针对冲击地压局部卸压范围小，连续性低，作业风险高等问题，开展煤层厚硬顶板井上下千米顺层钻孔区域压裂防冲系统与工程应用研究。结果表明，从加载条件来分，顶板主导型冲击地压可分为动静载荷叠加型、高静载荷加载型、高静载荷卸荷型三种类型；厚硬顶板是采掘围岩冲击地压启动区域性静载荷、动载荷供给主体，以提供冲击启动动静载荷源的厚硬顶板为靶点，提出建立煤层顶板地面、井下千米水平孔分段致裂卸压系统，开展顶板千米顺层钻孔区域压裂。通过井上下提前破坏冲击危险区域上覆顶板的完整性，使得载荷向更完整顶板区域迁移，从而为井下掘进、回采提供低应力作业大环境，也使得冲击地压丧失启动的重要载荷条件。分别进行了工作面开采前地面水平井顶板区域压裂防冲技术试验；工作面开采过程中井下巷道水平孔顶板区域压裂防冲技术试验，实践效果显著，形成了冲击地压建设矿井“先压后建”，生产矿井“先压后掘、先压后采”新的灾害防治模式。

To solve the problems of small local relief range, low continuity and high operational risk of rockburst, regional hydro-fracking and burst prevention system and engineering application research were carried out within thick and hard roof of a coal seam by well over thousand meters on and under the ground. The results show that, according to the loading conditions, the roof dominated rockburst can be divided into three types: superposed dynamic and static loading type, high static loading type and high static unloading type; The thick and hard roof is the main source of regional static and dynamic loading for rock burst initiation of mining surrounding rock. With the thick and hard roof as the target, which provides the source of dynamic and static load for rock burst initiation, a segmented fracturing pressure relief system for the roof with 1 000 meter horizontal holes on and under the ground was established and fracking was carried out in this area. By destroying the integrity of the overlying roof in the burst prone area in advance on and under the ground, the load is transferred to the more intact roof area, so as to provide a low stress operational environment for underground excavation and extraction, and also make the rock burst initiation conditions inapplicable. The fracking and burst control tests on the roof area using the horizontal well drilled on the ground before the extraction of the panel, and underground drilling from the entries during the extraction were carried out respectively. Remarkable results have been achieved in practice, forming a new disaster prevention and control mode of “fracking before construction” for burst prone coal mines under construction, and “fracking before tunneling, fracturing before mining” for the producing coal mines.