关键词: 冲击地压, 水平井, 分段压裂, 微震监测

Abstract: In order to reduce the possible impact risk of hard roof during mining in Mengcun coal mine, the surface horizontal well and staged fracturing mature technology are applied to the prevention and control of mine rock burst for the first time. By reasonably selecting the fracturing target horizon, optimizing the fracturing process, implementing two surface L-shaped horizontal wells on the hard roof, and carrying out staged fracturing technology transformation, forming effective artificial fractures, breaking the coal seam roof and releasing the formation stress. At the same time, the method of combining the ground microseismic real-time fracture monitoring system of the whole well section with the downhole microseismic monitoring and evaluation system is used to effectively monitor the expansion range of the segmented fracture of the surface horizontal well. This technology realizes the weakening of the overlying hard roof area within the working face, and reduces the possible rockburst risk caused by the collapse of a large area of hard roof during the mining of the coal face.