The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 1996
Filed:
May. 02, 1995
John C Stankus, Canonsburg, PA (US);
Song Guo, Morgantown, WV (US);
Jennmar Corporation, Pittsburgh, PA (US);
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.