Method for preventing and treating coal mine hard top rock burst through ground composite fracturing

The invention belongs to the technical field of coal mining, and particularly relates to a method for preventing and treating coal mine hard top rock burst through ground composite fracturing, the method belongs to the technical field of coal mining, chemical weakening of a target rock stratum is achieved through mud acid acidification, and the target rock stratum is physically fractured in combination with large-displacement hydraulic fracturing; the rock stress concentration phenomenon of the extremely thick and hard roof above the coal seam is reduced or eliminated, and the purpose of preventing roof impact disasters during coal seam mining is achieved. 本发明属于煤炭开采技术领域，尤其涉及一种地面复合压裂防治煤矿硬顶冲击地压的方法，本发明属于煤炭开采技术领域，通过土酸酸化以达到对目标岩层的化学弱化，结合大排量水力压裂物理致裂目标岩层，减少或消除煤层上方巨厚坚硬顶板岩石应力集中现象，达到煤层开采时防治顶板冲击灾害的目的。