Cutting Trials With a Water-jet-assisted In-seam Tester.
Evans-RJ; Handewith-HJ; Hood-M
Ch 78 in Proc 25 Smp on Rock Mechanics Chicago Illinois 6/25-27/84 PP 767-773 :767-773
An in-seam tester, a hydraulically activated single-pick instrument to measure and record pick cutting forces, was designed and fabricated to establish criteria necessary for the design and development of a water-jet-assisted rotary drum cutting system using moderate-pressure jets (3,000 to 10,000 psi). Data are presented for cutting trials in a simulated coal block and underground in the Pittsburgh coal seam for water-jet assist and dry cutting. Data analyses indicate that water-jet assist significantly reduces pick forces.
Ch. 78 in Proc. 25 Smp. on Rock Mechanics, Chicago, Illinois, 6/25-27/84, PP. 767-773