Leakage and performance characteristics of large stoppings for room-and-pillar mining /
by Edward D. Thimons ... [et al.].
- Pittsburgh, Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1987.
- 17 p. : ill. ; 28 cm.
- Report of investigations / United States Department of the Interior, Bureau of Mines ; 9148 .
- Report of investigations (United States. Bureau of Mines) ; 9148. .
Bibliography: p. 17.
87600351
Concrete stoppings (Mining)--Airtightness.
TN23 TN304 / .U43 no. 9148
622 s 622/.3382
I 28.23:9148
Bibliography: p. 17.
87600351
Concrete stoppings (Mining)--Airtightness.
TN23 TN304 / .U43 no. 9148
622 s 622/.3382
I 28.23:9148