准确判断断层导水性是现阶段工程实践中防治断层水害的关键和难点之一；目前判断断层导水性的技术方法主要有现场探查和理论分析，然而受成本高、耗时长，理论分析不细致等困扰，地下工程施工过程中断层水害事故频发。选取断层的含水层对接比率（ADR）、泥岩涂抹系数（SSF）、断面紧闭指数（I_σ）、泥岩塑性指数（I_m）、水岩应力作用指数（I_w）、断距（D_f）、断层倾角（θ）7个断层导水性主控因素，运用IFAHP-CRITIC组合赋权，构建断层导水性多因素耦合预测模型，提出断层导水性指数新概念，并将模型成功应用于蒋庄煤矿王庄断层和小宋楼断层天然状态下导水性定量精细评价；采用流固耦合数值模拟，揭示了13_上09、13_下21工作面近距离双煤层开采重复扰动下断层导水性演化规律。结果表明：天然状态下王庄断层大部属于较弱导水性区，强导水性区主要位于断层北部−200~−350 m标高处，开采工作面附近王庄断层导水性较弱；小宋楼断层的导水性具有分带性，由深部向浅部导水性逐渐增强，开采工作面附近小宋楼断层导水性较弱；王庄断层和小宋楼断层仅13_上09工作面开采时断层束内均未发生明显扰动；模拟13_上09、13_下21工作面开采2条断层内均发生局部扰动破坏，但均未与开采工作面围岩破坏区联通，工作面开采不会导致断层“活化”突水。

Accurate determination of the hydraulic conductivity of faults represents a pivotal and challenging task in mitigating water-related damage in faults within contemporary engineering practice. At present, the main technical methods to judge fault conductivity are field exploration and theoretical analysis. However, due to the high cost, long time-consuming, and lack of detailed theoretical analysis, fault water damage accidents occur frequently during the construction of underground projects. Seven main controlling factors of fault conductivity including aquifer docking ratio (ADR), mudstone smearing factor (SSF), section tightness index (I_σ), mudstone plasticity index (I_m), water-rock stress index (I_w), fault distance (D_f) and fault inclination angle (θ) were selected and weighted by IFAHP-CRITIC combination. The multi-factor coupling prediction model of fault conductivity is constructed, and a new concept of fault conductivity index is proposed. The model has been successfully applied to the quantitative and fine evaluation of water conductivity of Wangzhuang fault and Xiaosonglou fault in the natural state of Jiangzhuang Coal Mine. By using fluid-structure coupling numerical simulation, the evolution rule of fault conductivity under repeated disturbance of close double coal seam mining in 13 upper 09 and 13 lower 21 working faces is revealed. The results show that most of Wangzhuang faults in the natural state belong to the weak water conductivity area, the strong water conductivity area is mainly located at the elevation of-200 to -350 m in the north of the fault, and the water conductivity of Wangzhuang fault near the mining face is weak. The conductivity of Xiaonglou fault is zonal and gradually increases from deep to shallow. The conductivity of Xiaosonglou fault near the mining face is weak. There was no obvious disturbance in the fault bundle during the mining of 13 upper 09 working face. It is simulated that local disturbance failure occurs in the two faults of 13 upper 09 and 13 lower 21 working faces, but they are not connected with the surrounding rock failure area of the mining face, and the mining of the working face will not lead to “activate” water inrush.