阶梯式导水断层带探查及水害防治技术

Exploration of stepped water conducting fault zone and water disaster prevention technology

对于底板奥灰水带压开采矿井,在采掘过程中针对其隐伏导水构造的探查与治理是矿井防治水的重点。以黄玉川煤矿6上煤二水平辅运大巷掘进过DF6断层带水害探查与治理工程为例,采用钻探、化探、放水试验等方法,查明DF6断层带为多个断层组成的阶梯式断层带,断层带富水并受到底板奥灰水的补给;采用超前钻探结合帷幕注浆的方法,施工了15个注浆治理钻孔及3个检验孔,对6上煤二水平辅运大巷顺利掘进前方DF6断层带进行治理,治理效果良好,有效保障了6上煤二水平辅运大巷过断层带时的掘进安全。

For the mine that mining under safe water pressure of aquifer with Ordovician limestone water on the floor, the exploration and treatment of the hidden water diversion structure in the mining process is the focus of water disaster prevention and control. Taking the water hazard exploration and treatment project of No.6 upper coal seam two-level auxiliary transportation roadway driving through DF6 stepped fault zone in Huangyuchuan Coal Mine as an example, by means of drilling, geochemical prospecting and outflow test, it is found that DF6 fault zone is a stepped fault zone composed of multiple faults. The fault zone is rich in water and is replenished by Ordovician limestone water from the floor. Using the method of advanced drilling combined with curtain grouting, 15 grouting treatment boreholes and 3 inspection holes were constructed to treat the DF6 fault zone in front of the smooth excavation of No.6 upper coal seam two-level auxiliary transportation roadway. The treatment effect is good, which effectively ensures the safety of the excavation of No.6 upper coal seam two-level auxiliary transportation roadway through the fault zone.