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Optimization of Blasting Pattern in an Underground Coal Mine for Maximum Production with Minimum Roof Disturbance
By R. Singh, M. Roy, D. Singh
Success of a blasting pattern in Blasting-off-the-solid (BOS) in Bord (Room) & Pillar method of coal mining is judged by the percentage of pull achieved vis-à-vis the yield of coal produced in a blast
Jan 1, 2003
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Seismic Radiation from Explosive Charges in the Near-field: Results from Controlled Experiments
By L. Trivino
Blast-induced damage criterion based on the peak particle velocity has worked reasonably well for estimating building damage. However, the same criterion cannot be used to estimate damage to rock and
Jan 1, 2009
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Recent progress with the European Directive on Pyrotechnic Articles
By Martti Hagfors
UNDERWATER EXPLOSIONS - Part 6 - EFFCTS OF CYLINDERICAL SHAPE OF CHARGE TO THE RESULTS OF ENERGY MEASUREMENTS OF EXPLOSIVES
Jan 1, 2008
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Using Vibration Prediction to Reduce Blasting Costs and Complaints (c2b05a63-1c96-45ce-a036-acc1a0a37215)
By Thomas Leonard, Philip R. Berger, Bryan E. Papillon
Bardon Trimount Inc., a large producer of aggregate, crushed stone, and concrete, was experiencing significant public opposition to its five quarries in the Boston area. It was believed by the authors
Jan 1, 1996
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Design of Large-Scale Choked Destress Blasts in Mine Pillars Using the Empirical Destressability Index Methodology
By Richard Brummer, John Hadjigeorgiou, Patrick Andrieux
Some of the major challenges associated with underground mining at depth and/or under high extraction ratios are related to the resulting high stress levels, which can lead to the failure and collapse
Jan 1, 2012
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Emulstion Explosives Technology
By David G. Borg
Emulsions explosives, like slurries or water gels, are water based explosives. Emulsions were first introduced as a packaged blasting agent in the late sixties. Since then, many new variations have be
Jan 1, 1994
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Effect of Water on ANFO/Emulsion Blends in Surface Mine Blasting (0b4347b7-0acc-4878-9511-eb82e38fb138)
By Stuart Brashear, Lee Schettler
The effect of water on several ANFO/emulsion blend ratios are documented by both physical observations and analytical testing to demonstrate the effect even small quantities of water can have on water
Jan 1, 1996
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The Mechanics and Physics of Electronic Blasting
By H. Rossmanith
This contribution introduces the fundamental concepts of wave propagation and fracture mechanics which form the basis of electronic blasting, i.e. precise initiation timing using electronic detonators
Jan 1, 2003
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Final Rock Slope Blasting Techniques: Considerations in Design and Execution
By Michael F. Barber
"Highway slopes are intended to remain stable over a long period of time. Unexpected slope failures can be costly in terms of human life and property damage or loss. Cleanup of failures can prove to b
Jan 1, 1999
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Prediction of the Ground Vibration Attenuation Induced by Blasting for the Different Rock Masses
By A. Karadogan, G. Tuncer, A. Kahriman, S. Gorgun
This paper presents the results of ground vibration measurements induced by blasting operations at five different sites located close to the residential areas. Within the scope of this study, ground v
Jan 1, 2003
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Drawbacks of Blast Vibration Regulations
By Mark Svinkin
The purpose of this paper is to present an overview of recommended existing criteria of ground vibrations generated by blasting. It is shown that these criteria have limited liability because they wer
Jan 1, 2003
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Some New Insights on Borehole Wall Pressure When Using De-coupled Charges
By X Meng, W. A. Hustrulid, M. K. McCarter
Rock excavation in both surface and underground mining is largely accomplished using the drill and blast technique. At the perimeter of such excavations, cautious blasting procedures are often employe
Jan 1, 2005
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The Journal of Explosives Engineering Vol 21 No 3 - Dynamite Daze
I was lucky to land a job in the powder business. I was looking for some way to support my wife and first child to be when I saw an ad in the Hercules magazine, “Explosives Engineer” for technical rep
Jan 1, 2004
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Coal Supply Engineering Audit Supply
By John W. Gunnett
The purpose of this afternoon’s presentation is to highlight the investigative proce dures employed to complete an engineering audit of a mining operation. Skelly and Loy has been retained to perform
Jan 1, 1992
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Blasting Accidents in Surface Mines, a Two Decade Summary
By Harry Verakis, Thomas Lobb
In the past decade, approximately 5 billion pounds of explosives were used annually in the United States. Most of this quantity of explosives was used by the mining industry and coal mining was the do
Jan 1, 2001
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The Benefits of Electronic Blasting Systems for Use in UG Mass Pillar Blast Design
By Felix Torres
CVRD is one of the largest mining companies in the world. Adoption of new technology and improving operational efficiency are top company priorities. Initiatives in these areas have driven continuous
Jan 1, 2003
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Swedish Standards for Ground Vibrations and Airblast
By Roger Holmberg, Donald Jonson
The Swedish Standard SS 460 48 66, “Vibration and shock - guidance levels for blasting induced vibration limits”, is based on more than 50 years of experience from blasting close to structures and tun
Jan 1, 2005
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Description of Damage Constitutive Model as Documented in Pronto3D Manual 3/89
By Billy J. Thorne
The damage model in PRONTO simulates the dynamic fracture behavior of brittle rock. It is based on work started by Kipp and Grady, [lg] continued by Taylor, Chcn and Kuszmaul [I91 [20] and recently.mo
Jan 1, 1989
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Micro Economic Forces in the Mining and Explosives Industries
By David P. Reddick
Economics is a social science dealing with the allocation of scarce resources. In modern times the “science” was identified by Adam Smith in his book, The Wealth of Nations, written in 1776. Mr.Smith,
Jan 1, 1992
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Accublast Detonator - A New Era of Precision in All-Electric Detonators
By W B. Gregg
The rock blasting and mining industries use a system of detonators and explosives for mining operations. Many detonators use small metal bridgewires, which are heated by passing a current through the
Jan 1, 1994