Application of large-hole burn cut in room-and-pillar mining /
Application of large-hole burn cut in room-and-pillar mining /
by R.L. Schnidt ...[et al.]
- [Washington] : U.S. Dept. of the Interior, Bureau of Mines, 1975.
- 25 p.
- Report of investigations ; 7994 .
- United States. Bureau of Mines. Report of investigations ; 7994 .
- Report of investigations (United States. Bureau of Mines) ; 7994 .
91055184
Blasting.
Mining engineering.
91055184
Blasting.
Mining engineering.