Roof drill - new source of low-cost roof strata information.
Frizzell-EM; Howie-WL; Briggs-RC
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado. Hustrulid WA, Johnson GA, eds., Brookfield, VT: A.A. Balkema, 1990 Jan; :505-510
An ongoing research program at the Spokane Research Center of the U.S. Bureau of Mines is directed toward investigating drilling parameters (thrust, torque, penetration rate, and drill revolutions) during the drilling of roof bolt holes. A system that measures these drilling parameters, calculates the specific energy of drilling, and determines drill bit position has been developed by the Bureau and mounted on a roof drill. Through the use of a microcomputer, critical drilling parameters can be immediately interpreted and analyzed. This makes it possible to inform the operator of hazardous roof conditions. Initial results of this program are presented here.
Mining-equipment; Machine-operation; Machine-tools; Measurement-equipment; Computer-models; Computers; Computer-software; Analytical-instruments; Analytical-processes; Machine-operators; Rock-mechanics; Hazards; Information-processing; Information-systems
OP; Conference/Symposia Proceedings
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado