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Integrated shield and pillar monitoring techniques for detecting catastrophic failures.

Cox-RM; Conover-DP; McDonnell-JP
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines. Washington, DC: U.S. Bureau of Mines, 1995 May; :119-140
The Ground Control Management System (GCMS) developed by the U. S. Bureau of Mines has allowed researchers and mine management personnel to monitor geostructural data remotely and evaluate ground stability conditions in real-time during high-speed mechanized extraction of coal from longwall panels. Because of the high rate of advance of mechanized longwall faces and the frequent encounter of changes in geologic structure, mine operators are finding it increasingly difficult to cope with the rapid changing ground conditions encountered during succeeding production shifts. The GCMS offers a solution to these problems by combining existing mine monitoring technology with automated computer analyses specifically formulated for ground control management. The GCMS has been used to collect and analyze data from several longwall panels instrumented to evaluate (1) shield loading behavior, (2) ground pressure redistribution, and (3) ground failure modes associated with catastrophic floor bumps in tailgate roadways. This paper summarizes practical applications of the GCMS and shows how the system can be used to anticipate and detect ground hazards while mining progresses. Shield loading anomalies and ground pressure changes related to major panel roof failures and catastrophic tailgate roadway closures caused by floor bumps are discussed.
Mining-industry; Coal-mining; Rock-falls; Rock-bursts; Rock-mechanics; Underground-mining; Control-technology; Geology; Geophysics; Engineering-controls; Computer-software; Ground-control; Ground-stability
Publication Date
Document Type
Book or book chapter
Maleki-H; Wopat-PF; Repsher-RC; Tuchman-RJ
Fiscal Year
NIOSH Division
Source Name
Proceedings: Mechanics and Mitigation of Violent Failure in Coal and Hard-Rock Mines
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division