关键词: 承压水, 断层活化, 煤柱留设, 相似材料试验

Abstract: In order to strengthen the prevention and control of mine water disasters and ensure the safe mining of the mine, based on the actual geological conditions of the 1026 working surface of Wugou Coal Mine, this paper uses the method of combining indoor similar material simulation test with FLAC3D software simulation for the problem of the work surface back-to-back to induce the activation of burst water. The activated characteristics of faults under the influence of work surface mining and coal column retention were studied. The results show that with the continuous progress of the working surface, when the dF68 fault lower plate waterproof coal column is less than 20m, the degree of DF68 fault activation is obviously increased, and the threat of surface burst water will be greater; The permeable characteristics and the retention of the fault waterproof coal column are systematically analyzed, and the minimum retention width of the DF68 fault waterproof coal column is obtained, and on this basis, combined with similar material test, numerical simulation and theoretical calculation, the comprehensive analysis determines that the width of the waterproof coal column under the DF68 fault is set to 20m. The width can further improve the recovery rate of resources on the basis of ensuring the safety of work surface recovery.