Investigation of optimizing traverse speed of water-jet assist drag picks.
Evans RJ; Handewith HJ; Taylor CD
Water-jet-assisted cutting. Proceedings: Bureau of Mines Open Industry Meeting, Pittsburgh, Pennsylvania, June 21, 1984.Taylor CD; Evans RJ, eds. Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9045, 1985 Jan; :69-76
A cutterhead was designed and fabricated at the Bureau of Mines Pittsburgh Research Center to evaluate the rock weakening effect, when using waterjet-assisted cutting, that may result from increased travel speed using moderate-pressure jets (3,000 to 9,000 psi). Two pick types, conical and flat, were analyzed for speeds ranging from 30 to 300 ft/min. The objective was to establish traverse speed threshold levels that are necessary to maintain the optimum reduction in cutting tool forces. In addition, measurements were taken to measure dust reduction when using water-jet assist. Results indicate that when employing water-jet-assisted cutting, only a negligible reduction in the rock weakening effect was observed at higher speeds. As an added benefit, significant dust reduction was evident when employing water-jet-assisted cutting.
Hydraulic jets; Underground mining; Rotary drill bits; Cutting tools; Jet drills; Mining industry; Drilling; Mining equipment
IH; Conference/Symposia Proceedings
Taylor CD; Evans RJ
Water-jet-assisted cutting. Proceedings: Bureau of Mines Open Industry Meeting, Pittsburgh, Pennsylvania, June 21, 1984