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Shock Pressure Transmission Characteristics in a Granitic Rock due to Calibrated Explosive Loads
By Rakesh Raghavaraju, Bibhu Mohanty
The paper analyzes the decay of shock pressure as a function of distance from the borehole, and its implication on shock-induced fracture properties of the target rock as the first step in predicting
Feb 1, 2020
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Blasting at Dacotah Cement
By Lyle Dennis
Emphasis on increased production while maintaining rigid quality standards has necessitated a change in blasting technology at Dacotah Cement's limestone and gypsum quarries. The following three metho
Jan 1, 1996
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The Role of Position of Initiation and Stemming on Breakage
By Zvonimir Ester
The course of motorway tunnel under construction was set only 2 m away from the main motorway. The thickness of the tunnel overburden rock was 9 m. During the tunnel construction the traffic on the mo
Jan 1, 1998
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Improving Productivity at Farco Mining of Texas Using Emulsion/ANFO Blends
By Nick Lewis
Farce Mining of Texas is a surface coal mine located in Laredo, Texas. Farce mines and sells approximately 600,000 tons /year of bituminous coal. A map showing the location of Laredo is provided in F
Jan 1, 1994
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Effect of Explosive Charge Geometry on Shock Wave Propagation
By Martin Langenderfer, Catherine Johnson, Phillip Mulligan, Kelly Williams
The physical geometry of a charge has a direct correlation to the geometry of the shock wave. This relationship appears strongest within the boundaries of the visible fireball. As the shock wave propa
Jan 1, 2018
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More Efficient Use of Your GPS
By Wes Bender
Considering the current interest in Global Positioning System (GPS) usage, it might be timely to look at a more efficient means of utilizing these instruments. The GPS system currently utilizes 28 sat
Jan 1, 2002
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Critical Analysis and Technical Support for Assessment of Construction Blasting Damage Claims
By Russell D. Melton, Gary A. Kanelos
A construction company performed blasting operations to break up limestone bedrock for excavation of residential basements. The owners of an existing residence located approximately 400 feet from the
Jan 1, 1996
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Back to the Basics: Electronic Detonators
By Larry Schneider
In recent years, many individuals looking into the future of the blasting industry have predicted that the most likely next technological breakthrough would be the use of high precision, digitally con
Jan 1, 2006
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Large Hole Rotary Drill Performance
By J Lyall Workman, Peter N. Calder
"Large hole rotary drilling is one of the most common methods of producing blastholes in open pitmining. Large hole drilling generally refers to diameters from 9 to 17 inch (229 to 432 mm), however ac
Jan 1, 1996
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Explosive Methods of Entry for Law Enforcement Tactical Operations
By Charles O'Connor, Ben Tisa
International Training Resources is a company consisting of personnel with extensive law enforcement and military special operations experience, The staff members are qualified to train and certify, a
Jan 1, 2000
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Selection of Powder Factor in Large Diameter Blastholes (9dd28d4c-e692-46ff-9e71-b2043e0b42a0)
By Jack Eloranta
This paper documents the relationship between material handling and processing coete compared to blasting cost. The old adage, "The cheapest crushing is done in the pit", appears accurate in this c!as
Jan 1, 1995
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Blasting to Reduce Ore Dilution - Are You Kidding?
By Brad Bulow
Blasting is an essentially violent process aimed to disrupt and loosen rock for productive excavation. Some dilution of any ore present is the inevitable result. This makes blasting a dirty word to mo
Jan 1, 2000
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New Training Technologies (Interactive Video)
By Roger Scarr, Richard A. Walker
Interactive video is the combination of computer and laser disc -technologies that allows for the storing of 54,000 single images or 30 minutes of video with the ability to access any segment or singl
Jan 1, 1990
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Semiconductor Bridge (SCB) Research and Development
By C B. McCampbell, R W. Jr Bickes
Sandia National Laboratories has developed a semiconductor bridge (SCB) igniter for the ignition of a variety of explosive materials. When subjected to a low-energy current pulse, the bridge bursts in
Jan 1, 1991
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Underwater Explosions Part 4. Signal Damping
By M. Hagfors
On the underwater testing of explosives, the measuring system consists of water filled test pond, tourmaline based pressure sensor, measuring cable and measuring unit, which supplies the DC current to
Jan 1, 2006
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Drawbacks of Blast Vibration Regulations
By Mark Svinkin
The purpose of this paper is to present an overview of recommended existing criteria of ground vibrations generated by blasting. It is shown that these criteria have limited liability because they wer
Jan 1, 2003
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Relating Horsepower to Drilling Productivity (83232d04-da2e-4755-9f53-c779d17429d0)
By Brian Wingfield, Greg Williams, Richard W. Givens
Application of required energies into the rig design can have a dramatic impact upon productivity. Computer modeling of these production variables has led to changes in design with values closely appr
Jan 1, 1995
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Laser Based Slapper Detonator: The Next Generation
By Dennis L. Paisley, Thomas P. Turner
Laser slapper detonators are the next generation detonator under development at the Detonations Systems Group at Los Alamos National Laboratory and function very similarly to an electrical slapper. A
Jan 1, 1994
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Highway Lane Rental Requirement Compromises Blast Site Safety and Security
By Harry L. Siebert
A major Arizona highway project is jeopardizing site safety and security because of the lane rental policy. One million cubic yards of rock must be fragmented to provide two additional lanes parallel
Jan 1, 1997
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Water Overpressure Monitoring during an Arctic Winter
By Jeff Peterson, Alastair Grogan
During the winter of 2001/2002, a number of seismic exploration projects were carried out in the Mackenzie River Delta area of the Northwest Territories, in Canada. The purpose of the seismic projects
Jan 1, 2003