Longwall Mining at Sydney Mines
UNTIL quite recently, the coal in the Cape Breton field was won from comparatively thick seams with light cover, and from submarine areas, and the system of mining naturally followed was pillar-and-stall. This sytem permitted of cheap extraction, and enabled production from localities where other methods could not be employed to good advantage. Thus the pillar-and-stall system, applied to conditions as stated, justified its adoption.
Coal, conveyors, Diamond Coal Cutter Company, feet, gob, headway, longwall, Mine, Mines, North, Roadways, Stone, Systems