Evaluation of mine roof bolter components. Volume 1.
Fazio-CP; Hargreaves-WJ Jr.; Kribs-D; Wachtler-R
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, OFR 135(1)-80, 1978 Jan; :1-118
The Bureau of Mines has made significant advances in developing roof bolter components to improve mining operation efficiency with respect to increased productivity and miner safety. This investigation researches Bureau-funded roof bolting component design contracts and commercially conducted research activities. Mining conditions considered for advance design application are low, medium, and high seam heights; rotary, rotary-percussive, and percussive drilling requirements of overburden; and bolting length capability of both less than seam height and greater than seam height. Six roof bolting system concepts are generated that meet these defined conditions and that encompass those roof bolting components considered most promising as a result of trade-off analyses performed.
CP; Final Contract Report
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, OFR 135(1)-80