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By Lyle Avey

For the purpose of this paper, testwork and general pre-splitting practice will be discussed for the Chimney Creek Mine.

Jan 1, 1990

By Alan R. Gadberry

Good mine planning is critical to the success of a safe, cost effective mine. Many factors contribute to the overall success of an open pit mining operation: proper pit location and development, good drilling and blasting practice, and well conceived short range and long range mining plans.

Jan 1, 1981

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 Weyman CT Ngain, Brian J. Kennedy

Innovative chemically sensitised bulk emulsion explosives and pump delivery systems have provided contractors participating in the highly competitive Hong Kong underground construction market with a safer and more cost effective approach to loading explosives.

Jan 1, 1997

By Peter P. Harvey

The Nonel Primadet is a non-electric delay blasting cap initiation system. The most recent field application of the system in the Southwest has been at the Magma Superior Mine, Superior, Arizona.

Jan 1, 1978

By Gary B. Hemphill

Estimators will agree that estimating for excavation is the most difficult costing task. Equipment costs and production rates are the toughest to determine. The following illustration is a method that can be used for this determination.

Jan 1, 1976

By Isaac E. "Chip" Harris

A general understanding is given to how and where blast hole drills are used and what recent developments have taken place with small and large diameter drill hole machines. Indications are that new developments with high penetration rates and large diameter holes are not necessarily the answer to increased production in the field.

Jan 1, 1979

By Brett Pielstick, E Emery Gray

"Construction of the new Acosta Bridge in downtown Jacksonville, FL required the removalof an historical center lift span bridge once one_half of the new bridge had been opened totraffic. This paper discusses the potential problems faced with the demolition phase of the projectas observed by the CEI (Construction Engineering Inspection) and the blasting consultants"

Jan 1, 1993

By Edward J. Jr Walter

This paper discusses the use of slant hole drilling and water matting as an effective method of reducing costs in shaft sinking operations through a general review of cost priorities for the contractor.

Jan 1, 1976

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 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 Larry R. Fletcher

Excessive flyrock, which is blasted rock that travels beyond the secured blast area, is responsible for 25 pct of the blasting injuries that occur in surface mining. Excessive flyrock is also a frequent cause of damage to mine equipment and facilities.

Jan 1, 1986

By C H. Dowding, P W. Linehan

Many of the technical and non-technical or human problems associated with blasting can be minimized through a proper preconstruction test-blast program.

Jan 1, 1986

By T S. Bajpayee, Thomas C. Ruhe

"The Pittsburgh Research Laboratory of NIOSH conducted research to determine the safe operatingconditions for using recycled (used) lubricating oil from mining equipment as a partial replacement for diesel fuel to make ANFO-type blasting agents. The use of recycled oil (RO) conserves energy, reduces oil imports, and reduces mining costs."

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 M Dale White

Captive insurance companies have recently been discovered by risk management experts as a risk transfer vehicle and are very much in vogue. Actually, captive insurance companies are not a new phenomenon. Centuries ago, the first insurance organizations were what we today refer to as group or association captives. Early traders banded together to share the risks of ocean shipments writing ocean cargo coverage, the oldest form of insurance.

Jan 1, 1980

By Steve Dillingham

In recent years, there has been a trend toward increasingly demanding blasting standards being enacted by local and regional regulatory authorities. The objective of this paper is to alert blasters of the difficulties that are created for blasting projects as a result of these restrictions, as well as the steps that can be taken to minimize future conflicts.

Jan 1, 1995

By Peter Bellairs

It is generally expected that drilling and blasting be a routine part of a mining process where the blastholes are drilled, left for a period of time and then primed, loaded with explosive, stemmed and then detonated via an appropriate surface initiation system. The occurrence of a premature detonation(s) therefore results in a great deal of consternation and disruption to the mining operation.

Jan 1, 1997

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 Calvin J. Konya

For proper blast design, one must make the assumption that all blastholes release nearly ideal energy. In many types of blasting operations, blastholes release very little useful energy. These blastholes are called malfunctioning blastholes. Recent studies indicate that as many as 30 percent of all blastholes are malfunctioning. These malfunctioning blastholes are not an unusual occurrence.

Jan 1, 1988