液态CO_2深孔预裂对坚硬煤层回采块煤率的影响

Influence of liquid CO_2 deep hole pre-split to hard coal mining rate of lump coal

通过对煤炭开采块煤率影响因素、超前预裂对煤体结构的影响进行理论分析,得出坚硬煤层煤体内部原生裂隙的密度、长度及其贯穿性对于回采块煤率影响巨大,同时运用液态CO_2深孔预裂技术,对于提高坚硬煤体裂隙发育水平增加煤炭回采块煤率在理论是可行的。

In this paper, the influence factors of the rate of lump coal mining and the affects of advanced presplitting coal structure are theoretically analyzed,the effect of coal body structure of hard coal seam coal internal native fracture density,length, and its penetrability to the improvement of lump coal mining rate had a huge impact,liquid CO_2 deep- hole breaking technology for improving the hard coal fractured horizontal to increase the rate of lump coal is feasible in theory.