Search Documents

By Rahim G. Haghighi, Calvin J. Konya

Fragmentation is the fundamental concern of rock blasting and it measures the effectiveness of blasting. Fragmentation is sensitive to not only the interrelationship among the design variables, but also is sensitive to local geology. Local geologic conditions have a significant impact on the success of a blasting operation.

Jan 1, 1986

This paper discusses development, test data, field trials, performance, application and possible economics of high-energy blasting agents fueled with Nitropropane that can be bulk loaded into downholes or packed into waterproof packages at densities between 1.10 and 1.25 gm/cc and that yield calculated detonation pressures of 50 kilobars in small diameters to 100 kilobars in diameters over six inches. Using high-density nitrate, downhole densities of over 1.4 have been attained in field trials with correspondingly high calculated detonation pressures.

Jan 1, 1977

By Paul Muehl, Roger Lawrence

The massive sculpture taking place on Crazy Horse Mountain in the Black Hills of South Dakota, may Be the most unique application of precision blasting techniques in the world today, It is certainly the largest sculpture in history. And it is being carved not by the usual artist implements, but by engineering of explosives. This paper presents a review of the blastingasting techniques and challenges of blast earring the largest sculpture in the world,

Jan 1, 1991

By A Lance McAnuff, Marcus V. van Bers, Andrew Curic

During the summers of 1992 and 1993, blasting operations were carried out to effect the crossing of two of Canada's better known game rivers, the Nipigon and Winnipeg, in connection with the completion of a third natural gas utility across north-western Ontario. The Nipigon River, crossed in 1992, involved a single fast-flowing channel while the Winnipeg River, crossed in 1993, involved three separate channels.

Jan 1, 1994

By Byron Groen, Corry Goumans

Description of Project: Project location is at WAC Bennett Dam in Hudson’s Hope, British Columbia, Canada.

Jan 1, 2014

By Lawson J. Taylor, Paul N. Worsey

Recent reputable evidence conclusively indicates that conventional chemical delay elements in delay detonators are notoriously inaccurate and can thus seriously affect blasting efficiency.

Jan 1, 1983

By K A. Broadhurst

Over the years International Standards have produced and are continuing to work on documents related to damage from blasting and human exposure to whole-body mechanical vibration and repeated shock.

Jan 1, 1988

By Thomas P. Dowling

With the increased usage of AN/FO type blasting agents and the introduction and development of non cap sensitive slurries, water gels and other types of blasting agents, proper initiation and boostering of these insensitive materials has become a most important aspect of every blasting operation.

Jan 1, 1981

By Mark Bauckman

Discussion Topics • Market Needs • Technology Developments & Best Practices • Industry & Government Developments • Future Possibilities & Your Role

Jan 1, 2006

By Heins Walter Wild

Detailed investigations on various configuration kinds of cut with respect to drilling-technological and blasting-technological properties as well as with respect to cost effectiveness have been carried out in Germany.

Jan 1, 1995

By Gungor Tuncer, Ali Kahriman

"In bench blast design, not only the technical and economical aspects, such as block size, uniformityand cost, but also the elimination of environmental problems resulting from ground vibration and airblast should be taken into consideration."

Jan 1, 1999

By Salah A. Taqieddin

In an open pit, or a quarry blasting operation, a muck pile of broken material of given size and quantities suitable to a load/hauling system is normally created at the foot of a bench. Fragmentation can be used to evaluate the efficiency of that blast configuration.

Jan 1, 1987

By Miles Huntly

This paper will discuss the ideas and actions that led to the development of a Drill Improvement Team at an open cut coal mine in Australia. It will show significant cost savings can be attained by forming a focused Team derived from all the participants that go into drilling a blast hole

Jan 1, 1999

By Thomas L. Barkley, Steve Salli

In the past, blasters have attempted to evaluate the results of their blast designs and make corrective adjustments to improve the blasts' productivity and value to the mining operation. The methods employed have nearly always been "eyeball" evaluations and "trial and error" corrections.

Jan 1, 1997

By Joe Dannenberg

A word of preface: The material contained in this talk is not completely original. Many thoughts and actual words come from a fine little book called "1,000 Years of Explosives" by William S. Dutton. The book is now out of print, but if there is enough interest shown by this Society, perhaps we can have it reprinted.

Jan 1, 1980

By Robert G. Lundquist

This paper is a brief summary of work done on mining applications of high energy projectiles. Full scale field testing already completed has used cannons to drive a tunnel, drill large diameter holes, do secondary breakage in an open pit mine, and scale loose rock from inaccessible pit walls. Other applications are suggested in driving development openings, particularly raises. The method will be economically feasible only if cheap liquid propellants are developed.

Jan 1, 1977

By Donald J. Westmaas, Fred C. Drury

The Great Lakes Region, in the states of Illinois, Indiana, Michigan and Ohio, uses approximately 14% of the explosives annually consumed in the United States. While materials being blasted differ widely over this geographical area, a basis of comparing practices is proposed and evaluated.

Jan 1, 1979

By J Lyall Workman

This paper examines the comparative economics of cast blasting to alternative stripping techniques. There are several scenarios where a mine may consider introducing cast blasting. However, there are other alternatives such as adding dragline capacity or introducing a prestripping operation. The question becomes which alternative will be more economical.

Jan 1, 1998

By Eric R. Achelpohl

The paper follows the introduction of a college student into the explosives industry. The opportunity of experiences from classes and work at the University of Missouri-Rolla, along with summer internship experiences are highlighted.

Jan 1, 1998

By Jack Eloranta

To improve control of blasting, tests were performed to assess non-electric cap accuracy. Simultaneous testing using a Velocity of Detonation Recorder (VODR), Red Lake LoCam and an Instantel DS-677 blast monitor was done. Favorable comparisons were found in the three records. This testing confirmed the accuracy of an inexpensive and expedient cap testing procedure.

Jan 1, 1992