Browse TRAIL Inventories

Geologic Factors in Predicting Coal Mine Roof-Rock Stability in the Upper Kittanning Coalbed, Somerset County, Pennsylvania

Influence of overlying strata on methane emissions in a northern West Virginia coal mine

Clay veins :their occurrence, characteristics, and support

Geologic factors influencing the gas content of coalbeds in southwestern Pennsylvania

Determining the source of longwall gob gas :Lower Kittanning Coalbed, Cambria County, PA

A method to eliminate explosion hazards in auger highwall mining


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