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A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back ...
Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production.
Augur (or Punch) Mining A form of unmanned underground mining offering minimal capital cost and relatively short start up periods. Large augers or remote-controlled mine equipment bore into coal seams from roadways established on the floor of surface exposures.
Halifax-based Kameron Collieries, a subsidiary of U.S.-based giant Cline Group — which acquired Canada's Nova Scotia's touted Donkin coal project from Glencore (LON:GLEN) and Morien Resources (TSX-V:MOX) last year— is getting closer to reopening the mine once seen as the pillar for the province's mining industry.