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Model Rock Blasting Measures Effect of Delays and Hole Patterns on Rock FragmentationBy J W. Edl, F C. Wu
In instrumented model rock blasting experiments in granite blocks, best fragmentation results were obtained when delays between holes were 1 to 2 milliseconds per ft. of burden and when a rectangular
Jan 1, 1975
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Trench Blasting - Modern Technology for an Old HeadacheBy L D. Lawrence, W B. Sudweeks, J Bailey
Modern era urbanization is presenting at least one category of explosive consumers with a growing concern for ecological and environmental problems associated with their blasting processes. The constr
Jan 1, 1988
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Damage Levels for Reinforced Concrete Columns Subject to Internal Explosive ChargesBy I. Petropouleas, J. Croll, R. Bassett
A programme of tests on controlled internal explosions to a class of circular reinforced concrete columns, has allowed the relationships between the blast energy and the extent of local damage to be u
Jan 1, 2006
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Blasting at the Silver Cliff Tunnel Approaches Near Two Harbors, MNBy John Turner, James Lamb
The Minnesota Department of Transportation (MNDOT) has an extensive project to improve driving conditions and reduce hazards to motorists on US Highway 61 between Duluth, MN, and Canada along the nort
Jan 1, 1994
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Cosmar and BlastingBy Lee W. Saperstien
Section 709 of Public Law 95-87, "Surface Mining Control and Reclamation Act of 1977," requests the National Academy of Sciences to determine if the standards of the act are applicable to minerals oth
Jan 1, 1979
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How the Blasthole Burden, Spacing, and Length Affect Rock BreakageBy Norman S. Smith, Richard L. Ash
Relationships between the three design factors of borehole burden, spacing, and length that control rock breakage were examined by means of reduced-scale bench blasts in dolomite. A set of three indic
Jan 1, 1977
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Numerical Modeling of Oil Shale Fragmentation ExperimentsBy J S. Kuszmaul
The economic development of modified in situ oil shale retorting will benefit from the ability to design a blasting scheme that creates a rubble bed of uniform permeability. Preparing such a design de
Jan 1, 1985
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A Repumpable Emulsion for Use in Mines Subject to Afterblast Sulfide Dust ExplosionsBy Tom Medak, Don H. Cranney, G Paul McKay, R Douglas Reid
Explosive initiated afterblast dust explosions can occur in high sulfide ore mines when the flame generated by the detonating explosives ignites the sulfide dust produced from the blast, from previous
Jan 1, 1994
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Controlling Blast Vibration Effects with On-Site Analysis of Single Hole Signatures: "A New Approach"By Randall M. Wheeler
Computer analyses of single hole signatures are often used to help blasting operators predict the type of ground vibration effects that may be produced from production blasts incorporating various del
Jan 1, 1989
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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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Blasting-Induced Damage in CoalBy Kaby K. Kabongo
The paper is drawn from a project intended to explore a technique of prediction, control and optimization of fracture in coal induced by blasting. It evaluates the fines generated in coal submitted to
Jan 1, 1995
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Blasting Cost Minimization at Duvha OpencastBy S A. Steyn, I P. Douglas
Duvha Opencast is a large South African dragline operation supplying coal to the Duvha Power Station which is operated by Eskom, the state power utility. For Duvha to remain competitive with other col
Jan 1, 1991
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Blasting Damage Criteria for Low-Rise StructuresBy Kenneth Medearis
There is considerable evidence that more rational damage criteria need to be generated with regard to low-rise structures subjected to blasting vibrations. There is not sufficient basis for specifying
Jan 1, 1978
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Pattern Expansion Utilising Titan Red at Yarrie Iron Ore Mine in Western AustraliaBy Trevor Garbutt, Peter Bellairs, Jason Sander, Glenn Shaw
The Yarrie Iron Ore mine is located in the Pilbara region of Western Australia some 200km eastsoutheast of Port Hedland, the closest large regional centre. The mine is owned by BHPIO who has contracte
Jan 1, 1999
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Borehole Study of Precompression Resistance in Detonators and ExplosivesBy Joseph A. Sohara, John J. Mullay, Curtis J. Keefer, Robert L. Schrepple
The desensitization of an explosive column by the action of a previous detonation (adjacent borehole, deck or detonating cord) is a vital concern to the explosives industry. Previous reports to this s
Jan 1, 1990
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The Comminution Theory Applied to Rock BlastingBy Carlos Agreda
A general review of the comminution theory and also the general differential equation of the comminution are described, analyzed and discussed in order to be applied to rock blasting. Some size distri
Jan 1, 1994
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Safety of Ammonium NitrateBy Erik Nygaard
Ammonium nitrate (AN) is the main ingredient in most industrial explosives, but it is estimated that as much as 80-90% of the global annual production is used as fertilizer [14, 25]. Over the last yea
Jan 1, 2006
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Transient Data Analysis Procedure for Reducing Blast-Induced Ground and House VibrationsBy O E. Crenwelge
Seismograph measurements are usually made near blasting operations solely for the purpose of monitoring compliance with governmental regulations. However, recordings of seismograph signals have far gr
Jan 1, 1991
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Journal: Blast Vibration and Seismograph Section / Post Blast Assessment Using Blasting Seismograph DataBy Kenneth Eltschlager
Post-blast assessment techniques using off-site data which includes location, seismograph and photographic data were discussed during the Blaster’s Weekend at this year’s ISEE Conference. Blast and pr
Jan 1, 2007
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Utilizing European Magnetic Coupling of High Accuracy Detonator Technology in U.S. MinesBy Raymond M. Dixon, Dale L. Ramsey
Upon being introduced to the MAGNETIC COUPLING concept,Balsinger,Inc. wanted to conduct field trials to explore the potential of Magnetic Coupling in the U.S.. Although the Magnetic Coupling Concept h
Jan 1, 1990