Anhui Wanbei Coal Power Group Co.LTD
North China Institute of Science and Technology

以朱集西煤矿11煤轨道大巷为工程背景,采用理论分析、数值模拟等方法,结合现场实际条件,提出了“注浆加固与高强度高预应力锚杆及钻孔卸压相结合”的协调控制技术并在现场应用。结果表明,轨道大巷围岩变形受最大剪应力为主,对大巷围岩稳定性的影响从大到小为:构造应力、巷道埋深、支护密度、支护长度。将优化后的大巷加固方案进行数值模拟验证,大巷垂直应力最大为23.73MPa,锚杆索受力明显降低,大巷帮部和底板的塑性区范围减小,进行钻孔卸压后,应力集中带转移至钻孔周围,最大应力降低为22.5MPa,围岩稳定性较好。结合现场试验结果表明,所提出的修复加固方案能够有效地控制住围岩形变。

Based on the engineering background of 11 coal track roadway in Zhujixi Coal Mine,the coordinatedcontrol technology of " Grouting reinforcement is combined with high strength and high prestress anchor andborehole pressure relief" is proposed by theoretical analysis,numerical simulation and other methods combinedwith the actual field conditions and applied in the field.The results show that the deformation of roadway surrounding rock is mainly affected by the maximum shear stress,and the order of influence on the stability ofroadway surrounding rock is: tectonic stress;Depth of roadway;Support density t;Support length .The optimized roadway reinforcement scheme is verified by numerical simulation.The maximum vertical stress of theroadway is 23.73MPa,the stress of the anchor cable is significantly reduced,and the plastic zone range of theroadway side and bottom is reduced.After the pressure relief of the borehole,the stress concentration zone istransferred to the area around the borehole,and the maximum stress is reduced to 22.5MPa.Combined with1the field test results,the proposed restoration and reinforcement scheme can effectively control the deformationof surrounding rock in the chamber.

国家自然科学基金面上项目(52274081);河北省自然科学基金面上项目(E2021508011);河北省科学技术研究“青年拔尖人才”项目(BJ2020208)

马力,殷帅峰,刘志高 .深部高水平应力巷道协调控制技术研究[J].华北科技学院学报,2023,20(6):1-7

MA Li,YIN Shuaifeng,LIU Zhigao.Research on coordinated control technology for deep high-level stress tunnels[J].Journal of North China Institute of Science and Technology,2023,20(6):1-7