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Identifying physical property trends in coal mine structures using portable on-site test devices.

Authors
Vandergrift-TL; Conover-DP; Hanna-K
Source
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9598, 1995 Jan; :1-91
Link
NIOSHTIC No.
10005582
Abstract
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).
Keywords
Ribs-Supports; Compressive-strength; Boreholes; Room-and-pillar-mining; Coal-mines; Shear-tests; Load-tests; Strata-control; Mineral-industries
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB96-131636
NTIS Price
A05
Identifying No.
RI-9598
NIOSH Division
DRC
Source Name
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9598
State
CO
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