Water Jet Assisted Longwall Shearer: Development and Underground Test.
Hauer-KF; Neinhaus-K; Thimons-ED
Proc Longwall USA Pittsburgh, Pennsylvania, 1987 Jun; :200-212
This paper summarizes water-jet-assisted cutting results obtained in an underground trial at the Auguste Victoria coal mine in Marl, West Germany. The system tested consisted of (1) high-pressure water jets to assist in the cutting operation and directed immediately in front of the pick tip, (2) phased high-pressure water only to those picks that are engaged in the coal, (3) reduction of the drum speed and consequently of the pick speed, and (4) pick lacing plan on the drum to optimize cutting. The results of the trial show that the respirable dust is 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.
Proc. Longwall USA, Pittsburgh, Pennsylvania, June 2-4, 1987. Coal Mag., Chicago, Illinois, 1987, PP. 200-212