为解决煤矿工作面在推采过程中遇到具有复杂原岩应力环境及受采动活化影响的断层带时，面临顶板与煤壁支护困难,停采停面加固破碎围岩开采效率低,开采成本高与安全性差等系列问题，采用UDEC数值模拟方法建立了工作面断层活化模型，分析了断层构造带区域原岩应力分布特点，工作面开采过程中断层活化过程及期间岩体裂隙发育演化规律，提出了从被动过断层到超前工作面预注浆加固断层构造带的断层治理思路，确定了静、动压2阶段分步预注浆的合理有效距离为超前工作面300～400 m和30～50 m。通过对断层构造带平行与扇形注浆孔的分级递进式布置、高压注浆设备的计算选型与泵效校检、“两堵一注+排气管”耐高压(15～20 MPa)定位封孔方式的设计与强度验算，形成了帷幕注浆(0～10 m孔)、浅孔注浆(10～30 m孔)、中深孔注浆(30～80 m孔)和预留深孔注浆(80～130 m孔)相结合的静动压分步耦合预注浆断层带加固关键技术，实现了注浆压力5～15 MPa、注浆流量0～6 m3/h、注浆范围0～150 m的远距离高压注浆，达到了超前工作面30～400 m预注浆加固断层破碎带煤岩体的目的。该技术在淮南矿区成功推广应用，工作面过断层期间无片帮、顶板无冒落，支架工作状态稳定，工作面巷道支护状况良好；工作面推进速度6 m/d左右，效率提高1～2倍，实现了工作面过断层不停面连续化高效回采。

When the working face of the coal mine encounters a fault zone with complex original rock stress environment affected by mining activation during the mining process, in order to solve a series of problems such as difficulties in roof and coal wall support, low mining efficiency of broken surrounding rock, high mining cost and poor safety when stopping mining and stopping face reinforcement, the UDEC numerical simulation method was used to establish a working face fault activation model.The stress distribution characteristics of the original rock in the fault structural belt, the activation process of the fault during the mining process of the working face, and the development and evolution law of the rock mass fracture during the mining process were analyzed and it was determined that the reasonable and effective distances of the two-stage pre-grouting of static and dynamic pressure were 300-400 m and 30-50 m ahead of the working face.Through the grading and progressive arrangement of parallel and fan-shaped grouting holes in the fault structure zone, the calculation and selection of high-pressure grouting equipment and pump efficiency check, and the design and strength check of “two blocks, one injection+exhaust pipe” high pressure (15-20 MPa) positioning sealing method,the combined hydrostatic and dynamic pressure multi-step coupling pre-grouting key fault zone reinforcement technology including curtain grouting (0-10 m hole), shallow hole grouting (10-30 m hole), medium and deep hole grouting (30-80 m hole) and reserved deep hole grouting (80-130 m hole) was formed.The long-distance high-pressure grouting with grouting pressure of 5-15 MPa, grouting flow of 0～6 m3/h and grouting range 0～150 m has been realized, and the goal of 30～400 m pre grouting in advance working face to strengthen the coal and rock mass in the fault fracture zone has been achieved. The technology has been successfully applied in HuainanMining Area. When the working face passes through the fault,there is no rib spalling and roof fall, the working condition of the support is stable, and the supporting condition of the gateway is good during working face passing fault. The advancing degree of the working face is about 6 m/d, and the efficiency is increased by 1-2 times, realizing the continuous and efficient recovery of the working face across the fault without breaking the face.