Development of large diameter drilling equipment.
Washington, DC: U.S. Department of the Interior, Bureau of Mines, Contract H0262037, 1976 Nov; :1-307
Comparative evaluations; Design; Drill bits; Drilling equipment; Experimental data; Lining processes; Performance testing; Rotary drills; Shaft excavations; Underground mining
CP; Final Contract Report
Office of the Assistant Director-Mining
Washington, DC: U.S. Department of the Interior, Bureau of Mines, Contract H0262037
Foster-Miller Associates, Inc., Waltham, MA