Optimization of Blast Fragmentation Curves and Determination of Rock-Blast Domains at Coimolache Mine, Based on Rock Factor Criterion and Kuz-Ram Model
The application of the Kuz-Ram model for the prediction of fragmentation is used worldwide, in Coimolache Mine it was used to determine blast domains and optimize the process by obtaining drilling patterns that meet a required X80 and reducing the uncertainty of drilling.
A New Blasthole Location Error Detection and Compensation System for Open Pit Mines
A new technology for energy distribution optimization, supported by NIOSH.
Blasting for Rescue Applications
This paper will cover blasting techniques that are applicable to underground and other rescue that involves removing obstacles and breaking rock in close proximity to rescuers and subjects.
The Effect of Entrapped Blast Fumes on the Mine Re-entry Time
Researchand Application of HM(Hole-mixed) Truck for Emulsion Explosives
In order to achieve anti-terrorism, production safety, better explosive performance, lower cost, and environment protection, we developed HMS (emulsification in borehole).
Crack Displacement and Vibration Measurement of an Underground Portal
Very little studies have investigated the behavior of cracks in unlined tunnels over long periods of time, especially when such flaws are subjected to blast-induced vibrations. Using a pool of 30+ blast events, a positive correlation was found between the peak particle velocity and peak crack movement.
A Comparison of Recent and Previous Pipeline Blasting Studies
This paper compares measured blast induced strains on operating, full scale, buried pipelines with three similar past studies. The recently performed study represents realistic and modern pipeline blasting techniques combined with modern data acquisition. The evaluation compares measured PPV and strain, as well as calculated stress, at equivalent scaled distances.
Harmonic Energetic Delamination of Nuclear Structures
Harmonic energetic delamination a building is being considered for demolition at a formerly known atomic power lab. The building is within a containment structure under a negative pressure, so that no radioactive material is leaked out to the environment. A new approach was developed to make this work possible.
Structure Response Study at a Quarry in Sumterville, FL
Global wall strains from 4 to 77 micro-strains were measured at three structures adjacent to a highly-confined Florida quarry blast when PPV amplitudes ranged up to 6.05 in/s. Increasing the peak zero-crossing frequencies with carefully control delay timing helped to lower ground displacements affecting wall strains.
Overpressure and Ground Vibration from Pipeline Blasting
We have analyzed overpressure and ground vibration measurements for construction blasting for a large pipeline project. These field-measured levels have been compared to existing prediction curves in the literature and new curves have been proposed for overpressure and ground vibration for pipeline construction blasting activities.