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红庆梁煤矿机头转载硐室为弱胶结软岩大硐室,机头转载硐室与煤仓、驱动硐室连接,硐室结构复杂,断面跨度大,支护困难。采用FLAC3D对机头转载硐室支护后硐室围岩和支护结构的稳定性进行数值分析,得出:机头转载硐室与煤仓、驱动硐室连接区域的顶板围岩位移量较大,需要加强顶板支护强度;两帮塑性区厚度较大,而且两帮锚杆受力较为明显;煤仓过软弱煤层段和煤仓接口处砌碹法向应力较大;对硐室群围岩大变形区域和支护结构薄弱点设置矿压监测点,监测机头转载硐室群的稳定性及时采取补救措施。
The caving chamber of Hongqiangliang Mine is a weakly cohered soft cavern, and the reheating chamber is connected with the coal bunker and drive chamber. The chamber has complicated structure and large section span, which makes it difficult to support. FLAC3D is used to analyze the stability of the surrounding rock and supporting structure of the post-caving chamber and the relation between the displacement of surrounding rock of the roof of the caisson and the coal bunker and the drive chamber is bigger Large, the need to strengthen the roof support strength; two plastic thicker zone, and the two groups of anchor stress is more obvious; coal over the soft coal seam and the coal warehouse interface quarry more normal stress; for the chamber group The rock mass monitoring points are set in the large deformation area of surrounding rock and the weak point of the supporting structure to monitor the stability of the headstock chamber and take remedial measures in time.