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Results 21 - 30 of 32
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1/1/1992 - Information CircularsMULSIM/NL is a U.S. Bureau of Mines boundary-element-method program for calculating stresses and displacements in coal mines or thin, tabular metalliferous veins. This manual gives detailed operating instructions for MULSIM/NL and illustrates its use w...
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1/1/1992 - Information CircularsThe program described in this U.S. Bureau of Mines report is part of the MULSIM/NL package, which features the actual BEM program described herein, as well as a preprocessor program called MULPRE/NL and a plotting postprocessor program called MULPLT/NL.
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1/1/1992 - Information CircularsReviews the mechanics of rib failure and the relationship of coal mine geology and pillar constraint to rib instability. Strategies for choosing an effective method of rib support are considered and various rib support methods are discussed.
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1/1/1992 - Information CircularsA U.S. Bureau of Mines review of all upper extremity cumulative trauma disorder injuries as reported by law and maintained on the MSHA accident data base from 1985 thru 1989.
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1/1/1986 - Information CircularsResearch was conducted to determine whether the total elapsed delay time for blasting bituminous coal in underground coal mines could be safely expanded beyond the 500-ms limitation without igniting a methane or methane-coal dust atmosphere.
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1/1/1980 - Information CircularsReviews underground methane drainage programs being conducted in various coalbeds. Equipment used in drainage programs such as drills, underground pipelines, and methane monitoring systems is described.
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1/1/1977 - Information CircularsThis Bureau of Mines report tabulates methane emissions from U.S. Bituminous coal mines with daily emission rates of at least 100,000 cfd according to states, counties, and coalbeds. Most of the methane emitted is from mines in the Appalachian States. T...
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1/1/1974 - Information CircularsThis Bureau of Mines survey of methane emissions indicates that total daily emissions have declined from 227 mm ft3 in 1971 to 214.7 mm ft3 in 1973. The highest average daily emissions in million cubic feet per day are detailed by state.
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1/1/1974 - Information CircularsThe Technology Transfer Seminar on Mine Communications held on March 21-22, 1973, at the Pittsburgh Mining and Safety Research Center, Bruceton, Pennsylvania, presented information about recently developed equipment, instruments, and techniques for use ...
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1/1/1973 - Information CircularsResearch workers from the Bureau of Mines and industry met with other government and industry representatives at the Mont Chateau Lodge, Morgantown, West Virginia, on May 30-31, 1973, to discuss the current status of methane control in eastern U.S. coal...
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Content source: National Institute for Occupational Safety and Health, Mining Program