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Subsidence Monitoring Over Western Coal MinesBy Frederick K. A1lgaier
The Bureau of Mines' Denver Research Center initiated a subsidence research program in 1978. The short ten goals of the program were to determine practical methods and equipment for measuring sub
Jan 1, 1982
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Technical Considerations For The Design And Construction Of Mine Seals To Withstand Hydraulic Heads In Underground MinesBy D. T. Kirkwood
The practice of impounding mine water and liquid fine waste in underground mines is increasing. Often these underground impoundments are created by constructing seals or bulkheads designed to withstan
Jan 1, 1995
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Reagglomeration Phenomena In Fine Grinding Of CoalBy E. Kaya
Investigations of fine grinding of bituminous coal in a laboratory-scale pulverizer are described. The results indicate essentially "normal" breakage behavior at relatively coarse sizes (greater than
Jan 1, 1996
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Laboratory Assessment Of Rock Fragmentation Process By Continuous MinersBy V. B. Achanti
Laboratory studies were carried out at West Virginia University to investigate the rock fragmentation mechanism by continuous miners using an automated rotary cutting simulator. The primary factors in
Jan 1, 1997
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Queens Segment, East Side Access Project, New YorkBy Bernie W. Martin, Jesus Schabib
The East Side Access (ESA) Project in New York will be the largest tunneling project ever undertaken by a US railroad. The objective of the ESA project is to connect the Long Island Rail Road (LIRR) M
Jan 1, 2001
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A Review Of Claims Data--Illinois Mine Subsidence Insurance Fund October 1979 To October 1985By Edmund W. Murphy
At the first workshop on Surface Subsidence Due to Underground Mining (1 981 ) , Yarbrough delivered a paper (1 ) describing the mine subsidence insurance program in Illinois operated as the Illinois
Jan 1, 1986
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Plant Waste and Environmental ConsiderationsBy John G. Groppo, Bonnie Webb-Groppo
INTRODUCTION The first portion of this chapter is concerned primarily with the contamination aspects of fine coal cleaning that include both the solids and water discharged as waste products after c
Jan 1, 1991
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New Japanese Technology For Economic Dredging Of Industrial/Mining Waste Ponds To Reprocess MaterialsBy Peter Van deVelde
Many companies in North America because of economic or environmental reasons are considering reprocessing material from their waste ponds. The Japanese have developed highly specialized machines and
Jan 1, 1983
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Numerical Simulation Of Charge Motion In Ball Mills -Lifter Bar Effect (b2ca2b2d-7baf-4bbb-98f4-343a6b226144)By B. K. Mishra
This paper focuses on the use of a numerical tool known as the discrete element method (DEM) to study the motion of ball charge in ball mills (14-18 ft). DEM is employed to simulate the motion of indi
Jan 1, 1992
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Power Consumption Of Stirred Media Mills (29e9da19-6cb3-4160-84d7-b13daaba4241)Power consumption of stirred media mills has been studied by an approach developed from work on stirred reactors. Relationships between torque required to rotate both disc and pin impellers immersed i
Jan 1, 1994
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Loveridge Coarse Coal Slurry System--An UpdateBy R. L. Shaw, D. W. Alexander
Consolidation Coal Company's Loveridge Mine operates the only coarse coal hoisting and overland slurry transport system in North America. The system has been in operation since April 1980 and acc
Jan 1, 1983
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Precious MetalsBy Nathaniel Herz, R. J. Adamson, C. M. Romanowitz, Frank W. Jr. McQuiston, C. D. Hoyt, Robert S. Shoemaker, P. H. O’Neil
1. INTRODUCTION In this section, precious metals are defined as gold, silver, and the platinum group metals comprised of platinum, palladium, iridium, osmium, and rhodium. If the first three years
Jan 1, 1985
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Evolution Of Mining Equipment Operations In The Wyoming Powder River BasinBy K. R. Miller
In recent years, surface mine equipment operators in the Campbell County region of the Wyoming Powder River Basin have found new ways to solve old problems. This paper will examine overburden strippin
Jan 1, 1998
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Geologic Mapping Techniques And Applications At Kennecott's Utah Copper Division Open Pit Mine At Bingham Canyon, UtahBy Wilbur H. Smith
Geologic mapping techniques at the Bingham Mine have evolved as rapidly expanding applications of geological data have caused new methods to be utilized. The most significant changes in method have be
Jan 1, 1968
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Design of PlantsBy F. A. Gates, Bengt Samuelson, James E. Edmunds, S. McCune, Neil Hario, Norman L. Weiss, J. M. Bertram, A. M. Cavaliere, F. M. Jr. Stephens, D. D. Chiang
DESIGN BASIS Size of Project The size of the project generally is expressed in tons of ore milled per day, but company policies differ widely in this respect with a few adhering to this set figu
Jan 1, 1985
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Optimizing Refractory And Oxide Gold Ore Operations With High-Pressure Grinding RollsOptimal gold recoveries largely depend on efficient liberation of the gold or gold-bearing minerals as well as on maximum access for the lixiviant. Thus, crushing and grinding may become the most cost
Jan 1, 1994
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Heavy Mineral Placers (4805d0a4-d7ed-4952-bcb7-1b02a0140894)By K. J. Stanaway
Concentrations of minerals between 3.5 and 5 specific gravity such as ilmenite, rutile and zircon in large accumulations of sand constitute "heavy mineral" placers. Two fundamentally different modes o
Jan 1, 1991
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Dynamic Modeling & Simulation of a Sag Mill for Characterization of Mill ChargeBy V. Srivastava, T. Ghosh
"Modeling and Simulation of SAG Mill has been widely used in design and optimization of mill performance in terms of its power draw, processing capacity and product size distribution. However, these m
Jan 1, 2017
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"The Effect Of Coal Strip Mine Reclamation On Midwest Water Supplies"By James A. Deane
Strip mine reclamation Fs the process of restoring the land affected by the mining process to its most productive use. This can be timber production, pasture, crop land, wildlife and/or recreational u
Jan 1, 1965
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Rock, Sand And Gravel Resources Strong, But ChallengedBy John E. Roberts
People are not a novelty. But the phenomenal numbers thereof, who have approached, settled, and been born in California in the past twenty-five years, are such a problem as to be a novelty in the broa
Jan 1, 1967