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Cost Effective Loading of Large Diameter Pre-Split Holes
By LaRay Collyer
San Juan Mine began pre-splitting the highwall prior to cast blasting in August 1986. The first pre-split shot used six inch PVC (polyvinylcloride) pipe inside a 10 5/8 inch hole, drilled at a 74 degr
Jan 1, 1990
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Non-Electric Sequential Blasting for Open Pit Mining Application
By C A. "Hawk" Hanger
"The paper that will be presented is an in-depth study of sequential blasting using standardnon-electric shock tube down hole timing along with surface M.S. connector timing.Included also will be a di
Jan 1, 1993
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Blasting with ANFO/Poylstyrene Mixtures
By Karl Kure, Anders M. Heltzen
Mixtures of prilled ANFO and 0,5 - 3 mm polystyrene balls are interesting substitutes to the tube charges or other types of reduced explosives or detonation fuses. Experiments have shown detonation ab
Jan 1, 1980
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Fragment Size Distribution Assessment Using a Digital Image Based Measurement System
By Mark S. Stagg, Stephen A. Rholl, Steven G. Grannes
A method of determining the fragment size distribution of rock quarry muckpiles using photographic and digital-image processing techniques has been developed by the Bureau of Mines. To assess the frag
Jan 1, 1993
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Evaluation of Propagation Sensitivity of Commercial Explosives in Large Diameter Holes
By RR Vandebeek, A W. Bauer
The Canadian Explosives Research Laboratory regularly evaluates the properties of commercial explosives for authorization under the Canada Explosives Act. Propagation sensitivity is normally measured
Jan 1, 1987
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Iron Ore Company of Canada (IOCC) Blast Optimization with Emulsion Explosives
By M Lemieux, R Mason
The SABREX blast modeling program was introduced to I.O.C.C.'s Carol Lake Iron Ore Project in December 1987. As part of CIL's Technical Services, SABREX was used to implement an optimization program d
Jan 1, 1989
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Harlan Diversion Project Upstream Portal Blasting
By Paul Ross, Harry Burchett, Lou Case, Calvin J. Konya
"The Cumberland River in Harlan, Kentucky has flooded the town for numerous years. TheU.S. Army Corps of Engineers funded a project to divert the river. The project consisted oftunneling through a mou
Jan 1, 1993
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Attenuation of Blasting Vibrations in South Florida, Part II
By Greg Mclellan, Mark Johnson, John Pepper
In this paper, the measured vibrations are plotted in terms of the individual PPV components versus Scaled Distance (SD) on logarithmic scales. The maximum PPV is pIotted on a separate graph and equat
Jan 1, 2001
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Utilizing the Pre-Blast Survey as a Vehicle to Promote Good Public Relations - A Case History
By Wesley L. Bender, James E. Murray
Pre-blast surveys are often conducted solely to document existing structural conditions and uncover potential problem areas. This paper presents a case history where the pre-blast survey was also used
Jan 1, 1988
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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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Blasting Parameters for Concrete Fly-Overs
By Bob de Raadt
The main problem in blasting a fly-over spanning a main road is the brief time available for blasting and the removal of the debris, in order to minimize the ensuing traffic disruption in the public h
Jan 1, 1984
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Pre-Controlling Blast Site Safety to Ensure Profitability
By S. J. Dillingham
One of the primary goals of every blaster is to achieve the optimum blast design. Too much focus on efficient design, however, can cloud certain issues and exposures that must be addressed if the enti
Jan 1, 2002
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Calculation of Rock Motion During Bench Blasting
By Elaine Gorham-Bergeron
CAROM is a distinct element, dynamic code developed at Sandia National Laboratories to calculate the motion of rock fragments during blasting.[1] It has recently been improved to incorporate a mechani
Jan 1, 1987
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Fragmentation and Throw due to Blasting – Role of Initiation Systems
By K. Ram Chandar, Vedala Rama Sastry
Fragmentation and muck pile profile together play an important role in optimizing the excavation costs for given geo-mining conditions. Initiation system is one of the vital parameters influencing the
Jan 1, 2008
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Electronic Detonator Success: An African Story
By William McFerren, Pragasen Moodley
In contrast to global trends, African, especially South African, surface mining operations have shown a significant rate of adoption of Electronic Detonators (ED’s) over the last few years. Proven ben
Jan 1, 2004
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The Effect of Low Level Blast Vibrations and the Environment on a Domestic Building
By Rob Farnfield, Mike Kelly, Toby White
There are a variety of sources of dynamic stress which can affect a building and give rise to cracking. A two-storey house, situated in the middle of a surface coal mine was monitored for a period of
Jan 1, 1993
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Bridge Demolition without Disruption of Railroad Traffic: A Case Study
By Calvin Konya, Janos Foldesi
A bridge over a main line railroad system was scheduled for demolition. The bridge was made of reinforced concrete and spanned three mainline railroad tracks which could not be shut down due to blasti
Jan 1, 1992
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Customer Site Safety at Orica
By Frank Barker
Mining operations present a very different environment to the suppliers of explosives, initiating systems and services, both on surface and underground. Typical hazards include underground movement, a
Jan 1, 2000
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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
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Inexpensive Micro-Computer Digitizer and Response Spectrum Analyzer
By Herve Duplaine, Charles H. Dowding
Calculation of response spectra for blast induced vibrations is necessary to fully understand and in some instances comply with frequency or distance related safe blasting criteria. Fortunately, micro
Jan 1, 1984