Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1995-05-02
1996-08-06
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
33 1H, 73761, 73784, 340690, 4052591, E21D 2100
Patent
active
055427880
ABSTRACT:
In a longwall mining operation, a panel to be extracted is formed in a seam of mine material by longitudinally extending headgate and tailgate entries with the panel beginning in a set-up room and ending at a termination line in a recovery room. The recovery room is developed in two stages and is supported by primary and secondary roof support systems that include mechanical roof bolt assemblies, roof trusses, and channel members. The effectiveness of the roof support systems to support the overlying rock strata and withstand the abutment pressure exerted on the strata by the advancing longwall face as it approaches the recovery room is monitored by an instrumentation plan. Data gathered from the instruments is continually monitored as the longwall panel recovery operation progresses.
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Guo Song
Stankus John C.
Jennmar Corporation
Taylor Dennis L.
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