A Report of The Current Mining Developments Committee Coal Division C.I.M; Roof Bolting

AVITAL FACTOR in the success of any coal mining operation is the method of roof support employed. A coal seam in place has been described as the filling in a geological sandwich and the process of mining as the art of snatching the filling from the midst of the sandwich.
Keywords: Bolts, bolts, coal mining, Dominion Steel & Coal Corporation, rock, U.S. Bureau of Mines, Mine, Mines, Rock, Rocks, Roof bolting, steel, Steels
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