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Application of Full-Face Round by the Sequential Blasting Machine in Tunnel Excavations
By Young-Dong Cho, Han-uk Lim, Bok-Ki Park, Sang-Eun Lee
Many methods and techniques have been developed to reduce ground vibrations. Some of them are an adoption of electric millisecond detonators with a sequential blasting machine and an improvement of in
Jan 1, 1995
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Earth Motions Resulting from Large Distributed Chemical Explosive Detonations
By D Maxwell Ellett
This report presents an evaluation of knowledge concerning a process used in predicting ground motion resulting from large scale conventional explosive detonations, The shots were set off in Arizona i
Jan 1, 1976
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Benefits of Hercduct in Construction Blasting
By Thomas C. Jones
The purpose of this paper is to disseminate new information for nonelectric blasting in trenching and construction work. The presentation is not designed or intended to discredit conventional electric
Jan 1, 1984
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Methods of Evaluating Exploxive Reactivity of Explosive-Contaminated Solid Waste Substances
By Richard J. Mainiero, T S. Bajpayee
The Bureau of Mines, U.S. Department of the Interior, has developed test procedures and criteria for evaluating explosive reactivity of explosive contaminated solid waste substances generated by U.S.
Jan 1, 1988
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Isee Photography In Blasting Session
By T. Palangio
Most blasters wouldn’t think of initiating a shot without a seismograph to record vibration and air blast results. Some might even measure the velocity of detonation but few surprisingly record the ev
Jan 1, 2008
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The Measurement of Detonation Waves in Composite Explosives
By C De La Cruz
The use of a thin-film piezoelectric stress gauge to determine the pressure profile in a detonating explosive has been demonstrated. These PVDF gauges have measured, in the borehole, the Chapman-Jouge
Jan 1, 1997
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The Largest Rock Fill Dam in the United States
By L. L. Oriard
he Metropolitan Water District of Southern California (MWD) supplies water to some 16 million people in a semi-arid region. Most of this water is imported. Some of the supply lines cross over the San
Jan 1, 2000
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An Analysis and Prevention of Flyrock Accidents in Surface Blasting Operations
By Thomas E. Lobb, Harry C. Verakis
Blasting is a primary means of extracting minerals and ores at surface mining operations. The domestic consumption of explosives and blasting agents during the year 2001 was about 5.25 billion pounds.
Jan 1, 2004
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Firing Accuracy of Electric Detonators
By Richard J. Mainiero, T S. Bajpayee
The U.S. Bureau of Mines (Bureau) has conducted research to evaluate the firing accuracy of electric delay detonators used in surface blasting operations. Over four billion pounds of explosives and bl
Jan 1, 1990
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PPV. SD. Really? Still??
By Doug Anderson
Two quantities, Peak Particle Velocity (PPV) and Scaled Distance (SD), have controlled aspects of many blasting projects and operations for a long time. Vibration criteria typically use both PPV and S
Jan 1, 2018
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Longer Delay Periods Reduce Rockfall Hazard at a Contour Mine
By Virgil J. Stachura, Larry R. Fletcher
The Bureau of Mines conducted a series of delayed blasting experiments at a West Virginia contour coal mine which resulted in smoother highwalls. The highwalls were smoother due to reduced overbreak a
Jan 1, 1985
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Underwater Blast Pressures from Confined Rock Removal Shots The Kill Van Kull Deepening Project
By Thomas M. Keevin, Gregory L. Hempen
A study was conducted to measure underwater pressures associated with confined borehole shooting used to remove rock for The Kill Van Kull Deepening Project, U.S. Army Corps of Engineers, New York Dis
Jan 1, 2005
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Oil Shale Blasting Simulations Employing State-of-the-Art (2006) Computer Hydro-Codes and Constitutive Models
By Dale Preece
In the late 1970’s and early 1980’s substantial resources were devoted to research focused on producing oil from the vast oil shale reserves in the western United States. Since the oil is solidified i
Jan 1, 2007
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Finite Element Simulation of Time-Dependent Fracture and Fragmentation Processes in Rock Blasting
By M Oldenburg, P J. Digby, L Nilsson
A constitutive model for the simulation of fracture and fragmentation processes in rapidly loaded rocks is studied. The model was included in a wave propagation finite element code. The results obtain
Jan 1, 1985
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The Application of Likelihood Ratio Test to Blast Vibration Analysis
By W. J. Birch
The dedicated documenting of blast design and vibration monitoring results forms part of the best practice methodology for today’s blasting operators. This allows regression curves to be constantly up
Jan 1, 2004
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Electronic Detonators - Do They Add Value?
By TA Louw, Dr CM Lownds
In an era where profits are constantly being eroded, mines are looking towards technology developments to assist them in solving mining problems and reducing mining costs. An emerging technology that
Jan 1, 2004
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Source Scaling of Single-Fired and Delay-Fired Explosions Constrained by In-Mine and Regional Seismograms
By Brian Stump, D. Craig Pearson
This work quantifies seismic coupling as a function of charge weight for single-fired (simultaneously detonated) explosions observed in the mine and at regional distances. These single-fired explosion
Jan 1, 2002
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Pressure Effects on Density of Small Diameter Explosives
By R Deshaise, B Mbhanty
The importance of controlling density of commercial explosives, and the various means to achieve it are described. m e field conditions responsible for density changes during blasting and their effect
Jan 1, 1989
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Engineering Investigation of the April 2011 Explosion at a Fireworks Storage Magazine in Oahu, HI
By Zuhair Ibrahim, Dan Tillema, Ali Reza
This paper details the investigation of a fatal explosion that occurred on April 8, 2011 at a magazine used to store fireworks in Waikele, HI. The fireworks had been confiscated by the Bureau of Immig
Jan 1, 2014
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Transient Vibration and Complaints an Emperical Study of Coal Mine Detonation
By Gerald R. Coonan
Laboratory research is being conducted to substantiate suggested levels for voluntary standards on human response to transient vibration. The application of those findings to actual field conditions,
Jan 1, 1982