关键词: 煤层顶板, 导水裂隙带, 微震监测, 发育高度

Abstract: Abstract：As the basic parameter of mine, the development height of water-conducting fracture zone in roof of coal seam plays an important role in mine disaster prevention. Based on the crack evolution law of different stages in the stress-strain curve and acoustic emission characteristics of rock, the feasibility of microseismic monitoring technology to determine the height of water-conducting fracture zone was analyzed. A microseismic system was built around the 1604 caving top coal face of Guhanshan coal mine, and the results show that the damage degree of the direct roof and the old roof of the working face is much higher than that of the overlying strata. The continuous failure area of the roof is a "blunt triangle" and the development height of water-conducting fracture zone is about 75 m. The numerical simulation results show that the height of roof water-conducting fracture zone in the working face 1604 is about 71 m. The results based on microseismic monitoring analysis are verified, which provides a new method for measuring the height of roof water-conducting fracture zone in coal mine.