五沟煤矿F16断层井下钻探及压水试验

Underground drilling exploration and water pressure test of F16 fault in Wugou Coal Mine

五沟煤矿F16断层位于矿井西北部,大型正断层,落差30~150m,在矿井内走向长度约2.24km。1031工作面风巷靠近F16正断层,沿断层上盘断防煤柱线掘进,由于受F16正断层影响,上盘10煤层与下盘太灰间距进一步缩短,受采动影响,存在一定的太灰水突水威胁。通过井下钻探及压水试验进一步探测F16断层位置、落差及赋导水性,取得了F16断层的透水率及渗透系数等水文地质参数,为合理留设F16断层断防煤柱提供了关键依据。

F16 fault in mine northwest of Wugou Coal Mine is a large normal fault, and the fall is 30 ~ 150m, and the strike length in mine is about 2. 24km. The air gateway of 1031 working face is near F16 fault, and the driving is along the hanging fault waterproof pillar line. Because of the influence of F16 fault the spacing between hanging 10 seam and footwall Taiyuan limestone shortened, and there is Taiyuan limestone water bursting threat due to the mining influence. Through further detecting the position, the fall and water conductivity of FI6 fault by underground drilling exploration and water pressure test, the permeability rate and permeability coefficient were got, which provided key basis for the reasonable setting of fauh waterproof pillar of F16 fault.