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Results 11 - 14 of 14
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1/1/1992 - Information CircularsA U.S. Bureau of Mines study on the potential availability of copper from 204 mines and deposits in market economy countries.
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1/1/1992 - Reports of InvestigationsThe Bureau of Mines conducted Cu exchange tests for six common clays under simulated in situ leaching conditions. Regression equations were obtained from the data expressing the Cu exchange capacity as a function of Cu concentration, pH, and temperature.
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1/1/1992 - Reports of InvestigationsThe Bureau of Mines completed an investigation of the influence of material on the ignition probability using the breakflash apparatus. This report presents results of an investigation into the influence of disk electrode material on the probability of...
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1/1/1984 - Reports of InvestigationsMethane-drainage holes must be completely filled by grout before mining to prevent the emission of large quantities of gas during mine-through, which would constitute an explosion hazard. In November 1980, seven horizontal holes at the multipurpose bore...
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Content source: National Institute for Occupational Safety and Health, Mining Program