Walker, Jeffrey S.
State-of-the-art techniques for backfilling abandoned mine voids / by Jeffrey S. Walker. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1993] - 17 p. : ill. ; 29 cm. - Information circular ; 9359 . - Information circular (United States. Bureau of Mines) ; 9359. .
Includes bibliographical references (p. 17).
91041440
Mine filling.
Abandoned coal mines.
Mine subsidences.
TN295 TN292 / .U4 no. 9359
622 s 622
State-of-the-art techniques for backfilling abandoned mine voids / by Jeffrey S. Walker. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1993] - 17 p. : ill. ; 29 cm. - Information circular ; 9359 . - Information circular (United States. Bureau of Mines) ; 9359. .
Includes bibliographical references (p. 17).
91041440
Mine filling.
Abandoned coal mines.
Mine subsidences.
TN295 TN292 / .U4 no. 9359
622 s 622