特厚煤层综放工作面矿震诱发机理及防控技术：以龙王沟煤矿为例

针对陕蒙地区矿井普遍具有煤层埋深大、厚度大、顶板坚硬，开采过程中不易及时垮落，造成矿震现象频发等特点，以龙王沟煤矿特厚煤层综放工作面为工程背景，通过对典型厚硬顶板条件下矿压显现特征和主控因素的分析，采用理论分析、现场实测和工程实践相结合的方式对厚硬顶版破断型矿震诱发的因素和防控技术进行了探讨。认为工作面出现矿震现象主要是高位顶板坚硬岩层采后不易及时垮落等单一或多因素耦合作用影响，应力叠加传递造成的，关键应从两顺槽及回撤通道对工作面高位坚硬顶板进行处理，避免弹性能的集聚与传播、阻断应力传递路径，通过水力压裂等人工干预的方式改变来压步距，减少悬顶结构、提前释放能量，从源头上减弱矿震发生频次及危害程度，进而实现采场围岩稳定性控制，为坚硬顶板条件下矿震防治技术提供理论借鉴。

Mechanism and prevention and control technology of mine earthquake in fully mechanized top coal caving face in extra thick seam

In view of the characteristics of coal mines in Shaanxi and Inner Mongolia, such as large coal seam burial depth, large thickness, hard roof, difficult to collapse in time during mining and frequent occurrence of mine tremors, taking the fully mechanized top coal caving face in a coal mine with extra thick coal seam as the engineering background, through the analysis of the characteristics and main control factors of rock pressure under the conditions of typical thick and hard roof, theoretical analysis The factors and prevention and control technology of thick and hard roof broken type mine shock are discussed by combining field measurement with engineering practice. It is believed that the mine shock phenomenon in the working face is mainly caused by single or multiple factors such as hard rock strata of high roof are not easy to collapse in time after mining, and caused by stress superimposition and transmission. The key is to deal with the high hard roof of the working face from two gateways and withdrawal channels to avoid the accumulation and propagation of elastic properties Block the stress transmission path, change the weighting step distance through manual intervention such as hydraulic fracturing, reduce the suspended roof structure, release energy in advance, reduce the occurrence frequency and hazard degree of mine shock from the source, and then realize the stability control of the surrounding rock of the stope, providing theoretical reference for the prevention and control technology of mine shock under the condition of hard roof.