Barczak, Thomas M.
Rigid-body and elastic solutions to shield mechanics / by Thomas M. Barczak. - Pittsburgh, Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1987. - 20 p. : ill. ; 28 cm. - Report of investigations ; 9144 . - Report of investigations (United States. Bureau of Mines) ; 9144. .
Bibliography: p. 8.
87600302
Mine roof control--Testing.
Longwall mining.
TN23 TN288 / .U43 no. 9144
622 s 622/.334
I 28.23:9144
Rigid-body and elastic solutions to shield mechanics / by Thomas M. Barczak. - Pittsburgh, Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1987. - 20 p. : ill. ; 28 cm. - Report of investigations ; 9144 . - Report of investigations (United States. Bureau of Mines) ; 9144. .
Bibliography: p. 8.
87600302
Mine roof control--Testing.
Longwall mining.
TN23 TN288 / .U43 no. 9144
622 s 622/.334
I 28.23:9144