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Ground Control Study of a Mechanized Longwall Coal Operation in West Virginia.
MISSING :34 pages
This Bureau of Mines report summarizes the analysis and evaluation of the field measurement results of a comprehensive ground control study conducted in a mechanized longwall coal mine in West Virginia. Emphasis is placed on the three basic ground control parameters: ground pressure, ground movement, and geomechanical properties. Specific topics include premining ground pressures, front-abutment pressure in the longwall panel, histories of pillar loading, differential roof-strata movement and bed separation, differential floor strata movement, entry roof-to-floor convergence, in situ moduli of rigidity of coal seam and roof and floor strata, and mechanical properties of coal and coal measures rocks.
IH; Report of Investigations
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division