摘要
为解决深部断裂带巷道围岩破碎、变形速度快、持续时间长、底鼓量大等变形问题,以东周窑煤矿断裂带4^(#)层辅运巷为工程背景,分析总结了断裂带巷道底鼓形成关键因素,提出了锚杆+锚梁+钢筋网+初喷混凝土+底板二衬混凝土的综合稳控技术。通过精细数值仿真分析了常规网喷支护与综合稳控技术的巷道围岩变形分布特征。结果表明:该综合稳控技术能够有效控制围岩变形,两帮收敛量降低了46.3%,顶板下沉量减小了53.4%,底鼓量减小了83.3%,变形控制效果极佳。
In order to solve the deformation problem of the roadway in the deep fault zone,such as broken surrounding rock,fast deformation speed,long duration and large bottom load,taking the 4^(#)layer auxiliary transportation roadway in the fault zone of Dongzhouyao Coal Mine as the engineering background,the key factors for the formation of roadway floor heave in the fault zone are analyzed and summarized.The comprehensive stability control technology of anchor+anchor beam+steel mesh+initial shotcreting concrete+second lining concrete of floor is put forward.The distribution characteristics of roadway surrounding rock deformation of conventional mesh shotcreting support and comprehensive stability control technology are analyzed by fine numerical simulation.The results show that the integrated stability control technology can effectively control the surrounding rock deformation,the convergence of the two sides is reduced by 46.3%,the roof subsidence is reduced by 53.4%,and the bottom sink is reduced by 83.3%.The deformation control effect is excellent.
作者
石艳阳
Shi Yanyang(Jinneng Holding Coal Industry Group Tongfa Dongzhouyao Coal Industry Co.,Ltd.,Shanxi Datong 037100)
出处
《山东煤炭科技》
2022年第6期13-15,18,21,共5页
Shandong Coal Science and Technology
关键词
巷道
断裂带
变形
支护
roadway
fault zone
deformation
support
