Longwall mining methods applied to the Plains coal region

CIM Bulletin, Vol. 73, No. 813, 1980

A.B. SZWILSKI, Visiting Associate Professor, Department of Mineral Engineering, University of Alberta

The various elements of longwall mine design are reviewed, particularly as they apply to conditions in the coalfields of the Plains region of Alberta. The following recommendations are made: (1) optimum panel lengths of 1000 to 2000 metres; (2) face lengths of 100 to 150 metres; (3) the use of retreat methods; (4) the restriction of floor undulations to less than 15 degrees.
Keywords: Coal mining, Longwall mining, Plains coal, Alberta, Retreat mining, Rib pillars, Moscow Coal Basin, Lignite.