A borehole instrument for measuring mining induced pressure changes in underground coal mines.
Bauer ER; Chekan GJ; Hill JL III
Research & engineering applications in rock masses: proceedings 26th U.S. Symposium on Rock Mechanics, June 26-28, 1985, Rapid City, South Dakota. Ashworth E, ed. Boston, MA: A. A. Balkema, 1985 Jun; 2:1075-1084
The Bureau of Mines Pittsburgh Research Center has been using a simple and inexpensive instrument for measuring mining-induced pressure changes in coal pillars and mine roof. The instrument, the borehole platened flatjack (bpf), is a copper flatjack (bladder) positioned between aluminum platens. It is calibrated in a simulated coal or coal measure rock medium prior to in-mine installation. Laboratory tests have shown the bpf to be repeatable and reliable and that the relationship between gauge pressure and strata pressure is dependent on the initial setting pressure. Field tests have shown that the bpf is easily installed and that it effectively indicates mine areas experiencing increasing or decreasing pressures.
Mining-industry; Measurement-equipment; Analytical-instruments; Pressure-testing; Room-and-pillar-mining; Coal-mining; Laboratory-testing; Testing-equipment; Underground-mining
OP; Conference/Symposia Proceedings
Research & engineering applications in rock masses: proceedings 26th U.S. Symposium on Rock Mechanics, June 26-28, 1985, Rapid City, South Dakota