Sublevel caving technique has been utilized in Datong mining area under hard rock and hard coal, problems including low recovery ratio and spontaneous fire in gob have been overcome to achieve safe and high prodction.
英
美
- 大同煤礦集團“兩硬”條件侏羅紀厚煤層下分層工作面應用低位放頂煤開(kāi)采技術(shù),解決了傳統工藝所造成的煤炭資源回收率低、空區自然發(fā)火危險程度高等技術(shù)難題,實(shí)現了安全高效開(kāi)采的目的。
