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By Cam B. Grundstrom

This paper will describe blast design modifications that have been made at the Island Copper Mine, near Port Hardy, British Columbia. To date, two additional designs have been implemented in an effort to reduce final wall damage and increase productivity. The typical blast patterns in use at Island Copper were monitored in an effort to build up data to which new designs could be compared.

Jan 1, 1994

By Jaak J. K Daemen, Carol Geertson

A portion of a tailings impoundment may need to be removed with the expansion of an open-pit mine in northeastern Nevada. The tailings are saturated and consist of fine silty soil. During the removal of the tailings, they would have no support structure and vibrations induced by blasting in the pit could lead to slope failures.

Jan 1, 1998

By A N: Zditovetsky Shishov, M G. Menzhulin

At present in a building industry demand for products from granite, gabbro and other rocks, steady to erosion, natural and chemical weathering, was essentially increased. It has caused the enlargement of exploitation of stone block deposits and necessity of creation of new technologies of hard stone cut.

Jan 1, 1996

By Calvin J. Konya

Precision Blasting has designed easy to use, yet, highly powerful databases for storage and retrieval of blasting data. Three different Databases are available for blasting data management. The Vibration Data Management is a complete vibration record keeping system. The Blasting Data Management will record the information from the blasting report as well as the vibration data. The Explosives Inventory Control makes the control of explosives and initiators quick and easy.

Jan 1, 1991

By H J. MacDonald

An Exploding Bridgewire Detonator (EBW) is an explosive initiator which contains only secondary explosives such as PETN and RDX. It is safer than the normal blasting cap because it requires both high electrical energy and a very fast application of that energy to function

Jan 1, 1981

By I E. "Chip" Harris, G Alan Foster

Whilst a great deal of published data exists as to safe ground vibration and air blast levels which result from blasting little documented research has been carried out to determine how and why human beings complain about blasting operations. This paper gives the authors thoughts and experiences of why complaints arise and practical steps to minimize such complaints.

Jan 1, 1977

By C. B. Navalkar

The optimization of blast design under consideration is for the conventional driveways in under ground coal mines with respect to board & pillar workings in India. Basically The Blast Design includes following parameters: AA> Drilling Pattern. BB> Charging Pattern. CC> Material & Method Of Stemming. DD> Selection of type & quantity of explosives. EE> Initiation system & Blasting Sequence.

Jan 1, 2002

By Thad M. Jones

This paper considers the sampling, digitizing and reconstruction of seismic signals. A sampling frequency range is proposed and a minimum limit is suggested. Digitizing precision criteria for both peak velocity and analysis applications are given. Several methods for reconstructing signals from sampled data are presented.

Jan 1, 1985

By Yves Lizotte, Malcom Scoble, Pierre Michaud

The concept of optimum fragmentation in surface mining operations, i.e. the degree of fragmentation to which corresponds the lowest overall associated costs of drilling, blasting, loading, haulage and crushing, was developed more than thirty years ago. Recent field investigations using novel technologies, which have been completed by ICI Explosives Canada and by others, indicate that this ultimate goal of optimum fragmentation is closer to becoming reality.

Jan 1, 1997

By E E. Cloete, R I. McCrindle

Permitted explosives were previously nitroglycerine based and cap sensitive. Due to safety, health and environmental requirements, water-containing explosives, such as watergels and emulsions, were used instead. However, in order for these explosives to perform at their designed level during blasting, a more powerful stimulus than is delivered by detonators on their own is required.

Jan 1, 1999

By Henry P. Van Ormer

This paper discusses some basic fundamentals in compressed air system design and layouts that should always be considered in planning or evaluating a compressed air distribution system in Construction and Mining. Often times, mining operations use central air or "power house" type systems that more closely resemble a typical industrial or plant compressed air distribution system. This paper does not attempt to cover this type of system.

Jan 1, 1975

By Thomas E. Brown

With the ever increasing public sensitivity to our environment, the blasting industry can no longer be concerned with just drilling and blasting. Government regulations, augmented by public pressure, require that the industry must be more diligent in preventing spills, disposing of distressed products and packaging materials, controlling fumes and dust, preventing product contamination, developing environmental impact studies, and preventing unnecessary regulations. These liabilities in conjunction with those of vibration, air overpressure and flyrock will continue to greatly impact the industry.

Jan 1, 1995

By Shad M. Sargand, Manseok Chang, Glenn A. Hazen

Customarily, peak particle velocity of surface wave vibrations has been the recommended criterion for the prediction of blast damage to structures. Currently blast spectrum and natural frequencies of a structure have been also recognized as important for predicting damage potential. While others have considered the importance of structural frequencies, they have not analyzed the structural response spectrum when establishing damage criteria.

Jan 1, 1992

By T N. Hagan

Where explosion energy moves rock from the in-situ to its desired location without considerable assistance from digging and/or hauling equipment, good fragmentation is of minor importance. Maximum displacement must remain uppermost in the mind of the blast design engineer.

Jan 1, 1979

By Richard G. Burdick

The use of explosive charges for generating seismic energy has been around for a long time. For oil-field work or crustal studies, when the target of interest is many thousands of feet deep, the surface waves and similar phenomena are of little consequence. In mining applications, however, when the target is a few tens or hundreds of feet deep, the return signals are often masked by these waves and an accurate interpretation is difficult or impossible.

Jan 1, 1981

By Jay P. Tobin

This paper will address the legal standards applicable to construction blasting lawsuits and offer best practices suggestions for pre-blast inspections, documenting the construction blasting work, recordkeeping, and effectively participating and partnering in the defense of a construction blasting lawsuit.

Jan 1, 2015

By John F. Vynne

This paper will discuss the application of available monitoring technology on blasthole drills with the goal being to reduce costs and increase productivity. Case studies from the monitoring of blasthole drills in North American open pit mines will be used to illustrate the ability to meet these objectives.

Jan 1, 1997

By F Hunyadi

The seismic effects resulting from blasting are still a problem today although a great deal of research has been conducted in this field. A great amount of data defining the seismic effects can be collected with the proper instrumentation, however because of the difference in building materials, construction methods and foundations the characteristics of the seismic wave can not be directly correlated to the building response and possible damage.

Jan 1, 1975

By Steven P. Case

To meet salt production needs over the remaining life of the Cayuga Mine at Lansing, New York, the Salt Division of Cargill, Inc. decided to build a new underground screening plant. The new plant required a chamber 50 feet wide by 250 feet long and nearly 70 feet high. On advise of their mining contractor, Dynatec Mining Company, the company chose an ingenious excavation method similar to sublevel stoping. This method eliminated the need for an access ramp, reduced equipment needs and excavation time substantially.

Jan 1, 1996

By He Guangyi

During rock blasting in extending deep cutting from Jiu Li Mountain to Dong Zhuang Village in Jiao Zhi Railway line, we have drilled deep hole with large scale diving drilling machine and successfully carried on controlled blasting. This has provided new experiences for rock blasting in extending existing cutting. The aim of this article is to provide an introduction to bench height, blast holes arrangement, powder charge calculation, and detonating technique during blasting.

Jan 1, 1997