Results 31 - 33 of 33
Effects of Stimulation Treatments on Coalbeds and Surrounding Strata: Evidence from Underground Observations1/1/1987 - Reports of InvestigationsStimulated vertical boreholes are an effective means of removing gas from coalbeds in advance of mining. This Bureau of Mines report examines the coal mine roof damage potential of stimulation treatments. Twenty-two government-sponsored stimulation trea...
Geology of the Lower Kittanning Coalbed and Related Mining and Methane Emission Problems in Cambria County, Pa.1/1/1979 - Reports of InvestigationsThe Bureau of Mines established geologic factors affecting the mining of the Lower Kittanning coalbed to aid in coalbed minability studies and examined the occurrence of "wants" (places where coal is missing) and types of unstable roof rock strata.
Geologic Factors Causing Roof Instability and Methane Emission Problems: The Lower Kittanning Coalbed, Cambria County, Pa1/1/1973 - Reports of InvestigationsA geologic study of Mines 32 and 33 in Cambria County, Pennsylvania, was conducted as part of a methane control research program.