π型钢循环迈步支架在开采中厚煤层中的应用

Application of π Steel Stent in Mining Medium to Thick Coal Strata

摘要:

在中厚煤层开采中，通过改进采煤工艺，采用π型钢循环迈步式支架代替高档炮采工作面常规的铰接顶梁支护工艺，在减少煤炭丢失的同时提高了资源回收率，也杜绝了老空区因丢失的煤炭自燃而引发的矿井火灾。

Abstract:

In mining medium to thick coal strata, π steel stent is used to instead the hinged roof beam supporting technology in high[CD*2]grade coal face of conventional artillery, the loss of coal resource is reduced, recovery rate is promoted and caused the spont