深井巷道断层涌水探查与封堵治理

针对某矿-808 m胶带巷变坡点以下15 m处集中出水点、涌水段落岩体破碎、围岩稳定性差、长年涌水严重影响胶带运输和巷道安全、增加了矿井的排水费用等情况，通过分析该矿的工程地质和水文地质条件，确定涌水水源为M5细砂岩含水层，巷道切割M5砂岩导致顶板涌水，涌水类型为断层导通型；运用瞬变电磁法和高密度电法综合物探与水力连通试验，确定了涌水来源及主要通道分布情况；应用Visual MODFLOW(VMF)数值模拟方法对地下水流场及运移情况进行了分析，提出“深部截源、浅层加固”封堵治理思路；最终确定了包含注浆钻孔设计、注浆参数选择等治理方案，方案在现场得到实施；运用涌水量对比法进行注浆效果评价，注浆封堵治理取得显著效果。该研究成果对类似工程具有一定的指导意义。

Fault Water Gushing Exploration and Plugging Management in Deep Mine Roadway

Aim at the situation of the inflow point focuses at 15 m below the changing point of -808 m belt roadway in a mine.In the inflow area，rock mass is broken and the stability of surrounding rock is poor.The gush-out water endangers the underground safety and increases the cost of mine drainage.Through the analysis of engineering geology and geohydrologic conditions，the source of water is determined as sandstone M5 aquifer.This sandstone M5 had been cut by roadway，which results in the roof water gushing with fault conductivity type.The synthetic geophysical techniques and hydrological connected tests based on the transient electro-magnetic(TEM)method and the high-density electric method are made to find out the source of water gushing and the distribution of main channels.The Visual Modflow groundwater seepage simulation software is employed to analyze the underground water yield and its movement.And the plugging idea of the “deep cutting and shallow reinforcement” was proposed.Finally，the management schemes including grouting drilling design and parameter selection were determined and then implemented in the field.Grouting effect is evaluated with water inflow contrast method，obtaining that grouting has a remarkable performance.The research results have certain guiding significance for the similar engineering.