Rock Breakage Research for Rapid Hard Rock Tunneling.
Proc Symp Rock Mech and Tunneling Problems Regional Eng College India 12/73 PP 131-139 :131-139
This paper describes the accomplishments in rock breakage resulting from the rock mechanics and rapid excavation program. Funds for the program were authorized by the advanced research projects agency of the Department of Defense, and the program was managed by the Bureau of Mines, U.S. Department of the Interior.
Proc. Symp. Rock Mech. and Tunneling Problems, Regional Eng. College, India, 12/73, PP. 131-139