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Blasting Techniques to Control Roof Failure in an Underground Limestone Mine
By Mike Koehler
An underground mine that produces aggregate limestone was in operation for approximately eight years when geological changes resulted in dangerous rock falls. The roof in the mine was not bolted; ther
Jan 1, 2002
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Determination of Flying Distance of Pieces in Demolishing Blasting
By Zhang Qi
For the most part, the flying piece is serious endangerment in the demolition blasting. To prevent the endangerment, a large number of materials are needed as the protection. Therefore, the determinat
Jan 1, 1994
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Experimental and Numerical Studied of Transient Shock Wave Propagation in a Geomedium
By Keith Orgeron, Tibor Rozgonyi, Graham Mustoe, Vilem Petr
This paper presents the results of an experimental and numerical investigation of the shock wave energy transmission and reflection through boundary layers (joints, fractures) or between inhomogeneous
Jan 1, 2002
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Effect of Joint Separation and Filling on Pre-Split Blasting
By Shijie Qu, Paul N. Worsey
Pre-splitting has become widely adopted for the formation and protection of final surface rock excavation profiles in both large scale civil construction and highway rock cuts. Jointing has been shown
Jan 1, 1987
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Observation and Numerical Simulation of Fly Rock caused in Bench Blasting
By Kunihisa Katsuyama, Yuji Ogata, Yuji Wada
Test blasting was carried out to study the flying characteristics of rock mass caused in bench blasting. The quantity of explosives was increased from 7.6kg to 9.1kg and the Minimum burden was changed
Jan 1, 1997
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Computer Based 3-D Blasting Analysis System
By S Burchell
During the past few years, high-speed cameras, laser surveying equipment and photogrammetry have become standard tools for recording blast geometry and results. While laser profiling yields accurate 3
Jan 1, 1992
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Explosives Selection to Minimize the Risk of Dust Explosions in Underground Mines
By Q Liu, P D. Katsabanis
Dust explosions in underground sulphide and oil shale mines result from the detonation of explosives in the blasting operations. Explosive composition, oxygen balance, priming and ideality of detonati
Jan 1, 1991
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The Waiting Time Recovery Test
By John T. Aler
The U.S. Bureau of Mines has been studying the problem of why explosives detonate weakly or misfire during blasting in underground coal mines. Cross-borehole shock wave interaction has been identified
Jan 1, 1991
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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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Pressure Irregularities in the Loading of Vehicles by Buried Mines
By Leslie Taylor, W. L. Fourney, Uli Leiste
Over the past few years, our laboratory has been investigating the loading on vehicles due to the detonation of buried explosives. We have been using target plates to represent the bottom of the vehic
Jan 1, 2008
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The Application of Transfer Functions in the Prediction of Structural Response to Blast Induced Ground Vibration
By Robert A. Farnfield
This paper outlines the theory behind transfer functions and illustrates their application in the prediction of structural response to blast induced ground vibration. The ability to predict the respon
Jan 1, 1994
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Computer Cast Blast Modelling
By Mike McGill, Stephen Chung, Dale S. Preece
Cast blasting can be designed to utilize explosive energy effectively and economically for coal mining operations to remove overburden material. The more overburden removed by explosives, the less bla
Jan 1, 1994
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Recent Developments in the Application of Hercudet to Surface Mining, Quarrying, and Coal Stripping
By Robert B. Hopler
The Hercudet™ non-electric delay blasting cap system has exhibited outstanding performance and economic results in surface work. The versatility inherent in the system, which allows the combining of t
Jan 1, 1978
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Magazines -- Current Regulations & Common Sense
By Paul E. Thompson
Current magazine regulations are designed to avoid injury or property damage caused by accidental detonation as well as to store explosives securely. The primary emphasis appears to be the avoidance o
Jan 1, 1990
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Modeling Coal Seam Damage in Cast Blasting
By 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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Using Dry ANFO in the Pacific Northwest Rainforest: Washington State
By William C. Lane
The Pacific Northwest has an abundance of seamy, coarse granite and basalt rock. It is used primarily for road construction. Small quarries are opened nearest the road work to cut the cost of hauling.
Jan 1, 1986
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The Application of GPS Positioning and Drill Monitoring Technology
By Carl Hendricks
AQUILA Mining Systems Ltd. is the world leader in drill monitoring, control and GPS based drill navigation systems for the mining industry. This paper will review the general design and application of
Jan 1, 2002
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Improvements in Blasting Technology at Cliffs Natural Resources
By Scott Giltner, Allan Koski
Blasting is one of the lowest cost yet most critical parts of the mining cycle. This paper discusses the findings of an audit conducted on the blasting operation at an iron ore mine. The purpose of th
Jan 1, 2009
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The Efficiency of Blasting Versus Crushing and Grinding (b74142ad-057d-4d47-8cdb-a72f6046d338)
By Jack Eloranta
This paper compares energy requirements for blasting, crushing and grinding. By tracking electrical consumption for various powder factors, a general trend has appeared. This study involves over 100 m
Jan 1, 1997
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Why the 8MS Rule Doesn’t Work
By D. Bartley, R. McClure, W. Reisz
Ever since the 8ms criterion was developed in the early 60’s there has been an ongoing debate among many blasters as to its actual value in controlling ground vibration. The perpetuation of the myth s
Jan 1, 2006