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The Science of Empirical Design in Mining Rock Mechanics
By Christopher Mark
"Many problems in rock mechanics are limited by our imperfect knowledge of the material properties and failure mechanics of rock masses. Mining problems are somewhat unique, however, in that plenty of
Jan 1, 2015
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El Mochito Mine – Latest Operational Improvements and Future Challenges in the Area of Mineral Processing
By Renaud Adams, Vladimir Salatic
"The El Mochito Mine located in Honduras, Central America, has produced lead, zinc and silver in concentrates since the 1950s. The paper discusses changes made in both lead and zinc circuits to reduce
Jan 1, 2007
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OFR-96-83 A Study Of Explosion-Proof Enclosures
By P. A. Cox
The purpose of the initial research performed under this contract was to determine the margins of safety in explosion-proof (XP) enclosures, which were designed and certified according to the current
Jan 1, 1982
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Reflections on destress blasting for deep level hardrock mining: Key considerations for successful application of the techniques
By C. Yi, M. Onifade, B. Genc, S. Dineva, T. Zvarivadza, M. Khandelwal
Deep hardrock mines worldwide increasingly face rockbursts as mining depths increase. These events result from the accumulation and sudden release of stress, causing rockmass damage and posing major s
Jun 27, 2025
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Favorable Indication Of 1984 Performance
Data recently released indicate substantial improvement in mineral industry performance for 1984. Business plans to increase plant and equipment spending in 1984 by 14.8 percent, according to a recent
Jan 1, 1984
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RI 4465 The "Carbon-Oxygen Complex" As A Possible Initiator Of Explosions And Formation Of Carbon Monoxide In Compressed-Air Systems
By H. W. Busch
In the course of examinations by representatives of the Bureau of Mines of several compressed-air systems in which explosions had occurred, samples were obtained of the carbon deposits that are formed
Jan 1, 1949
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Some geochemical consequences of environmental change and human activity in Nova Scotia, Canada
By III, Peter J. Rogers, J. Gordon Ogden
A study is described which attempts to identify the chemical factors of common concern to environmental and exploration geochemistry as indicated by recent work in both disciplines in Nova Scotia. Cor
Jan 4, 1992
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Coal-Mine Accidents In The United States 1936 - Introduction
By W. W. Adams
The accident-prevention record of the coal-mining industry in the United States was more favorable in 1936 than in 1935, both from the standpoint of the relative safety of the individual miner on the
Jan 1, 1939
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EPA’s EPCRA Assistance Visits: Getting Prepared (EPCRA Actually Consists Of Sections Other Than 313?)
By K. Ward
The Environmental Protection Agency (EPA) is beginning to provide compliance assistance visits to various industries, including mining, for Emergency Planning and Community Right-to-Know Act (EPCRA) c
Jan 1, 2001
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Drill Monitoring and GPS Developments and their Impact on the Drill to Mill Process
By John Vynne
Too often, a mine’s operations, including drilling, blasting, loading, hauling, crushing, processing, etc., are considered independent steps, rather then a continuous process. In fact, these are inter
Jan 1, 2000
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The Battle of the Metals
By Percy W. Bidwell
THE statisticians had defeated Germany months before she invaded Poland. With batteries of adding machines they had proved that she was suffering from serious deficiencies in critical food- stuffs and
Jan 1, 1940
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OFR-120-78 Improved Fire Protection System For Underground Fueling Areas - Volume I
By B. C. Christensen
The contract objectives are (1) to develop safe practice guidelines which will minimize the chance of fires in underground fueling areas and (2) to develop a low-cost, reliable, automatic fire protect
Jan 1, 1977
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Net Present Value Maximization Model For Optimum Cut-Off Grade Policy Of Open Pit Mining Operations ? Synopsis
The optimum cut-off grade policy maximizes the net present value (NPV) of an open pit mining operation subject to the mining, processing, and refining capacity constraints. The traditional approaches
Jan 1, 2011
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Cyanide Leaching of Gold-Copper Porphyries: Chemistry and Challenges
By K. J. R. Ford, Botz. M. M.
Porphyry copper ores are frequently a source of low-grade gold ore, but gold in these ores is often associated with significant levels of cyanide-soluble copper. Cyanide leaching of such ores increase
Jan 1, 2011
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Modeling on Fluid Flow and Inclusion Motion in a Continuous Casting FC-Mold
By Xinhua Wang, Qiangqiang Wang, Yubin Li, Shusen Li, Lifeng Zhang
"Numerical simulation on the fluid flow in a Flow-Control Mold (FC-Mold) were performed. The motion of inclusions were calculated. With FC-Mold, the flow pattern and surface velocity become more symme
Jan 1, 2013
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IC 8818 The Physical Chemistry Of Mineral-Reagent Interactions In Sulfide Flotation - Proceedings Of Symposium Held At College Park, Md., April 6-7, 1978
This: symposium was sponsored by the Bureau of Mines, U.S. Department of the lnterior, in order to critically examine the state-of-the-art of sulfide flotation chemistry and to define current and emer
Jan 1, 1980
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IC 7130 Testing Respiratory Protective Equipment For Approval ? Introduction
By H. H. Schrenk
The purpose of respiratory protective equipment is to prevent the inhalation of harmful or objectionable atmospheres. Although constituents or contaminants that may render an atmosphere irrespirable o
Jan 1, 1940
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OFR-96-86 Flywheel-Powered Shuttle Car
By Donald Christofferson
This report documents the program conducted to demonstrate the application of a flywheel-powered propulsion system to underground mining shuttle cars. Such application can replace the present electric
Jan 1, 1986
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K-Ar and Rb-Sr dating and the genesis of tungsten at the Clea tungsten skarn property, Selwyn Mountains, Yukon Territory
By K. M. Tompson, R. L. Armstrong, C. I. Godwin
"Tungsten skarn deposits on the Clea property in the Selwyn Mountains, Y. T., are related genetically to a quartz monzonite stock, about 500 metres in diameter at the surface. Lower Paleozoic sediment
Jan 1, 1980
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Design And Application Of Vertical Micropiles To Resist Large Lateral Loads
By Helen D. Robinson
Traditional practice to resist large lateral loads on foundations is the use of large diameter caissons, battered driven piles, or battered micropiles. Dense urban construction environments, however,
Jan 1, 2010