Abstract:
Impact ground pressure in complex high stress area is high and has large destructive energy, which greatly affects coal mine production. Taking the prevention and control of impact ground pressure in 7303 working face of Zhaolou coal mine as an example, we analyzed the site through stress detection, CT inversion analysis and microseismic detection, and meanwhile analyzed the effect of media large-diameter drilling holes in unloading pressure. By analyzing the impact danger influencing factors in the initial mining stage of 7303, a complex high-stress mining support model is established, and the lateral support pressure influencing range of 7303 mining hollow area is calculated to be 134 m, and the peak stress is 67 m away from the coal wall, and the peak stress is 78 MPa, and targeted measures for releasing the impact are put forward.