鹤煤集团寺湾煤矿断层导水通道综合分析及治理

鹤煤集团寺湾矿由于受F8断层影响,断层东翼奥灰水侧向补给西翼二灰含水层,使该矿水文地质条件复杂化,存在突水隐患。采用瞬变电磁勘探、地质钻探、放水试验等手段进行综合分析,查明F8断层导水通道的具体位置。通过地面帷幕注浆,封堵断层带附近二灰岩裂隙,沿断层西盘形成一道连续的阻水帷幕,切断奥灰水对二灰水的补给通道,降低矿井的排水量。通过注浆,奥灰水通过F8断层侧向补给西翼二灰的水量由原来的802m3/h减少到202m3/h,断层堵水率为74.8%,堵水效果明显。该研究对今后矿井水害治理,具有一定的参考意义。

Comprehensive Analysis and Governing of Water Conducted Fault in Siwan Coalmine,Hebi Coal Group

In the Siwan coalmine of Hebi Coal Group because of impact from fault F8, Ordovieian limestone water from east side of the fault laterally recharges west side No.2 limeslone aquifer have made coahnine hydrogeological condition complicated with hidden haz- ard of water bursting. Based on transient electromagnetic prospecting, geological drilling and dewatering test results carried out compre- hensive analysis, found out actual location of Fs fault water conducted channel, Using surface curtain grouting, plugged fissures in No.2 limeslone near the fault, along the west side of the fault formed a continuous water blocking curtain, cut off Ordovician limestone water recharging channel to No.2 limestone aquifer, lowered down eoalmine displacement of water. Through the grouting, the recharging vol- ume of OrdovMan limestone water reduced fl＇om original 802m3/h to 202m3/h, fauh plugging rate 74.8%, thus a good performance. The study has certain reference value in mine water governing henceforth.