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By C Robert Scott

Yes - We have figures on Explosives Manufacturers ! But, on the 500 or 600 explosives contractors, unless you happen to specialize in shooting oil wells, we have no numbers. As you know, the Insurance Industry lives on numbers, the larger the better. They collect the amount of premiums and losses on each line of insurance they write.

Jan 1, 1980

By Paul Downing

While safety and security have always been concerns of the U.S. explosives community, events throughout the world during the past few years have caused us to re-examine our industry’s potential vulnerability and change the way we do business on a day-to-day basis.

Jan 1, 2006

By Michael S. Wieland, Thomas C. Ruhe

Marginal detonation of explosives can produce more toxic fumes with higher nitrogen oxides (NOx) than normal detonation. In delay blasting, shock waves from borehole charge explosions can impact those delayed charges still remaining in the delay pattern. This can result in partial desensitization, whereupon the explosive does not misfire, but detonates in a weak unstable fashion releasing a different/unusual spectrum of gaseous reaction products.

Jan 1, 1991

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 Michael J. Sapko, Eric S. Weiss, Richard W. Watson

As part of the Bureau of Mines research into the hazards associated with the mining and processing of oil shale, experimental mine tests have been conducted to evaluate preferred combinations of explosives and inerting materials to prevent ignition of oil shale dust and mixtures of oil shale dust and methane.

Jan 1, 1989

By Earl Cook

With all our power and hope, we are part of the natural system and subject to its laws. As Francis Bacon pointed out long ago, we must understand those laws and "obey" them if we wish to "conquer nature." Bacon was saying that if we plan and engineer in compliance with nature's laws, we'll get a lot more out of the natural system than if we don't, because then we can use the system instead of fighting it.

Jan 1, 1979

By Willard Pierce

Very few people will consciously decide to do an unsafe act. With that said, how many of us unconsciously put ourselves in harms way, sometimes even on a daily basis? Complacency on the job may have very little to do with not caring or a poor attitude. It may be just as simple as failing to continue to recognize the hazards surrounding us throughout the day. At the very worst, it is both.

Jan 1, 2006

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 million tons of ore and powder factors ranging from .5 lbs/LT to .8 lbs/LT. Actual energy usage is compared to predicted energy based on the Bond equation.

Jan 1, 1997

By J Lyall Workman, Peter N. Calder

Flyrock can be a serious hazard associated with blasting. Many surface blasting accidents involving injury result from excessive flyrock beyond the protected blast zone. Numerous cases of equipment damage at the mine, quarry or construction site have resulted from flyrock. Fragments propelled beyond the property limits of the operation have also caused injury and damage.

Jan 1, 1994

By Dale Nies, David P. Childs

The open pit gold and silver mining operations in the State of Nevada have historically used simple row by row, echelon, or chevron delay patterns. Common practice has been to use detonating cord trunklines and either detonating cord downlines or nonelectric common in-hole delays in conjunction with surface delays. Several operations use a series of downhole nonelectric delays with an entire row loaded with the same delay to develop similar patterns.

Jan 1, 1991

By Thierry Bernard, Pierre M. Vuillaume, Michel Kiszlo

In the context of its studies for the french ministry of the environment and for the French national coal board, INERIS (the French institute for the industrial environment and hazards, formerly CERCHAR) has made a complete critical survey of the methods generally used to reduce the levels of blasting vibrations.

Jan 1, 1996

By Terry Matts, Henry Heidrich, Cluny Randell, Carl Kottmeier

Until 1990, all production of asbestos ore at Cassiar was by open-pit methods. With the impending exhaustion of open-pit reserves, a decision was made in February 1988 to continue mining underground, using the block-caving technique.

Jan 1, 1992

By Dave I. McGregor

The Multiple Raise Round Blasting Technique (MRRBT) is a safe, efficient, cost effective method of blasting thee will use existing mine personnel. The MRRBT, developed from the conventional 'drop raise method' style of blasting, can be used for most raise mining applications. Current results using MRRBT indicate no upper limit for the maximum length that a raise can be blasted.

Jan 1, 1994

By R M. Bhatawdekar, A I. Theresraj, H S. Venkatesh

Wadi Limestone Quarry is one of the largest captive mines of Associated Cement Companies Ltd, India. The mine management wanted to extend the excavation as close to the plant as possible for maximum exploitation of the deposit. The National Institute of Rock Mechanics and the management of Wadi Limestone Quarry carried out comprehensive investigations to evolve a methodology to control vibration and flyrock within safe limits.

Jan 1, 1999

By D Wilson, R R. Vandebeek, R A. Bowes

"As business opportunities are sought around the world, the explosives industry must oftengrapple with the United Nations Transport of Dangerous Goods Recommendations.Canadians have problems in this area that are similar to those of other countries. Thispresentation outlines, through a case study, how a container for shipping ""explosives"" wasdesigned, tested and approved for use by the Chief Inspector of Explosives, the""Competent Authority"" for Canada."

Jan 1, 1993

By Jeff Hermanson

Every construction project has site specific problems that need to be dealt with. These problems may be created by the geology, location, weather, time constraints, etc. Once these problems have been solved their solution often can be transferred to other similar construction sites. The Crazy Horse Memorial project is no exception.

Jan 1, 1996

By Jin Jingzhi, Wang Xuguang, Guan Li, Li Jianjin

Emulsion explosives are gaining a wider and wider commercial market and are displacing other composite slurry technologies. However, the grease-like state and essential thermodynamic instability of emulsion explosives cause inconvenience in production, transportation, storage and use and lead to gradual changes in performance. Emulsion powder explosives are designed to avoid these disadvantages. The formulation, process and properties of emulsion powder explosives made through a spin flash technology are described in this paper.

Jan 1, 1997

By Gerald R. Coonan

Early in the open session of the 1979 SEE Fifth Conference panel discussion, someone asked a question of the panel concerning the future intent of the Office of Surface Mining and the regulatory limits established for ground vibration and air blast. The "gist" of the question was: "What assurances do we have that OSM will not promulgate a limit of 0.5 inch per second ground vibration, or some other number within the next two years or so."

Jan 1, 1979

By William E. Hill

The blasting program at the Valdez Creek Placer Mine must deal with challenging situations throughout the year. During the short summer, extreme water conditions must be confronted, while the winter months present problems of a different nature, where the overburden freezes to a depth of up to 18 feet. These obstacles require techniques borrowed from hardrock blasting combined with creative experimentation to overcome.

Jan 1, 1994

By Roy Rose, Bruce Bowles, Wesley L. Bender

Numerous large diameter water wells are used to dewater the pit at the Sleeper Mine. Occasionally, a well will be located inside the boundaries of a blast. Although one might expect that wells so located would become inoperable due to blast-induced damage, in most instances this has not proven to be the case.

Jan 1, 1991