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1/1/1990 - Reports of InvestigationsThe Bureau of Mines has developed an acoustic test for determining if a rock salt sample is from a "normal" nongassy salt face or from a gassy face where an outburst has the potential to occur.
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1/1/1988 - Reports of InvestigationsThe Bureau of Mines conducted an investigation into the occurrence of outbursts of salt known to be responsible for explosions, fatalities, and damage in domal salt mines. The purpose of the investigation was to develop a basis for predicting these outb...
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1/1/1987 - Reports of InvestigationsThe Bureau of Mines has developed a practical methodology for determining occluded gas contents of domal rock salt samples. The method, which is portable and fieldworthy, provides results in 5 min or less.
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1/1/1987 - Reports of InvestigationsThe Bureau of Mines determined the gas contents of 135 oil shale samples obtained from approximately 630 ft of core drilling. Drilling was done within a projected mining zone of the Cathedral Bluffs Mine, located in the Piceance basin of western Colorad...
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1/1/1984 - Reports of InvestigationsThis report considers the results achieved when 80 domal salt samples were tested for gas content by dissolution in a controlled atmosphere chamber.
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1/1/1984 - Reports of InvestigationsThis Bureau of Mines research study found gas emission rates from an advancing face, and flows and pressure of gas from an exploration drill hole were dependent upon the geology of salt encountered in a domal salt mine. This information suggests a great...
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9/1/1982 - Reports of InvestigationsThe Bureau of Mines has developed two experimental designs for determining the volumes and relative proportions of the various gas species, particularly methane (CH4), occluded in rock salt. The two methods are ball- mill crushing and dissolution. Of th...
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1/1/1982 - Reports of InvestigationsThe Bureau of Mines measured methane emission rates from an advancing salt face ranging from 15 to 56 ft3/ton (0.5 to 1.8 M3/t). Small room size, use of a continuous miner, and a well-defined ventilation system made possible air velocity and methane con...
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1/1/1977 - Reports of InvestigationsThe Bureau of Mines made laboratory absorption measurements on oil shale samples, which showed that the amount of methane absorbed is proportional to pressure and oil yield, and can be much larger than would be predicted based solely on porosity. Oil sh...
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Content source: National Institute for Occupational Safety and Health, Mining Program