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By A. Vogelzang

The paper describes how the level of the water-table was reduced as a result of increased pumping of water from the mine. Because such a condition in an area where there is compactable material above solid dolomite results In surface movement, steps were taken to restore the water-table to its former level. These included the return of water underground via a sinkhole and boreholes, and the piping of water from another mine.

Jan 1, 1978

Mining Methods LUCIEN EATON, Chairman GERALD F. SHERMAN, Vice-chairman CHARLES W. WRIGHT, Secretary Alluvial Mining CLINTON BERNARD CHARLES H. MUNRO CHARLES JANE N H. R. NORSWORTHY Open-cut Mining Iron MAX H. BARBER J. A. MacKILLICAN Copper MICHAEL CURLEY H. B. TEMPEST Underground Mining Iron C. H. BAXTER CARL BREWER TENNEY C. DESOLLAR Copper W. B. DALY A. H. WOHLRAB R. W. THOMAS

Jan 1, 1934

University of Alabama University, Alabama Mining and Metallurgical Society Meets first and third Mondays each month JOHN MACLEOD MCKEE, President WILLIAM L. ALLMAN, Secretary J. R. CUDWORTH, Faculty Sponsor RICHARD L. BOWRON, Counselor University of Arizona Tucson, Arizona Millers' Society LA MONT WEST, President AL WALLACH, Secretary J. B. CUNNINGHAM, Faculty Sponsor B. R. HATCHES, Counselor

Jan 1, 1939

A fast, easy, and inexpensive method of determining the consolidation of overburden in surface mining operations through seismic analysis has been developed. The method involves use of a refraction seismograph which measures overall consolidation of subsurface materials, including such factors as rock hardness, stratification or lamination, fracturing or jointing, and the degree of weathering or decomposition. It also is possible to determine the thickness of various layers of subsurface materials to depths exceeding 100 ft.

Jan 8, 1959

By John R. Lotz

A team of American experts is tackling a whole nations's problems, under the banner of a seven-year plan evolved by the Iranians themselves.

Jan 7, 1950

By Jeffrey E. Loney, Andrew F. McKnown

Recovery of contaminated groundwater migrating through bedrock can be very difficult due to the low transmissivity of many bedrock fracture systems. To overcome these difficulties, a system of controlled "trench" blasting has been used on several projects to assist in cutting off and collecting groundwater plumes in bedrock. By using a combination of trench blasting and presplitting techniques, linear "fracture" zones are created in appropriate locations to significantly increase flow into recovery wells and control plume migration.

Jan 1, 1995

By H. E. Cross

The conversion of a uranium plant to the recovery of zinc by H. E. CROSS. B.Sc. (Eng.)(Hons.) Rand (Fellow) The conversion of the Vogelstruisbult Uranium Plant into a plant for the production of electrolytic zinc is described. The reasons for the conversion, the preliminary investigations. and the basic design principles are all outlined, and a brief account is given of operating experience.. during the commissioning of the plant, with equipment that had been put to a use for which it was not originally Intended.

Jan 11, 1973

By H. K. Shearer

Oil production in South Arkansas in 1936, estimated to have totaled 10,654,940 bbl., showed a decline of 484,400 bbl., or a little more than 4 per cent from 1935. There are no proration restrictions, as practically all wells reached the pumping stage years ago. Although a new shallow field was discovered in Nevada County, and a deep producing horizon

Jan 1, 1937

The tragedy of the Moura No. 2 incident has lost much of its emotional mileage for those organisations that thrive on loss and suffering. However, for the families, workers, mine owners and operators in the Queensland underground coalfields, the challenge of delivering a positive outcome, though well underway, is in its infancy. The pressure created by interested parties is necessary for overcoming the inertia involved in change; but they cannot deliver the change. The responsibility ultimately resides at each individual minesite with the people who work there each day.

Jan 1, 1998

The Kalkadoon Granite is regarded as composite in character with at least two different phases. The older phase is considered older than the sediments of the Western Geosyncline, and the younger phase is considered younger than the sediments of the Western Geosyncline.Consequently, the older phase could be a time equivalent of the Ewen Granite, whereas the younger phase could not. An age of 1760 million years seems plausible for the older phase, and an age of 1540 millionyears seems appropriate for the younger phase.

Jan 1, 1967

Organization Place Date 1918 American Chemical Society Cleveland, O. Sept. American Society of Sanitary Engineers Chicago, 111. Sept. National Petroleum Association Atlantic City, N. J. Sept. American Institute of Mining Engineers Colorado Sept. 2-7 National Association of Stationary Engineers.... Cincinnati, O. Sept. 9-13 Association Iron, Steel, Electrical, Engineers Baltimore, Md. Sept. 9-14 British Iron and Steel Institute, Autumn Meeting London, Eng. Sept. 12-13 National Exposition of Chemical Industries New York, N. Y. Sept. 23-28 American Electrochemical Society Princeton, N.J. Sept 30-Oct. 2

Jan 7, 1918

Mining employment, gross output, local economic contributions and productivity are typical economic indicators. However, these economic indicators play a much bigger role in the overall capacity of the industry to be heard in decision-making on a national scale. Total mining employment in the USA has decreased significantly in the last 20 years. Gross output from most of the mining sectors has also declined, except in the case of construction aggregate. However, significant gains have been made in productivity. This paper explores these statistics and comments on their overall impact on academic institutions and political decision-making.

Jan 1, 2003

By M. J. King, W. K. B. Loftus, H. S. Simpson

SYNOPSIS The history of the early diamond fields and primitive methods of diamond recovery are traced, giving a brief description of the improvements made in final diamond recovery processes and techniques up to the present day. In particular the emphasis is on the effect of improved equipment in reducing final hand sorting time and labour, better security and greater recovery of fine diamonds.

Jan 1, 1919

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 12, 1919

The reformulation of military explosives and solid propellants into commercial explosives offers a unique solution to the problem of disposing of high energy materials with essentially zero environmental impact at a low cost and with a salable product. Studies using the insensitive PBX PBXN-4 have been completed through the pilot plant stage and have been successfully tested as a mining explosive. A number of other military explosives have been examined and their VODs and heats of explosions determined and in some instances tested in 'field" operations.

Jan 1, 1995

Council for 1998/99 President R.P. Mohring President Elect J.R. Dixon Vice Presidents Senior M.H. Rogers Junior Dr L.A. Cramer Immediate Past President Dr N.A. Barcza Honorary Treasure J.A. Cruise Members of Council J.P.W. Bennie E.G. de Villiers A.A.B. Douglas F.M.G. Egerton R. Graham Dr R.G. Gürtunca Dr R.V.R. Handfield-Jones P.J. Knottenbelt R.G.B. Pickering* P.S. Piper Prof. R.F. Sandenbergh Dr T.R. Stacey D.J. van Niekerk P.J. Venter J.C. Viljoen

Jan 1, 1998

By V. Y. Kirillin, V. A. Rumjantsev, S. A. Tchesnokov, Yu A. Veksler, V. F. Kalmykov, A. N. Telgarin, A. T. Shakirov

Mining in outburst hazard seams may be safe and effective if some preventive measures, such as lowering gas and rock pressure as well as speed regulating of a continuous miner in cutting the seam would be practised. The driving speed should be optimal as the low speed lowers labour productivity but the high speed may cause gaso-dynamic phenomena. At this mine the driving speed is regulated by seismo-acoustic control of the seam condition.

Jan 1, 1985

-in 1961,.West Australian Petroleum's Eneabba. No. 1 bore encountered twenty-two' seams of coal totalling forty feet in thickn' ss between the..'depths of 6373 feet and 64,/,1 feet. 0n'ana:lysis; this coal had a. similar calorific value (8000 - 9000 B.

Jan 1, 1964

By John R. Turney

MARY KORPI: Harry Hinds will be filling in for John Turney today. Harry is an exception to the industry these days, in more ways than one. He has worked for the same mining company for 33 years. That is something very few of us can claim. He is currently metallurgical superintendent for Homestake Mining Company in Lead, South Dakota. Harry is also the envy of many of us as he will be retiring this year and working on lowering that handicap! Harry will be discussing the "Role of Consultants."

Jan 1, 1998