Design of longwall mining system [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1979.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 46 : digital, PDF file
- Additional Creators:
- United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- A premining investigation includes core drill holes, seismic studies, satellite imagery and, where the underground is accessible, bearing strength tests of roof and floor, and residual stress determination. Longwall retreat is the preferred method in the USA. Exceptions are few. The objective of panel design is to maintain ground stability and to provide optimum resource recovery with the most cost-effective panel configuration. Environmental considerations, such as surface utilization, hydrology, oil and gas wells, affect panel location and layout. Roof support selection criteria stem from premining data. Prototype roof supports must satisfy an intensive testing program. Mining equipment, such as cutter loaders, face conveyors and stage loaders, is designed to match the production goal and anticipated face conditions. Coal clearance, power supply, men and supply transportation, communications, and equipment maintenance programs must be commensurate with the extraction potential. Face lighting must comply with mandatory standards. Operational monitoring and analysis include operational data extracted and summarized from shift and monthly records, and from ground control and subsidence observations.
- Published through SciTech Connect.
1. conference on ground control problems in the Illinois coal basin, Carbondale, IL, USA, 22 Aug 1979.
Curth, E. A.
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