Identifying physical property trends in coal mine structures using portable on-site test devices.
Vandergrift-TL; Conover-DP; Hanna-K
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9598, 1995 Jan; :1-91
Physical properties of coal mine roof, rib, and floor can affect the type and severity of entry failure. Knowledge of the mine-wide trends of these physical properties can be valuable in developing effective ground control plans. Within the context of a larger effort to improve entry stablitiy in high horizontal stress fields and varying geologic conditions, the U.S. Bureau of Mines (USBM) has evaluated three portable, onsite test devices to determine their suitability for mine-wide physical property trend identification. The devices evaluated were the borehole shear tester (BST), the Schmidt hammer, and the point load tester (PLT).
Ribs-Supports; Compressive-strength; Boreholes; Room-and-pillar-mining; Coal-mines; Shear-tests; Load-tests; Strata-control; Mineral-industries
Report of Investigations
NTIS Accession No.
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9598