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Cleat in bituminous coalbeds
Espandi opera
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Geologic factors causing roof instability and methane emission problems
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Geologic investigations of underground coal mining problems
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Measuring the methane content of bituminous coalbeds
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Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia
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Selected geologic factors affecting mining of the Pittsburgh coalbed
Espandi opera
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The direct method of determining methane content of coalbeds for ventilation design
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Use of surface joint and photolinear data for predicting subsurface coal cleat orientation
Espandi opera
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