00000nam 2200000za 4500 9.841728 CaOODSP 20221107152146 cr ||||||||||| 170816s1974 oncabd ob f000 0 eng d CaOODSP eng n-cn--- e-fr--- M34-20/189E-PDF M34-20/189 Barron, K. The mining of thick, flat coal seams by a longwall bottom slice with caving and drawing [electronic resource] / K. Barron, Mining Research Centre. Ottawa : Information Canada, 1974. viii, 196 p. : charts, ill., maps Technical bulletin ; TB 189 Cover title. "March 1974." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 105). “A method, developed in France, for mining thick, flat lying coal seams is described in detail. A longwall face is retreated along the footwall of the thick seam and is supported by powered supports which incorporate a special banana prop at the rear. The coal overlying the face caves behind it and is drawn through the banana props onto a rear face conveyor. Face advance is achieved either by hand mining or by using a conventional double drum shearer. Details of the mining method, problems encountered and good and bad mining practice are discussed. The capital and operating costs, the production and productivity in France are given. Ground control and environmental control problems are also discussed. Consideration is then given to the potential use of this method for mining thick, flat lying, coking coal seams in Western Canada"--Abstract, p. i. gccst Mining industry gccst Coal Canada. Natural Resources Canada. Canada. Mines Branch. Technical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch) TB 189 (CaOODSP)9.834857 PDF 15.76 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-189-eng.pdf 300068