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  • ISEE
    Fragmentation of Sandstones and Quartzites

    By Lewis L. Oriard

    Some two million cubic yards of sandstone and orthoquartzite were blasted and excavated at Upper Stillwater Dam, located high in the Uinta Mountains in northern Utah. The material was processed to pro

    Jan 1, 1993

  • ISEE
    Gulf Slurry Products and Their Uses

    By Charles B. Ingram, Neil E. Gehrig

    The development of water gel explosive products has been the single most important development in explosive research and development since the invention of nitroglycerine and dyne-mite many years ago.

    Jan 1, 1977

  • ISEE
    Flyrock Revisited: An Ever-present Danger in Mine Blasting

    By Harry Verakis, Thomas Lobb

    A great deal of information has been presented and published on the danger from flyrock created from blasting operations. The creation of flyrock is not specific to any one blasting operation. Flyrock

    Jan 1, 2007

  • ISEE
    Angle Drilling and Blasting Procedures Martin Marietta Aggregates

    By Michael E. Kovach

    This discussion is an overview of an approach to drilling and blasting angle holes at Martin Marietta Aggregates. Method of determining burdens, hole depths, angle settings and explosive selection wil

    Jan 1, 1992

  • ISEE
    Test and Study on Hard Rock Blasting in Drift-Pilot of Qinling Tunnel

    By Qi Jingyue, Wang Zhongquian, Yang Nianhua

    Qinling Tunnel is the longest tunnel in China. The rock stratum is very hard rock - intact mixed gneiss. At the beginning of the construction, drift-pilot excavation is very costly due to the use of r

    Jan 1, 1998

  • ISEE
    Cast Blasting Around Town

    By Jeff Wachendorf

    As the title "Cast Blasting Around Town" implies, this paper details the starting of a cast blasting program in and around the town of Colstrip, Montana. As strip ratios have increased, the need to ad

    Jan 1, 2009

  • ISEE
    Blind Hole Raise Blasting at the Homestake Mine

    By Justus Deen, Paul V. Sterk

    Through the 119 year history of the Homestake Mine various methods of raise mining have been used, these include conventional, bored, and drop raises. These raises provide passage for men and supplies

    Jan 1, 1996

  • ISEE
    Amplitude and Frequency Variation of Vibration Wavelets Associated with Overlapping Wave Trains

    By Edward J. Walter

    A vibration record is a complex of motions resulting from a combination of direct, reflected and refracted seismic energy that originated at a blast source. Multiple hole blasting using delays further

    Jan 1, 1989

  • ISEE
    Small Scale In-Rock Precompression Testing: Effects of Delay Timing

    By J J. Mullay, G W. Anderson, C J. McFinley, J F. VanNorman, C J. Kefer

    Previous work has shown that testing of precompression effects conducted on a small scale under simulated field conditions in actual rock provides a reasonable model for the evaluation of explosives a

    Jan 1, 1994

  • ISEE
    Drilling and Blasting in Thick Seam Coal Mines in the Powder River Basin

    By Denard A. II Brandt

    Today I would like to share with you some blasting practices used in the thick coal seam mines of Northeastern Wyoming. I will begin by giving you a general overview of a thick seam coal operation at

    Jan 1, 1984

  • ISEE
    On the Development of Explosion Technology in Seoul Metro-Subway Construction

    By Ginn Huh

    The blasting work to construct a subway in Seoul, Korea have often caused increased neighbor’s complaints because of ground vibration. In order to prevent the damage to the structure, it was necessary

    Jan 1, 2000

  • ISEE
    Blast Vibration Wavefront Reinforcement Model

    By Adrian J. Moore, Alan B. Richards, Rob Evans

    Air and ground vibration from blasting is influenced by the delay pattern that is used. Wavefronts from blastholes fired in a blasting pattern can combine in certain circumstances to give increased bl

    Jan 1, 1994

  • ISEE
    Numerical Modeling of Oil Shale Fragmentation Experiments

    By 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

  • ISEE
    The Safe Elimination of Buried Explosives Near Gillette, Wyoming

    By William H. Snyer, Victor A. Sterner

    A cache of buried explosives was discovered by ICI Explosives, USA Inc. at one of their sites near Gillette, Wyoming. An intensive investigation conducted by ICI management indicated that nitroglyceri

    Jan 1, 1997

  • ISEE
    Effect of Fragmentation on Loader Efficiency

    By David Willock, S. Singh, Michael Glogger

    The efficiency of the loading system in a mine depends upon the characteristics of the muck pile, the loading machine specifications and the loading practices. The focus of this paper was to look spec

    Jan 1, 2001

  • ISEE
    Explosion Bonded Electric Products and Explosion Cutting of Retired Nuclear Installations Pipes

    By Hu Wenjun

    This paper changes the section of copper of copper to aluminum adapter bar into aluminum plate covered one face or double face with copper coat, and changes the conductor material of knife switch, fus

    Jan 1, 2000

  • ISEE
    Blast-Induced Rock Fracturing and Minimizing Downstream Comminution Energy Consumption

    By Farshad Rashidi Nejad, Ali Asgari, Sanaz Norouzi

    Blasting is known as the first step of rock breakage in mines. An indication of the importance of blasting is that more than 1 billion kg (2.2 billion lb) of explosives are used annually in Australia

    Jan 1, 2015

  • ISEE
    The Effect of Available Energy on Blast Design

    By Lyall Workman, P D. Katsabanis

    Energy released by the explosive is typically partitioned in brisance, heave and losses. The fact that energy released in the P-V expansion curve below a certain point is lost has resulted in the conc

    Jan 1, 1998

  • ISEE
    Large Hole Presplitting with Modified Air Gap Blast Designs in Weak Rock

    By Larry R. Fletcher, Virgil J. Stachural, Matthew N. Plis

    The Bureau of Mines is conducting research on blasting methods that reduce highwall overbreak and the associated rockfall hazards. This paper presents the results of a series of tests to improve presp

    Jan 1, 1991

  • ISEE
    Explosives Malfunction in Decked Blasts

    By Robert Lee, Jay Rodgers, Kirk Whitaker

    The time domain during which an explosive detonates and causes rock to fragment and displace is on the order of tens of milliseconds. Because of this, the dynamic processes that occur during this time

    Jan 1, 2000