Excavation of Coal Using a High Pressure Water Jet System.
Summers-DA; Heincker-W; Eck-RS; Raghavan-SH
NTIS: PB/244-516 Available for Reference At Bureau Libraries :286 pages
This report gives the results of experiments carried out to establish the potential for high-pressure water jets as the cutting units for a longwall mining machine. It was found that within experimental limits and for a given pump output, an increase in nozzle diameter is more productive than an increase in jet pressure. The faster the jet traversed, the more efficiently it cut. The contraoscillation of adjacent cutting arms was found to be an effective method of reducing traverse distance. Dual orifice nozzles with a diverging angle of 20 deg between the jets were found most effective in cutting the coal to provide access for the cutting head.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/244-516 Available for Reference At Bureau Libraries
University of Missouri