Water Jet Assisted Longwall Shearer Development and Underground Test.
Thimons-ED; Hauer-KF; Neinhaus-K
Proc 4th U S Water Jet Conference Berkeley California 1987 Aug; :113-120
This paper summarizes water jet assisted cutting results obtained in an underground trial. The respirable dust was drastically reduced with water pressures around 125 bar (1,812 psi). The grain size distribution of the coal improved, while the pick wear and the temperature of the picks were considerably lowered. A direct reduction of the pick forces and consequently a reduction of the specific cutting energy and of the drum thrust only occurred to a negligible extent, if they can be proved at all. A pressure of up to 200 bar (2,900 psi) seems to be reasonable for the high-pressure water supply system where the required water quantity approximately equals that of a conventional dust suppression system.
Proc. 4th U.S. Water Jet Conference, Berkeley, California, Aug. 26-28, 1987. ASME, New York, 1987, Pp 113-120