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Single Round Blasting of 10 Food Diameter x 65 Foot Depth Emplacement Shaft Collars at the Mercury, Nevada Test SiteBy Tom Short, Bill Beam
Some of the weapons testing shafts at Mercury, Nevada require depths of 1000ft and diameters of 10 feet. The top 40 feet to 65 feet is drilled, blasted and excavated by Large caisson type augers in or
Jan 1, 1991
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Improved Fragmentation and Safety with Proper Borehole Loading TechniquesBy Lars Osen
Both fragmentation and safety can be improved by following proper procedures in loading boreholes. Proper loading procedures such as primer location, borehole sealing, decking, and stemming along with
Jan 1, 1985
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Improving the Amount of Material Cast at Highvale Mine Using Electronic DetonatorsBy Robert Slivinski, Kyle Hobbs, Michael Stern, John Willox, Brad Jewson
Prairie Mines & Royalty Ltd. produces over 12 million tonnes annually of thermal coal for TransAlta’s Sundance and Keephills power stations from the Highvale Mine. This opencast mine is next to a lake
Jan 1, 2008
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Journal: 20th Annual Photo Contest / Boiler HouseBy Ryan Redyke, Jared Redyke
The demolition of an old power plant boiler house in Parsons, Kansas calls for the use of some linear shaped charges. The steel is thick and the structure is heavy but gravity can be a blaster’s best
Jan 1, 2015
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An Overview of the Effect of Soil Properties on Explosive CrateringBy Denis Rickman, Jon Windham, Stephen Akers, Byron Armstrong
The soil crater formed by detonation of an explosive charge is of considerable military interest because of the common use of explosives to create soil obstacles. The soil crater is also an important
Jan 1, 2010
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Reactivity of ANFO Mixtures with Midwest High Sulfur Coals and PyritesBy John W. Brown
For seventeen years, I have been involved in surface coal mining in the Mldwest coal fields only to find that once again, I have experienced a problem that was not known to exist in our area. The exis
Jan 1, 1992
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Forthcoming European Directive on Pyrotechnic ArticlesBy R. Wharton, M. Bagley
The paper reviews the likely introduction of a European directive covering the sale of pyrotechnic articles in member states of the European Union. The background and structure of the directive are de
Jan 1, 2007
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Modeling Coal Seam Damage in Cast BlastingBy Dale S. Preece, Stephen H. Chung
"A discrete element computer program named DMC_BLAST (Distinct Motion Code) has been underdevelopment since 1987 for modeling rock blasting (Preece & Taylor, 1989). This program employsexplicit time i
Jan 1, 1999
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Experimental Investigation on Forced Transition of Gaseous Explosives from Combustion to Detonation in PipesBy Chen Aiping, Wei Banyun, Chen Canchang
"The gaseous explosives consisting of combustible gas and combustion-supporting gas wereused in the opening end of a steel pipe and the ignition was in the closed end of the pipeusing continuous air f
Jan 1, 1993
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Journal: Security Matters Procedures to follow When Explosives Are Taken in a Crime (e.g., Theft)**By Unknown
Contact Local Law Enforcement Authorities. Contacting the local law enforcement authorities is essential to the quick recovery of explosives taken in a crime. Contact Local ATF Office. The local ATF o
Jan 1, 2009
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Granite Blocks Extraction by Detonating Cord in Different Italian Quarry Basins: an Overview of Design and Operation PracticesBy Mauro Fornaro, Marilena Cardu, Renato Mancini
Detonating cord cutting is widespread in dimension stone extraction, especially in the case of hard, abrasive stones as granites, an important resource for Italian industry. General data on this produ
Jan 1, 1994
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Numerical Simulation of Fragmentation During the Throw Stage of BlastingBy C H. Ryu
This paper presents a simplified two-dimensional numerical model of block fragmentation in a Jointed rock mass during the late or throw stage of a blast after wave effects have subsided. The model is
Jan 1, 1986
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The Effect of Rock Strength on Perimiter Blasting and the "Blastibility" of Massive RockBy Qingshou Chen, Paul N. Worsey
It has been recently argued that rock strength has little effect on the final results of pre-split blasting and is of only minor importance when blasting rock in general. However, it can be shown that
Jan 1, 1986
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Supression of Blast Pressure and Noise from Implosive Type ConnectorsBy Ettore Contestabile, Cameron Thomas
Implosive-type electrical/mechanical connectors such as XECONEX have been used extensively for joining electrical transmission lines. This implosive action of explosives has also been applied to other
Jan 1, 1995
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Supression of Blast Pressure and Noise from Implosive Type Connectors (b7d7fd43-f48c-43a3-af6c-8966c9e70d51)By Ettore Contestabile, Cameron Thomas
Implosive-type electrical/mechanical connectors such as XECONEX have been used extensively for joining electrical transmission lines. This implosive action of explosives has also been applied to other
Jan 1, 1995
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An Assessment of Ore Waste and Dilution Resulting From Buffer/Choke Blasting in Surface Gold MinesBy Dale S. Preece, J Paul Tidman, Stephen H. Chung
A discrete element computer program named DMC_BLAST (Distinct Motion Code) has been under development since 1987 for modeling rock blasting (Preece & Taylor, 1989). This program employs explicit time
Jan 1, 1998
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Rugged Emulsion Explosive Formulation #37 - Candidate PermissibleBy Michael S. Wieland, Thomas C. Ruhe
Delay blasting in underground coal results in shock waves traveling through the coal that can damage delay charges remaining in the blast pattern. Undetonated explosives which are dynamically desensit
Jan 1, 1992
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On the Influence of Powder Factor on Mucking RateBy Lina Lopez, Jose Sanchidrian, Manuel Lopez, Pablo Segarra
Previous work in which rock properties and blasting parameters (geometry, charging and timing) were reported together with truck filling times, is taken as a starting point for a thorough analysis of
Jan 1, 2008
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Effects of Firing Time Variations and Explosive Array Length on Seismic Wave Propagation from Quarry BlastsBy Sharon K. Reamer, Klaus G. Hinzen, Brian W. Stump
"This study investigates seismic wave propagation from two production shots in a limestone quarry. Our motivation is to investigate the efficiency of two superpositioning techniques. The production sh
Jan 1, 1991
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Energy, Strength and Performance, and Their Implications in Rating Commercial ExplosivesBy B Mohanty
Several parameters such as, Energy, Strength, Brisance, Impulse, and Bubble Energy, are in common use in the explosives industry today to rate commercial explosives in terms of blasting performance. H
Jan 1, 1981