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By S B. Richardson, R E. Danell, D Mead, N T. Moxon

Explosives provide a very concentrated source of energy which is often well in excess of that required to adequately fragment the surrounding material. Blast design, environmental requirements, production requirements and the lack of detailed insitu geological data generally limits the degree to which the explosive energy distribution within the blasthole can be significantly altered using, for example, different explosive formulations or variable loading techniques. However, increased flexibility can often be exercised over a blast through the use of air-decks.

Jan 1, 1993

By A T. Spathis, J J. Felice, W Klass

Cast blasting has become one of the most efficient ways to move waste rock in open cut coal mining. It is used at Mount Thorley Mine in conjunction with a dragline to move some of the overburden onto the spoil dump.

Jan 1, 1992

By Vljay K. Chhipa

Artificial intelligence is" an emerging technology in the field of computer application. Expert system have been developed to imitate human intelligence and reasoning process. Expert systems have much scope of application in the decision making process in mineral exploration as such decisions are highly subjective and expert opinions are very helpful. This paper presents a small expert system to analyze reasoning process in exploring for uranium deposits in sandstone.

Jan 1, 1989

For the year ending February, 1917 PRESIDENT L. D. RICKETTS,1. NEW YORK, N. Y. PAST PRESIDENTS BENJAMIN B. THAYER,1 NEW YORK, N. Y. WILLIAM L. SAUNDERS,2 : NEW YORK, N.Y. FIRST VICE-PRESIDENT SIDNEY J. JENNINGS,1 NEW YORK, N. Y. TREASURER GEORGE C. STONE,1 . NEW YORK, N.Y. SECRETARY EMERITUS ROSSITER W. RAYMOND, NEW YORK,. N. Y. SECRETARY BRADLEY STOUGHTON NEW YORK, N.Y.

Jan 1, 1917

In his introductory remarks Mr. MacKellar referred to three types of development which may be considered to compete with mining for land use. 1. Total Development - in which he cited urban development, and intensive agriculture. 2. Partial development - in which he cited pastoral, and in this category would come National Parks. 3. Non development - in which category would fall the primitive or wilderness areas.

Jan 1, 1971

By Gary Kordosky

Equilibrium modifiers, first introduced into copper solvent extraction reagents in the late 1960?s, are widely used. The properties of various equilibrium modifiers with respect to copper extraction, selectivity, reagent stability and entrainment are discussed and some conclusions are drawn relating the structure of the modifier to the properties of the modifier. A new highly selective, low viscosity modifier is also introduced.

Jan 1, 2003

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

LIMA (PERU) Established May, 1952 James S Young, Honorary Member of Section (Legion of Honor Member) Bernard T Colley, Honorary Member of Section (Legion of Honor Member) Edward H Robie, Honorary Member of Section (Secretary of AIME) Carl W Westphal, Chairman Ernesto A Baertl, 1st Vice-Chairman Pierre L Garrigue, 2nd Vice-Chairman Walter E King, Secretary-Treasurer Avenida Santa Cruz 331 San Isidro, Lima, Peru Daniel M Rodriguez, Assistant Secretary Alberto E Brazzini, Assistant Treasurer Robert P Koenig, Section Delegate Irving L Barker, Special Representative

Jan 1, 1954

By T. R. McMillan, R. D. English

An engineer's education is a lifetime pursuit, a fact which the Society of Mining Engineers of AIME recognizes through its Education Board. Created in 1977 and comprised of six standing committees, the Board addresses several broad areas of responsibility: Continuing education; professional accreditation; statistical reporting; career guidance; scholarships; and educational publications.

Jan 9, 1979

Mr. Address Member is hereby proposed by the undersigned, as a Associate Junior Member of the American Institute of Mining Engineers. Signatures of three Members or Associates. Place of birth Year of birth Education, when, where and how acquired, with degrees, if any. A technical education is not requisite for membership. Dates Please give record of experience on following page with dates; for example, in the form used by "Who's Who In America" and similar publications.

Jan 11, 1917

R. W. NEWCOMB, New York, N. Y. (written discussion *).-In this paper, the author has enumerated the various sources of error that may, under certain conditions, develop in instruments of the direct-deflection type, but through a failure to mention possible sources of error in instru-ments of the potentiometer type, he leaves the reader with a wrong im-pression. If he would carry his criticisms further and give a list of the possible sources of error on potentiometer instruments, the paper would be more complete.

Jan 12, 1919

By D J. P Jordan, C V. B Cuningham, A J. Rorke, C G. Ladds, O L. Davey

"During the early stages of the boxcut mining at the Arthur Taylor Colliery, Open Cast Mine(ATCOM), problems were experienced with blasting results. Very large boulders andportions of completely unfragmented rock were commonly encountered. A full blastmonitoring programme was instigated by the mine and the explosive supplier to solve theproblems and to optimise future blasting operations at the mine."

Jan 1, 1993

By B. Gilbertson

This paper presents a method that enables one to estimate the risk-adjusted discount rate. that should be used In project discounted cash-flow analysis. The risk-adjustment process is carried out via the capital asset pricing model of modern finance theory, in which the appropriate measure of risk is the beta coefficient of the project concerned. The resulting discount rate thus depends on the properties of the project Itself, and not on the nature or cost of the capital of the firm considering the investment.

Jan 1, 1980

By D. L. Morrison

The School on the Accounting for Gold, which was organized under the auspices of The South African Institute of Mining and Metallurgy by Dr Hugh E. Bartlet, Consulting Metallurgist of Johannesburg Consolidated Investment Company Limited, was held at the South African Nature Conservation Centre at Delta Park, Johannesburg, on 15th to 17th May, 1989. It was attended by 178 delegates, including 2 from the OK and 4 from Zimbabwe. A total of 19 papers were presented covering the components of gold-accounting procedure, sampling techniques, and new sampling technology.

Jan 1, 1989

PRESIDENT. .CHARLES F. RAND,1 NEW YORK, N. Y. PAST PRESIDENTS. CHARLES KIRCHHOFF,1 NEW York, N. Y. JAMES F. KEMP,2 NEW YORK, N. Y. FIRST VICE-PRESIDENT. BENJAMIN B. THAYER'1 NEW YORK, N. Y. TREASURER. GEORGE C. STONE,' NEW YORK, N. Y. SECRETARY EMERITUS. ROSSITER W. RAYMOND, NEW YORK, N. Y. SECRETARY . BRADLEY STOUGHTON NEW YORK, N. Y.

Jan 6, 1913

For the benefit of those of our members who are considerable holders of securities, but owing to their isolated situations are not in close touch with the metropolitan market and current quotations, we are publishing two very interesting graphs, showing the course of the bond and stock markets in New York over a long period. These graphs are furnished through the courtesy of the financial department of the New York Tribune.

Jan 7, 1919

Jan 1, 1941

By R. C. Freas

Limestone is a basic raw material in the production of cement, lime, a wide variety of industrial products, and a significant percentage of the crushed stone produced in the United States annually. It is used in fluxes, glass making, mineral fillers, environmental applications such as flue gas desulphurization and water treatment, soil conditioners, animal feeds, and as a construction aggregate. This presentation provides an overview of limestone distribution in the United States, it’s production, the variety of products produced, and a brief review of the primary uses for limestone.

Jan 1, 2006

MASSMIN 92 edited by H.W. Glen. Johannesburg, The South African Institute of Mining and Metallurgy, 1992. xiii, 485pp. ill. 30 cm. (SAIMM Symposium Series S12). Includes bibliographies. ISBN 1-874832-18-8. R342 (MemberR285; Student Member R218,88. Available in Australia from the AMF Bookshop, 63 Conyngham Street, Glenside, SA 5065 at $A171.00 (approx). This volume is the twelfth in a series of symposia published by The South African Institute of Mining and Metallurgy since 1962. This particular meeting addressed the subject of the underground mining of massive ore bodies.

Jan 1, 1994

By D C. Ibana

The use of electrostatic fields to effect phase dispersion and agitation in solvent extraction (SX) has demonstrated many advantages over conventional mechanical methods and is therefore a very real alternative. Despite this, an industrial application of the technique is yet to be developed. Here, the several variations of the technique that have been proposed are reviewed, the state-of-the-art assessed and key limitations to a commercial application outlined.

Jan 1, 2006