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Geologic factors in predicting coal mine roof-rock stability in the Upper Kittanning Coalbed, Somerset County, Pa. /

Geologic factors in predicting coal mine roof-rock stability in the Upper Kittanning Coalbed, Somerset County, Pa. / by A.T. Iannacchione ... [et al.] - Bureau of Mines, Washington, D.C. : U.S. Dept. of the Interior, 1981 - 41p. : ill. ; 28 cm. - Report of investigations / United States Department of the Interior, Bureau of Mines 8575 .

Bibliography: p.37-40

Subjects--Topical Terms:
Coal mines and mining--Pennsylvania--Somerset County--Safety measures
Ground control (Mining)
Rock mechanics
Geology, Stratigraphic

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Geologic factors in predicting coal mine roof-rock stability in the Upper Kittanning Coalbed, Somerset County, Pa. /

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