连续采煤机房柱式采煤法工作面生产能力的确定
Determination of productive capacity of Coalface in room and pillar method with continuous miner
对于具有坚硬顶板的煤层，过去比较普遍采用的是刀柱式采煤法。
For the seam of hard roof , the knife pillar mining method is widely used in the past .
柱式采煤法柱式采煤法柱式采煤法