文献类型：期刊文献

中文题名：深部高应力沿空掘巷非对称支护技术

英文题名：Asymmetrical Supporting of Gob-side Entry Driving in Deep Roadway with High Stress

作者：郑伟

第一作者：郑伟

机构：[1]贵州理工学院矿业工程学院

第一机构：贵州理工学院矿业工程学院

年份：2017

卷号：48

期号：11

起止页码：88-91

中文期刊名：煤矿安全

外文期刊名：Safety in Coal Mines

收录：北大核心:【北大核心2014】；

语种：中文

中文关键词：深部巷道;高应力;沿空掘巷;非对称支护;数值模拟

外文关键词：deep roadway;high stress;gob-side entry driving;asymmetric supporting;numerical simulation

摘要：为了解决深部高应力影响区沿空掘巷支护难题,以郭屯煤矿-808 m四采区辅助轨道巷为例,分析了巷道变形破坏特征及其影响因素,提出采用"高强高预应力让压锚杆+锚索+金属网+带梯"的非对称锚网索支护方案,并对支护方式和支护参数进行优化。采用有限差分软件FLAC3D,对深部高应力扰动围岩沿空掘巷所采用的非对称支护方案进行了数值模拟,与原方案相比,巷道围岩应力显著降低,顶底板和两帮收敛变形得到有效控制。现场应用及观测结果表明,在深部高应力影响区沿空掘巷采用非对称锚网索支护技术,对围岩应力重新分布起到了较好的作用,达到了理想的巷道围岩控制效果。
In order to solve difficult support problems of gob-side entry driving in deep high stress disturbance of surrounding rock, an example of the fourth mining area auxiliary track tunnel in-808 m of Guotun Coal Mine is presented, through analyzing the roadway surrounding rock deformation and failure characteristics and influencing factors of the deformation, the ＂the high strength and high pretension yieldable bolt ＋ anchor ＋ metal mesh ＋ ladder＂of asymmetric network and cable support scheme is proposed to optimize the supporting ways and supporting parameters. By using the finite difference software FLAC3 D, the numerical simulation is carried out for gob-side entry driving in the deep high stress disturbance surrounding rock. The stress of the surrounding rock is significantly lower than that of the original scheme, and the deformation of top and floor and the two walls are effectively controlled. The field application and observation results show that the stress distribution of the surrounding rock of the tunnel is better than that of the non-symmetrical anchor net.