关键词: 运输大巷, 过断层, 构造带, 预注浆, 新型注浆锚杆

Abstract: In the deep well state, the soft rock engineering problem has become an important engineering problem in the current deep mining. In this paper, the -980m cavern group of Xinhe Coal Mine is taken as the research background. Through theoretical analysis, the influence of different sequential excavation of adjacent chambers on surrounding rock failure is studied. Combined with FLAC3D numerical simulation software, different excavation sequences of adjacent chambers are simulated. And the minimum damage volume VP is calculated in the shaping zone, so it is concluded that the optimal construction scheme is BA2A3A1A4A5. Provide support design for the cavern group, it is suggested that bolting net , grouting anchor rope, whitewashing and grouting reinforcement should be adopted in the main part of pump house, in later stage can use steel reinforced concrete masonry lining for combined support; And it is suggested that bolt wire cable , shotcret and grouting reinforcement should be adopted in the niche，and in later stage can use steel reinforced concrete masonry lining for combined support. The supporting scheme is simulated by using FLAC3D numerical software, calculation results show that, the top, bottom and two sides of the chamber are effectively controlled. The results of field monitoring were analyzed, and the result shows, the maximum displacement of the two sides of the monitoring section is 8mm, and the maximum displacement of the top and bottom plates is 15mm. This suggests that the overall maintenance and support effect of the roadway is good, which can effectively control the surrounding rock and has good application value.