Bulmash Blast Parameter Calculator. Differences between the experimental and predicted values are reconciled through analysis and discussion of testing conditions, instrumentation setup and scaling methods.
High-Order Numerical Methods and Reaction Rate Law for Non-Ideal Detonation Modeling
This research work introduces a new reaction rate law for modeling the chemical energy release from ANFO and demonstrates the ability of high-order shock capturing methods to simulate the complex hydrodynamics in non-ideal condensed-phase explosives.
High-Speed Camera Spectral Response to the Fireball Spectra During the Detonation of High Explosives
This paper examines how bandpass and neutral density filters can be used to prevent overexposure of a camera's sensor from electromagnetic radiation, in the visible light spectra, emitted by the detonation of high explosives.
Impact of Blasting on Downstream Process to Maximize the Profitability of Mining Industries
The goal of any business is to seek the maximum profitability for the organization through optimization, the use of resouces, processes and the application of new technologies. An analysis of various case studies demonstrate that blasting can have positive impacts on the crushing and milling processes resulting in increased profitability.
Improving Productivity in Pillar Blasting - HZL, Sindeswar Khurd Mine
This paper presents the blast design and charging technical challenges that were solved to bring about the successful firing of the pillar using up-hole charging technology of hose-pusher and up-hole retention bulk emulsion explosives with electronic blasting systems to break ~ 450,000 MT of ore.
Increase in Production and Dilution Control in Narrow Vein Ore Bodies
This study will refer to the optimization of production stope blasts, focusing mainly on dilution control and the improvement of operational efficiency by increasing blast sizes with the implementation of electronic detonators. The study has a technical focus, applied in conjunction with the best practices and technologies of the industry.
Increased Strength Electronic Detonator Downlines for Managing Difficult Blasting Conditions in Coal Mines
This paper details the introduction of an increased strength downhole wire at a coal mine in central Queensland, Australia, including the individual factors that needed to be considered and the results of the initial trial blasts.
Influence of Sample Rate on Underwater Blast Pressure Measurements
The selection of sample rate during underwater blast pressure measurements greatly affects the ability to establish the peak pressure. Small- and large-scaled underwater blasts were used to determine minimum sample rate as a function of cube-root scaled distance during pier demolitions, rock excavation and single-point open-water detonations.
Innovative Blasting to Improve Mining Processes at Middlemount Coal, Australia
The objective of this paper is to holistically approach all aspects of a coal mining operation and systematically improve each underperforming activity. Once improvements were realized innovative blasting techniques, such as Double Cast combined with through-seam blasting within a blast, could then be implemented to reduce the cost of the operation.
Innovative Online Technology Enabling Optimization in Blasting Operations
Intelligent planning and on-going analytics are required to mitigate variability and convert blasting into a predictable outcome by use of technology. Details of a software tool that utilizes historical site-specific blast data to suggest appropriate changes and optimize blast designs on an on-going basis including a case study.
Investigation of Shock Propagation in Air from Sheet Explosive
The geometry of an explosive is known to have a fundamental effect on the resulting shock propagation. The goal of this research is to understand the overpressure characteristics from a sheet explosive, a geometry often utilized for breeching in the military.
Investigation of the Effects of Ground Engineering Parameters on Blast-Induced Vibrations
In this study, the variation of explosion-induced vibrations according to engineering parameters was investigated in subway construction. Uniaxial compressive strength (UCS), rock quality designation (RQD) and young module were used as engineering properties. Vibration values and engineering parameters were investigated by statistical methods.
Large Scale Measurement of Velocity of Detonation
This paper examines the application of novel measurement techniques to evaluate explosive performance across the whole blast. The approach has the potential to provide VOD and timing information across a complete blast rather than individual holes. Field examples are shared.
Risk Management in Blasting: Lessons Learned the Hard Way
Learning from past mistakes or accidents in blasting operations is much preferable to the alternative. This paper reviews past mistakes in safety and risk management that created serious repercussions for the involved parties, and recommends methods and protocols to manage the risks involved.
Logistical Processes in the Explosives Industry using Examples from Daily Work
Special requirements for logistics in the explosives industry. Presentation of the efficiency, security and productivity-enhancing effects based on three practical examples out of the daily work.
Methane-Air Mixture Air-Blast Approximated Using Detonating Cord in Rock Dust Dispersibility Studies
Two curtains of PETN detonating cord with 27 and 24 m, or 43 and 27 m, or 55 and 37 m generate air-blasts in 40 tests, which show consistent wind-speeds of 33 to 52 m/s and similar duration to methane-air mixtures igniting.
Mitigating Post Blast Fume Using Density Modified Explosives
The efficacy of a variable density augered bulk product is presented, with specific reference to mitigating post blast fume. The density of the water resistant product ranges from 0.85 - 1.2 and can be matched to the dry product density which is discussed.
VOD and Initiation Effects on Blast Vibration PPV Using Nonlinear Charge Weight Scaling and Variable Time-Window for Charge Elements
A blast vibration model simulates effects of blast design parameters on the vibration peak particle velocity (PPV) from multiple blastholes at a given point of interest in the rock. The VoD initiation points, explosive type, charge decoupling and decking in each blasthole are simulated along with other design parameters.
Modern Techniques for Blast Design - Going Above and Beyond Powder Factor
This paper will discuss the modern design of blast rounds that go beyond powder factor and simply 'rule of thumb' multipliers for blast design. These new methods will discuss how the blast design changes with geology, structure and the dimensions of the blast.
New Development of Gassed Emulsion Explosive for Cost Optimization and Environmental Control
This paper is focused on designing a new gassed emulsion explosive to get improving VOD and energy release in addition to reduction/mitigation nitrous gas thus optimizing, blasting costs and significant environmental control. On-going tests performed showed excellent results on the rock fragmentation, which allows for expansion of drilling patterns.
OPEX Improvement from Migrating to GPS Guidance and Digital Drill Patterns
Studies conducted at several mine sites looked at quality of fragmentation and at drill and blast KPIs. This impacts explosives and drill tool cost, digging payload tonnes, cycle times, haulage payload tonnes, time to load a truck and the average number of passes to load the truck.
Optimize Fragmentation with Shovel-Mounted Image Analysis Systems
This paper takes the reader back to the basics by discussing the use of real-time fragmentation analysis at the muck pile as an important paramenter to optimise energy factors required for each blast.
Presplit Assessment by Signature Hole Blast Vibration with Accelerometer Measurement
Although with limited tests, it is impossible to identify the optimum presplit design. This paper presents a new method to measure the effectiveness of presplit blasting and investigates four presplit designs at a site by measuring blast vibrations using accelerometers.
Improved Drilling Accuracy Results in Reduced Ore Dilution at Evolution, Cracow
Tests conducted over six months in an underground narrow vein gold mine with permanently mounted gyro compass to production drill boom. Delivered estimated reduction of 5% ore dilution eliminating 25,000 tonnes of waste material on average will reduce operating costs by circa AUD2.5 million per annum.
Proposal and Development of a Continuous Convergence Monitoring System for Underground Environments
The new system presents a method for the measurement of vibrations and rock displacement in underground environments. The system is based on the use of an optical displacement sensor and a geophone connected to a data acquisition system in order to allow real-time convergence monitoring.
Reactivity and Spontaneous Detonation
This paper explains the mechanism of reactivity, the cause of spontaneous detonation and how inhibited explosives prevent the reaction. The paper also presents studies on the effect of sampling and PH on reactivity.
Risk Criteria for Quantitative Risk Assessment
Quantitative Risk Assessment (QRA) can be specifically tailored for use by the commercial explosives industry to calculate risk to employees and the public from commercial explosives facilities and operations. This paper also discusses acceptable risk criteria for this assessment methodology.
Seed Wave Modeling to Natural Caves Protection in Mining Operations
Introduction/ Site Characterization/ Study Case/ Methodology/ Results/ Conclusions.
Seismic Analysis of Vibration Induced by Rock Blasting in Underground Mining
KEY WORDS: Vibration, Seismic, Geophone, Blasting, PPV, Attenuation Curve, Damage Model, Underground Mining.
Small-Scale Testing of Coal Dust Explosion Propagation
A small-scale model was developed to study the flame front and pressure wave propagation of coal dust explosions. This paper focuses on their characteristics as they encounter corners and crosscuts. This testing will help determine proper sensor and suppressant release locations for active explosion barriers in underground coal mines.
Strain Based Vibration Criteria for Blasting New York City
A new code is being implemented for NYC. This code provides an allowance on the US Bureau of Mines criteria and includes strain-based limits to structure response. The new rule includes provisions for seismograph operator licensing and blasters certification.
Study on Blasting Demolition Vibration of Building with Full Shear Wall Structure
Collapse vibration; Vibration velocity; Dominant frequency; Signal energy.
Sustainable Blasting Strategies for Long-Term Mining Projects
This paper explores the sustainable use of the explosive's energy for rock blasting and its role on the performance of downstream unit operations in mining applications. A special case study from an important gold mine in South America is presented.
Systematic Improvement of Drilling and Blasting Practices
On-going yearly reviews have helped drive change in blasting practices at metal and coal mines that has generated significant value for the mining company. Partnership with a blasting consultant has provided both the basis for the reviews as well as relevant technical training and support for implementing recommendations.
The Impacts of Delay Sequence on Fragmentation
This paper includes preliminary results of full scale tests at a limestone quarry designed to evaluate the influence of the charge sequence on the fragmentation results when this variable is drastically changed.
The Once in a Lifetime Project
The project referenced was created by a family pipe dream of the father to the current owners of Luray Caverns. Two sons were willing to have confidence in the team put together to do this tunnel entrance in hopes it would open the cavern to more people.
The Use of Blast Modeling Software for Educational Purposes
A blasting assessment software package was donated to the South Dakota School of Mines and Technology. This software was used by the students to help learn about explosives engineering. This is applicable to professionals in the field as a learning aid.
Track and Trace (T&T) of Regulated Material
Traceability or T & T is a growing need for all types of products, especially for the explosives market, whose products can be used for other purposes. This document aims to bring to the market the T & T process already used in several countries, making a rich contribution.
Transforming Underground Blasting Operations into Primary Crushing Operations
The development of an innovative blasting technique that uses a unit charge and stress reflection method to design underground blasting patterns with the objective of transforming underground blasting operations into primary crushing operations.
Underground Mining Method Enhancements made Possible with Orica's Wireless, Through the Earth Initiation System, WebGen 100
Orica's wireless, through the earth initiation system, WebGenTM 100 provides the underground blasting engineer with unparalleled flexibility to extract the ore in ways that were not conceivable before.
Illumination of Contributing Parameters of Uneven Break in Narrow Vein Mine
-Demonstrate the importance of uneven break (UB) management.
- Illuminate the contribution of UB causative parameters to UB phenomenon
- Analyse the parameter contributions and found trends of UB with UB causative parameters
Using Artificial Intelligence and 3D Imaging for Real-time Fragmentation Analysis on Conveyor Belts
Mine to mill optimization begins with a clear understanding and assessment of blasting, crushing and grinding operations. Modification of blasting practices to optimize feed size is an initial step to increasing throughput. Process optimization and utilization of downstream equipment requires fragmentation measurements at critical points along the size reduction circuit.
Using Digital Electronic Detonator of Blasting LS and LDT Buildings
The digital electronic detonator has the characteristics of flexible delay time setting and high delay precision etc., which guarantees the damage of the frame shear structure building at blasting cut well. Not only improve the collapse effect of the building, but also enhance intrinsic safety of blasting operation.
Using Shock Front Velocities to Compare the Radial Distribution of Detonation Energy for Different Charge Geometries
This report uses time of arrival at a known distance to calculate shock front velocity at different orientations. The shock front velocity vs. orientation is used to compare the shock front energy distribution for prismatic charges with different cross-sectional shapes.
Using Numerical Model as Tool to Predict the Stability Behavior of a Stope at Vazante Mine
This paper presents a study of case of a stope under poor geotechnical stability, in which mine planning strategy had to be modified, supported by numerical modelling, by changing the mine's usual mining method, equipment selection and drill and blast design.
Vertical Attenuation of Blast Vibrations
A vertical array of borehole geophones was deployed to 40 ft near a water pipeline at a blasting project in Phoenix, Ariz. PPV reduction at depth was significant, 31% of the surface PPV at -40 ft and a multi-variable PPV prediction model was made based on scaled range and depth.
What Schools and Universities Need To Do Proactively to Prevent Violence. Explosives - The Untold Story
School violence is a public safety issue. Our research concludes schools and universities must utilize threat and risk assessments proactively to help prevent explosives attacks. Property damage, threats a school with outdated architectural codes poses, jihadists and legal liability are all topics we examine in this paper.
- Details
The technical sessions will showcase the latest technological advances. Whether you're a blaster in the field or a supervisor, you'll find this an informative, enjoyable event. The following is a preliminary list of papers which will be presented in Denver, Colo. This program is subject to change.
New: Spanish translation services now available for all technical sessions on Monday and Tuesday.
Accidental Activation of an Emergency Rocket Flare and Evaluation of Ignition Mechanism Designs
We describe an engineering investigation of an accident involving a rocket parachute flare, and examine the various mechanisms by which these emergency signaling devices are ignited.
A Method to Measure Detonation Front Curvature of Emulsion Explosives
This paper suggest a method measure the detonation front curvature and the velocity of detonation of explosives. The purpose for this is to increase the understanding of the detonation properties of emulsion explosives as used in many blasting operations around the world.
A Practical Guide for the Blasting of Armour Stone or Riprap
Industry best practice guidelines for the blasting of riprap or armour stone.
AN Railcar Derailed Debris Collection – Data Analysis Update
A complete data analysis was completed on test data collected from an AN Railcar detonation. The analysis included an assessment of both the debris data and airblast data resulting from the test. This paper is meant to serve as a summary of the analysis and findings from the debris collection.
Analysis of Sympathetic Detonation in Detonating Cord
Application of Geostatistical Tools in Measurement While Drilling to Assess Geotechnical Rock Conditions in Sublevel Caving
Development of a geotechnical rock condition block model and a predicting risk of blasthole collapse model with reference to MWD records and application of geoestatistical tools to estimate values in all the points of the studied domain and not only in the sampled points.
Assessment of Post-Blast Damage Zones in Tunneling Operations Through MWD and Machine Learning
The overbreak of the remaining rock mass in tunnel blasting has been analyzed in the light of MWD records, with the purpose of developing a prediction model of over- and under-excavation depths from blasting.
Attracting and Engaging the New Generations: An ISEE Student Chapter Case Study
How do the extractive and construction industries gain the interest of the younger generations and integrate them into the industry? The Virginia Tech Student Chapter of the International Society of Explosives Engineers handled this issue in recruitment efforts and event planning from 2017-2019.
Bingham Canyon Mine-Blasting Through and Next to Active Underground
The implementation of blasting practices and designs to collapse sections of an active underground while maintaining vibration limits below levels to protect workings that remain in use.
Blast Optimization Using Both the Multiple Blasthole Fragmentation (MBF) and Multiple Seed Waveforms (MSW) Models at an Open Pit Metal Mine
A blast optimization project was carried out at an Open Pit Mine in the USA using the MBF Model and the MSW blast vibration model. The MBF and MSW are each an integral part of the blast optimization tool. Various scenarios using different explosives, hole delays, blast patterns were modeled.
Blasting Mitigation Measures Used to Control a Highwall Failure Risk
Blasting mitigation measures were used to control a highwall failure risk. This consisted in optimizing the blasting parameters which would not induce the highwall failure and in evaluating the rock mass response to blasting by using radar. The risk management plan was successful because blasting didn't induce highwall failure.
Calculating Shock Wave Overpressure from High-Speed Video
The velocity of a shock wave can be calculated by dividing the change in position of the shock front between two images by the elapsed time between the images. The velocity of the shock wave can be used to calculate other physical parameters of the blast wave such as overpressure.
Case Study: Systematically Improving Drilling and Blasting Operations in Hard Rock Mines
A well-executed and maintained drilling and blasting operation can have a major positive impact on the overall success of such operations. This presentation is a case study on implementing a new drill and blast engineering position and systematically improving the drilling and blasting operations at a surface metal mine.
Changing the Landscape of Surface Mining through Fully Wireless Initiation Systems
The purpose of this paper is to outline the specific learnings associated with the wireless electronic blasting system’s use in surface mining to date. This includes references to specific case studies performed at three open cut operations, challenges with implementation of the technology, benefits realized, and applications for the future.
Comparison of Ground Vibrations vs. Frequencies to Strain Rates from Blasting Operations at the Tennessee Capitol Corridor in Nashville, Tenn.
The Tennessee Capitol Corridor connects the Cordell Hull Building to the State Capitol in Nashville. To construct this connection, two existing elevator shafts and a new stairwell were extended. A pedestrian tunnel was built using blasting techniques to connect to the Cordell Hull Building. Extensive monitoring was required during construction.
Controlled Blasting for Grasberg Slope Optimization
"Mine" implemented a quality driven Slope Optimization program for final pushback, with the goal to safely increase recoverable metals through steeper slopes, while utilizing existing infrastructure and equipment. Although many groups contributed to the success of Slope Optimization, this paper emphasizes controlled blasting initiatives, monitoring, and as-built slope measurement tracking.
Controlling Air Blast with Drone 3D Profiling
This case study addresses the benefits of utilizing drone 3D profiling to capture and model challenging geology to control high air blast. 3D modeling and profiling by drone is the solution to understanding unbiased face profiles and real minimum burdens.
Cross-Hole Seismic Measurement of Blast Induced Rock Mass Quality Change: A Review
Establishing a measurable and repeatable methodology for describing a causal model of rock mass damage or degradation due to physical blasting impacts is a valuable capability for both blasting and geomechanical disciplines. The paper reviews unpublished work that explores the application of crosshole seismic scanning to this end.
Detection of Geological Features using Aerial Image Analysis and Machine Learning
This papers aims at detecting geological features in a bench using aerial image analysis and machine learning.
Determination of Blast Vibration Limits by Direct Strain Measurement
The establishment of structural blast vibration limits based on the strength of the structure, the stress induced by blasting, and a responsible factor of safety is illustrated by examples that include a main underground entry heading, brick vener houses, pipelines, and high tension transmission towers
Digitalization for Optimization: Easier and Cheaper
Digitalization and standardization of blasting quality control for optimization and costs saving. Easier with new systems and cheaper because the control is so high that the improvement and costs savings make this activity one of the most profitable of D&B process.
Digitized, Integrated and Optimized Drill and Blast
Case study of the adoption of an integrated cloud and mobile based drill /blast digital technology platform is presented. Technology description, points and methods of integration, benefits of the technology are highlighted. Also the challenges in technology adoption, the care and effort required by the mining company are mentioned.
Dilution and Ore-Loss Optimization in Underground Mines
The mining companies put a lot of effort to extract lower grade with minimum cost. The dilution control helps to achieve this goal. In Polymetal Silver Magadam Mine we succeeded to control more than 20 blasts by keeping almost the same grade measured in the face.
Dilution Control While Maximizing Fragmentation in Gold Mines with the use of Tracking Microchips
Combining good fragmentation with dilution control is a challenged that can be addressed with proper blast designs and ore tracking technology. Case studies are shown where innovative designs have been combined with dilution control technologies.
Direct Stress Monitoring of Pipelines and Development of Limitations - A Case Study
Petroleum pipeline companies often impose very conservative vibration limits which must be observed during blasting. The effective use of strain gages and seismographs allowed the pipeline company to better understand actual pipeline stresses during blasting which then facilitated effective and efficient completion of adjacent pipeline replacement that required rock blasting.
Dynamic Pressure Study to Minimize Misfires at Pueblo Viejo Mine
Instrumentation strategy and results of a monitoring campaign conducted at Pueblo Viejo mine is described. Dynamic pressures generated by a blasthole in nearby boreholes were measured using Tourmaline crystal sensors. A Scaled Distance model was generated, allowing construction of an operationally applicable design tool that responds to entailed safety issues.
The Effect of Artificial Discontinuities Formed by Presplitting with Different Depts on Structural Damage Risk
To investigate the effects of artificial discontinuities with different depths on structural damage risk, R&D activities were carried out in aphanitic trachybasalt in Ethiopia. 123 records obtained from 31 shots. It is determined that the artificial discontinuities with different depths reduced PPV values by %92,03 and protected the structures.
Evaluation of the Methods used to Determine the Constituents of Commercial Bulk Explosives used in the Mining Industry
This project aimed to evaluate a range of methods available for the quality control of explosive formulations. The evaluation methods included wet-chemistry lab testing, Raman Scattering, Plasma Spectroscopy, Flame Spectroscopy, Fuel content of ANFO and a newly developed Bulk Explosive Analyzer (BEA).
Ground Vibration Attenuation Rate due to Blasting in South Florida
This paper examines the ground attenuation rate in south Florida due to blasting at White Rock Quarries. The study was performed to determine if quarry blasting could feasibly damage nearby residences, which is a contentious issue in the area due to the close proximity of the residences to the mines.
Ignition and Growth Reactive Flow Model for Aluminized Emulsion Explosive
A routine based on the optimization program LS-OPT code was developed to calibrate the parameters of Ignition and Growth Reactive Flow Model for aluminized emulsion explosive.
Improving Geologic Knowledge with IOT Sensors on Blasthole Drills
This paper presents new results from recent Seismic While Drilling trials in iron ore, metallurgical coal, and hard rock mines globally. The measurements are compared with wireline geophysical logs, core data and conventional measurement while drilling systems to validate the technology and show how the data can be used.
Investigating the Use of Complex Geometry Shock Tunnels to Model Urban Bombings
Using complex geometry shock tunnels to simulate urban bombings and similar scenarios.
Investigation of Blasting Fumes using Numerical Simulation
Studies show that as much as 60% to 70% of the fumes produced during underground blasting can remain entrapped in the adjacent rock mass or in the muckpile. This study uses a CFD, scFLOW Software to analyze the flow of the entrapped fumes.
JKVBOC Blast Movement Model Applications for Ore Control in Open Pit Mines
JKVBOC blast movement model has been developed as a tool for ore control and optimization of the value within a blast in open pit mining. Two case studies are presented to show the model performance and its potential in minimizing ore loss and dilution.
Lessons Learned from Blasting in Highly Weathered Sandstone
An engineering case study of a blast performed on a highly weathered sandstone isthmus in an area sensitive to vibration and airblast, the challenges associated with such a blast, the methods used understand rock characteristics, the blast design considerations, and a discussion of the blast results.
Measurement of the in Hole Density of Gassed Explosives at Peruvian Mines
1. Abstract 2. Introduction 2.1.Background 2.2.Objetives 2.3.Conceptual Foundation 3. Proposed method 3.1.Measurement of the hydrostatic pressure of the explosive 3.2.Pesion Monitoring and Analysis Software 4.Field tests 4.1.Yanacocha Mine 4.2.Antamina Mine 4.3.Toquepala Mine 5. Results 5.1. Density and Detonation Velocity 5.2. Fumes mitigation 5.3. Costs 6. Conclusions 7. Acknowledgment 8. References
Minimizing Coal Damage and Loss Due to Cast Blasting
The main objective of any cast blasting is to maximize the coal recovery. This paper discusses the importance of coal surface mapping, rock properties of roof and floor of the seam, accurately loading, and initiating the blast from multiple locations in order to maximize the recovery of clean coal.
Modeling Blast Induced Damage in Open Pit Mines with Numerical Models
Understanding the effect of blast induced damage on wall stability is critical to safe and economical operation of a large open pit mine. Numerical modeling is used to demonstrate the mechanisms that cause to high wall damage.
Modeling Reactive Sulfide Rock at the Red Dog Mine
In June 2014 a hole deflagrated. Drill core testing was initiated to understand this behavior. The samples were subject to Reactive Ground Catalyzed Adiabatic and Specific Heating Capacity testing and mineralogical analysis. Assay based classifications for separating non-reactive from reactive ground and different degrees of reactive ground were developed.
New Horizons of the Engineering of Blasting in Service of Productivity: Selective Sequencing
The purpose of the paper is to expose the new advances in blasting engineering, associated with electronic sequencing and its impact on the strength of fragmented rock. The document explains how to define and implement selective electronic sequencing, promoting microfracture and thus positively impact productivity.
New Model for Realistic 3D Blast Simulation
3D model of a new type to simultaneously simulate the fragmentation of the rock, its damage, its displacement and the associated seismic levels in the surrounding media. Processing time allows to run 100 holes simulation in a few minutes making the model compatible with a production cycle.
Non-Ideal Detonation Modeling of Ammonium Nitrate-Based Explosives
An ellipsoidal shock shape approach is used to model the main properties from some of the most common non-ideal explosives used in mining and quarrying industries, including the complete axial flow solution.
On Board Excavator Dilution Detector
A new technology for dilution control consists of installing on ore excavators a detector for rock movement. This prevents unsafe conditions as walking over a blasted muckpile and results in high detail 3D ore-waste contours.
Pattern Optimization to Reduce Overbreak in Ore Galleries and Improve Stopes Dilution Control
The abstract summarizes a work plan that is being carried out to reduce overbreak in ore galleries and consequently improve dilution control in production stopes. This optimization plan was designed in order to achieve the 2019 mine goals.
Peculiarities of Drilling and Blasting in Underground Small-scale Mines
Drilling and blasting processes in artisanal and small-scale mining present peculiar, irrational and inefficient characteristics that can be mitigated by combining knowledge and engineering techniques with the experience of small-scale miners, obtaining better results at low investment costs.
Presplit Design Based on Borehole Pressures
This paper presents research which disproves the shockwave theory of presplitting and give proof to the hoop stress theory of presplitting. Additionally, models are given to design blasts for all rocks, including weak siltstones and mudstones, based on borehole pressure.
Projectile Generator Design for Underground Coal Mine Seal Testing
The paper details the construction and initial testing of a projectile generator intended to test the effects of high velocity impacts on underground coal mine seals.
Quake, Quarry or Quack
Review of vibration data collected from a 4.4 magnitude earthquake in central Tennessee.
Regression Model for Surface Vibrations from Underground Operations
This document highlights a regression model of surface blast vibrations produced from various underground mining operations. It includes vibrations from short and long distances.
Render-Safe Operations in an Urban Environment
Rendering safe explosives in an urban environment presents a unique challenge due to disruption and safety concerns of the general public. A recent operation, in an urban environment, to render-safe deteriorated dynamite and blasting caps, utilized innovative neutralization chemicals to render-safe deteriorated dynamite while protecting the general public.
S-Load Cartridge
The full presentation will go in depth on the design, testing, patenting, first 2 years in operation in Europe and lessons learned along with videos of the patient testing and live operation.
Sequence of Events during a Blast
Ways to achieve good blast by insuring explosive energy divides into the weakening action of the shock wave to prevent large collar blocks and toe, and adequate stress field intensity SS which is necessary to obtain good fragmentation size distribution at the crusher as well as adequate burst out movement.
Shock Pressure Transmission Characteristics in a Granitic Rock due to Calibrated Explosive Loads
The paper describes shock pressure transmission characteristics in a well-characterized granitic rock from small-scale controlled experiments. It involved single hole experiments with varying charge weights (PETN detonating cord) for both air and water coupling conditions in the distance range of 1x to 9x borehole diameters.
Signature Hole Analysis and Vibration Modeling: An Indonesian Case Study
This paper is about ground vibration control modeling using signature hole analysis.
Six Pillars, Inventory Management & ATF Record-keeping
This paper reviews the implications of ATF 2007-1 allowing explosives licensees to maintain compliance records electronically. Specifically, how electronic record-keeping can simplify and streamline compliance requirements while enabling licensees to have better, faster, and more accurate management and operations data with no additional effort.
Subdrill – The Underutilised Blasting Parameter
In open cut metalliferous blasting, the use of subdrill has primarily been limited to achieve excavation down to the target floor elevation. A new method for evaluating and determining subdrill, and its impact on powder factor and run of mine fragmentation in open cut blasts is presented.
Technology for Risk Management and Decision Making in Civil Explosives
This paper explores the role technology has played in the process of risk management and decision making over time. It discusses how the integration of electronics, communication and data management in explosive products and services contributes to better risk management and better decisions, improving safety and security for all stakeholders.
The Art of Communication and Business in the Explosives Industry
This presentation explains the proper communication and business skills to successfully achieve approval of blasting jobs. It will also explain proven techniques that have worked in NYC to achieve and improve communication, cooperation, and compliance. Examples will be presented of level projects that have been approved using these skills.
The Design and Application of Deep Hole Blasting Parameters in City Under a Complicated Environment
This article discusses the optimized design of deep hole blasting parameters under a completed environment (including city) and the precision management experiment of the site operation.
The Effect of Faults, Delay Time and Scaled Distance on Vibration Parameters
This paper is to present the analyze results of 118 blasting vibration data in Kartal formation, which includes faults within, to understand the effect of delay time, fault and scaled distance on the parameters of vibration during the tunnel excavations by blasting in the scope of Yenisahra Subway Station project.
The Explosives Industry and Governmental Nexus
A proper understanding of the governmental mechanics that affect the explosives industry is critical for the industry to be able to be proactive in playing a role in these processes in a democratic way. This paper discusses these mechanisms among the different branches of the US Federal government.
Track and Trace in Europe and Worldwide, the Beginning, the Present and in the Future
The paper summarizes the developments in the explosives industry since the introduction of the obligation to track and trace explosives. Conclusions are drawn, and current and future developments are considered.
Tunneling in Thinly Foliated Rockmass Conditions
Tail Race Tunnel for a 1020 MW hydroelectric project was successfully excavated in thinly foliated rockmass conditions by D&B method. Rock Class “Q” values were between III and IV. Blasting was by full face parallel hole. Handling the cavities and overbreak was time consuming and warranted additional supports.
Using Artificial Intelligence and 3D Imaging to Provide Real-time Particle Size Analysis on Haul Trucks
We propose a particle size analysis solution for haul trucks that does not impact current operational workflows. Using artificial intelligence and 3D imaging, this solution identifies haul trucks as they drive by, and then accurately calculates the particle size distribution of the visible material in each truck load.
Utilising a Dual Belly Auger MPU to Manufacture Bulked Inhibited Explosives
This paper presents the unique benefits and characteristics of bulking inhibited explosives for use in reactive ground, and their manufacture with modified MPUs.
Vibration Data Analysis to Optimize the Blast Design and Improve Shovel Productivity
This paper discusses using near field seed waves to improve blast results and consequently improve productivity of loading and haul operations. Statistical analysis of a strong data base has supported the conclusions of this study,
Vibration Monitoring Standards Connected to the Use of Explosives in Different Countries
Vibration monitoring standards connected to the use of explosives in Different Countries. Comparison based on survey, interviews, standard analysis and more.
Vibration Monitoring Using In-house Developed Devices - A Taylor’s Approach
Development of new equipment using a microcontroller and electronic sensors for vibration monitoring was tested side by side with traditional seismographs. The results were used to estimate the attenuation law and are showed on this paper.
Vibration Seed Wave Analysis to Predict and Reduce Vibration Levels in Open Pit
This study is based on the analysis of several seed wave models. The analysis aims to perform thousands of simulations to predict and achieve the lowest vibration values that will be generated by multiple charges. In this way, it could be determined the optimal timing to minimize the vibration values.
Violence Factor - The New Tool for Blast Performance Analysis
Violence Factor is a new, quantitative approach to analyze the cratering mechanism of blasts which is scaled to the bench height. This paper gives a new key performance indicator (KPI) that managers can use to assess the effectiveness of a blasting program and designers can use to minimize violent blasts.
Wave Analysis and Determination of Interference Times to Minimize Impact by Vibrations
Elementary waves, optimal time of interference, vibrations, lower level of vibrations
What We Learned While Determining VOD’s in Underground Small Hole Blasting
Trials and tribulations of obtaining Velocity of Detonation (VOD) readings both underground and in a surface mine using a time-domain reflectometer (TDR) type VOD monitoring unit.
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FOR IMMEDIATE RELEASE
August 29, 2023
WARNING: ISEE SAVANNAH HOTEL REGISTRATION WARNING
Unauthorized Housing Companies Contacting Sponsors & Attendees
Unauthorized housing companies are contacting ISEE exhibitors, sponsors and prospective attendees and identifying themselves as being affiliated with ISEE and telling you that hotels in our block are almost sold out or offering a discounted rate.
ISEE has NO affiliation with these organizations and in no way endorses their services.
- Any company contacting you via email or phone does not work on behalf of ISEE nor has ISEE provided them with your contact information.
- WHY YOU SHOULD AVOID ANY INTERACTION WITH THESE COMPANIES
- These companies do not represent, work for, or are authorized to represent ISEE. You are not using ISEE’s protected blocks to make your hotel registration.
- Companies will try to make an emotional appeal to get you to reserve your room with them. Do not fall prey to the emotional appeal that these companies can get you a “lower rate,” “better hotel,” “upgraded amenities” or other enticements. These companies are fishing and again, are not working with ISEE.
- These companies are trying to get access to your credit card number. These are SCAMS. If you give them your information, no official hotel reservation will be made in your name or be tied to the conference.
- ISEE would never give your name or contact information to an outside company for a room reservation. WE WILL NOT CALL OR EMAIL YOU TO PERSONALLY HELP WITH HOTEL RESERVATIONS. We will direct you to our portal located on our website to make hotel registrations. This is the ONLY approved method to make your hotel registration.
If you receive a phone call or email from any company offering housing assistance, please contact Hiranthie Stanford, ISEE Senior Director at This email address is being protected from spambots. You need JavaScript enabled to view it..
We take this matter seriously and have filed complaints with authorities to protect our members, participants, and stakeholders.
FOR YOUR SAFETY, PLEASE DO NOT RESPOND!
Sincerely,
Steven B. Shivak, MS, CAE
Executive Director
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Grand Hyatt San Antonio Hotel
600 East Market Street
San Antonio, Texas 78205
Texas-Style Luxury at the Grand Hyatt San Antonio Hotel on the River Walk
Set along the spectacular River Walk, Grand Hyatt San Antonio is steps from trendy downtown restaurants, bars, and all the historic sites and attractions that make San Antonio one of the most culturally rich cities in the country. Enjoy this convenient location with modern guestrooms, a rooftop pool, complimentary in room Wi-Fi, 24-hour fitness center and the popular Ruth Chris Steak House. The San Antonio International Airport (SAT) is only 9 miles from the hotel.
Reservations Information
For sleeping room reservations, call the Grand Hyatt San Antonio at 1-888-421-1442. Please be sure to mention ISEE to receive the conference discount rate of $210 single/double. Reserve your sleeping room now online at www.isee.org. Do not delay in making your reservations because the hotel is expected to sell out early. Your help is needed in keeping meeting costs down by reserving your sleeping rooms at the Grand Hyatt San Antonio.
For online sleeping room reservations, click here.
La Quinta Inn & Suites San Antonio Riverwalk, 303 Blum Street, is the overflow hotel for this conference and is located in walking distance from the Grand Hyatt San Antonio. The ISEE room rate is $179 single/double. To make reservations, call 1-866-527-1498, opt. 1 and mention ISEE’s 44th Annual Conference.
Transportation
You will receive a discount off the lowest applicable published airfare when you make airline reservations with Delta Airlines. Book online at www.delta.com and enter the meeting event code NMQR7 under Advanced Search.
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Experience the Paris Las Vegas Hotel & Casino
The Paris Hotel sleeping room rates are $159 single/double Sunday through Thursday and $189 Friday and Saturday. Bally’s are $119 Sunday through Thursday and $149 Friday and Saturday. To reserve your sleeping room, visit: https://book.passkey.com/go/SPEXP2 You can also call Paris at 877-603-4389 or Bally’s at 800-358-8777.
Please be sure to mention ISEE to receive the conference discount rate. Do not delay in making your reservations because the hotel is expected to sell out early.
Reservations
Sleeping room rates are $159 single/double at Paris or $119 single/double at Bally’s (based on availability). To reserve your sleeping room, click this link: https://book.passkey.com/go/SPEXP2 You can also call Paris at 877-603-4389 or Bally’s at 800-358-8777. Please be sure to mention ISEE to receive the conference discount rate. Do not delay in making your reservations because the hotel is expected to sell out early.
Transportation
ISEE has partnered with United Airlines for air travel to our upcoming event. Call the United meeting reservation desk at (800) 426–1122. Reservation desk hours are 8 a.m.-10 p.m. EST Monday through Friday and 8 a.m.-6 p.m. EST Saturday through Sunday. Booking fees are waived for meeting reservations. International customers: please contact your local United reservation desk. MileagePlus members earn Premier Qualifying Dollars and miles for their travel. To make flight reservations online please use discount code ZK6M509544