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Worsey-Silva Equation for Modeling Fragmentation Caused by Row TimingBy J. Silva, T. Worsey
The Worsey-Silva equation determines the optimal row timing for the smallest fragmentation and allows fragmentation models to be adjusted due to row timing. The equation utilizes the concept of dynami
Jan 1, 2024
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Site Specific Blasting Model Using Schmidt Tensile Strength and Image AnalysisBy K. M. Kim, J. B. Kemeny
A case study was conducted with 5 shots with varying pre-blast block sizes and explosive energies. From this case study a site-specific predictive fragmentation model was developed. There are two main
Jan 1, 2011
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Damage Criteria for Nearby Structures During Underground Explosions and EarthquakesBy Krishna Nand
For assessing the safety of structures during underground explosions, ground particle velocity gives the best damage criteria, and 100 mm/see of ground particle velocity has been internationally accep
Jan 1, 1988
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Time Window Vibration Control Techniques Cautionary Tales For Explosives EngineersBy Adrian Moore, Alan Richards
Time window techniques that limit the explosive charge mass being fired within a specified time window (commonly 8 milliseconds (ms)) have been used for many years and are widely accepted by explosive
Jan 1, 2002
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The Application of High Speed Video System for Blasting ResearchBy Quian Liu
Since the establishment of the CANMET Experimental Mine in Val d'Or, Quebec in 1991, research activities in rock fragmentation have been carried out not only in the underground laboratory but also in
Jan 1, 1994
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A Technique for Measuring Toxic Gases Produced by Blasting AgentsBy Richard J. Mainiero
Traditional techniques for the experimental determination of toxic fumes produced by the detonation of high explosives are not applicable to blasting agents. To detonate properly, blasting agents requ
Jan 1, 1997
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Controlled Blasting for the Construction of an Underground Power HouseBy Abraham Lindo
Panama’s current economical growth demands an increase in electric power supply; projected energy supply for 2012 exceeds the demand by as little as 2%. In an effort to comply with the demand, several
Jan 1, 2013
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Practical Blasting Damage Investigating for Insurance Claims and Law SuitsBy David A. Paul
Over the past several years a great deal of information on blasting vibrations and their effects on structures has been generated. Much of this knowledge has been gained through the use of ground vibr
Jan 1, 1983
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A System for Remotely-Controlled, Continuous Drill and Blast ExcavationBy Carl R. Peterson, Robert G. Lundquist
The development of a remotely-controlled drill and blast excavation system is desirable both because it is potentially more economical than mechanical tunneling in hard rock and for safety. A serious
Jan 1, 1983
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Journal: Safety Talk, The Blaster’s Duty of CareBy William Reisz
In our line of work,like many other professions, there may be times when circumstances or a series of events may arise, contributing toward unacceptable risk. When multiple parties are involved, there
Jan 1, 2014
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Oxygen Balanced Emulsion-ANFO Blends for Use in Flammable AtmospheresBy Michael J. Sapko, Eric S. Weiss
The U.S. Bureau of Mines has been conducting research on the secondary explosion hazards associated with the mining of oil shale under gassy mine conditions. Explosive incendivity tests have been cond
Jan 1, 1990
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Use of In-Situ Rock Properties for Optimization of FragmentationBy Daniel Roy, Chris J. Preston, Ron J. Elliott
This paper discusses the use of pressure transducers in water filled boreholes in conjunction with surface mounted geophones to gather field data for in-situ dynamic rock properties determinations. A
Jan 1, 1996
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Numerical investigation of impact of misfires and out-of-sequence delays on fragmentation and gravity flow in SLCBy C. Yi, D. Johansson, C. San Miguel, M. Wimmer
Sublevel caving (SLC) is a mass mining method based upon the utilization of gravity flow of blasted ore and caved waste rock. Production blasting has significant impact on the efficiency and productiv
Jan 1, 2024
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The Utilization of Personal Computers for Blast Design and AnalysisBy John L. Floyd
A personal computer is a valuable tool for blast design and analysis. Programs designed for the personal computer, such as the electronic spreadsheet, can be used for a wide range of applications. The
Jan 1, 1987
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Intelligent Information Management for Improved Blasting Practice and Environmental ComplianceBy W. J. Birch
The recording of information is critical to the blasting process, whether it be for planning purposes, statutory requirements or environmental compliance. The review and analysis of past data can play
Jan 1, 2002
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Development of the Remote Controlled Blasting System for Tunnel ConstructionBy Minoru Kawamura, Yukio Kato, Yoshikazu Hirosaki, Satoru Suzuki
A wireless blasting system for tunnel construction which consists of a loop antenna, oscillator and blaster, has been developed. The basic technology of this method had been studied in the 1970s to de
Jan 1, 1998
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Using State-of-the-Art Techniques for Positioning Mining EquipmentBy George P. Schivley
The careful positioning of the drill rigs that drill the holes into which explosives are then loaded is critical to the success of the subsequent blast. Today a system of satellites in space, each tra
Jan 1, 1996
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Optimum Design for Blasting Plastic Material Using High Speed PhotographyCase histories in blasting show that Livingston's cratering technology has been applied successfully to blast designs with explosives having a charge length to diameter ratio not larger than 6. But th
Jan 1, 1987
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A Fractal and Damage Model for Rock-Breaking by BlastingBy Wang Zhong Qian, Liu Hui
The paper proposed a fractal and damage model for rock-breaking by blasting, which assumed that the process of rock-breaking results from intrincent fractal development and the accumulation of damage.
Jan 1, 1997
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Deep Hole Blasting with SMS - An Excess for Better ProductivityBy M S. Sandhu
Singrauli area of Madhya Pradesh in India has been developed as the power capital expected to produce around 11000 MW in near future requiring 65 million tonnes of Coal per annum. Thermal power plants
Jan 1, 1998