关键词: 采动影响, 巷道塑性区, 围岩控制, 非对称破坏, 矿山压力

Abstract: In order to study the deformation and failure law of the soft rock roadway under the influence of repeated mining in the fully mechanized top-coal caving face of thick coal seam, taking the 42203 fully mechanized top-coal caving face of Burtai Coal Mine as the engineering background, the deformation and failure characteristics and failure mechanism of the roadway under the influence of repeated mining in the 42203 auxiliary haulage roadway were studied by means of site survey, monitoring and numerical simulation, and the surrounding rock control technology of the soft rock roadway under the influence of repeated mining was proposed. The results show that the deformation of the two sides of the 42203 auxiliary haulage roadway is greater than the deformation of the top and bottom, and the strata behaviors violently, and the influence range of mining advance can reach 110m; Due to the change of roadway stress field caused by repeated mining, the plastic zone changed from approximately symmetric failure to asymmetric failure; The failure mechanism of repeated mining roadway is revealed, and the secondary reinforcement and support scheme for surrounding rock is proposed by using high-strength anchor cable. According to the field measurement, the scheme effectively slows down the deformation speed and total deformation of surrounding rock, meets the requirements of roadway stability, and has good effect, providing reference for the control of surrounding rock of repeated mining soft rock roadway.