Glossary of Mining Terms Rocksandminerals
Abutment In coal mining, (1) the weight of the rocks above a narrow roadway is . of flame resistant material or of reinforced rubber or rubber like substance. .. Comminution The breaking, crushing, or grinding of coal, ore, or rock.
BUIL])ING STON.E WA DNR
stone, which includes dimension stone, flagstone, rubble, rough building stone, terrazzo .. the quarry; ofter crushing, the wholesale market price ranges from $13.00 to $20.00 per ton . hord rock quarrying methods ore not required to mine it.Get Price