深井窄煤柱沿空掘巷非对称支护技术应用研究  

Research on application of asymmetric supporting technology of gob-side entry driving of narrow coal pillar in deep well

作　　者：张杨 诸葛长华 ZHANG Yang;ZHUGE Changhua(School of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《矿业安全与环保》2021年第1期64-68,74,共6页Mining Safety & Environmental Protection

基　　金：国家重点研发计划项目(2018YFC0604705);国家自然科学基金项目(51574156)。

摘　　要：陕西高家堡煤矿-1000 m水平沿空巷道在原支护方案下顶板及两帮变形严重,部分锚杆被拉断,且两帮变形呈不对称性,煤柱侧巷帮变形明显大于实体煤侧,导致巷道不能满足生产需求。分析了原支护方案存在的主要问题,提出“高预应力让压锚杆+让压鸟窝锚索+W钢带”的非对称支护方案。采用FLAC^3D软件对采取非对称支护方案后的深井沿空巷道进行了数值模拟,结果显示:巷道顶板下沉量稳定在80 mm,巷道两帮移近量稳定在179 mm,且两帮围岩移近量大致相似,不再呈现出明显的非对称变形现象。现场应用及监测结果表明,对于深井高地压影响下的窄煤柱沿空巷道采用非对称支护技术后,巷道变形得到有效控制,达到了较好的巷道围岩控制效果。When the-1000 m horizontal gob-side entry of Shaanxi Gaojiapu Coal Mine was under the original support scheme,the roof and two sides were seriously deformed,part of the rockbolts were pulled off,and the deformation of the two sides was asymmetrical.The deformation of the roadway side of coal pillar was obviously greater than that of the solid coal side,which leads to the roadway can not meet the production demand.This paper analyzed the main problems existing in the original support scheme and put forward the asymmetric support scheme of“high pre-stressed rockbolt+pressure bird’s nest anchor cable+W steel strip”.FLAC^3D software was used to carry out numerical simulation of the gob-side entry in deep well after adopting asymmetric support scheme.The results show that the roof subsidence of the roadway is stable at 80 mm,and the displacement of the two sides of the roadway is stable at 179 mm,and the displacement of the two sides of the surrounding rock is roughly similar.There is no obvious asymmetrical deformation phenomenon.The field application and monitoring results show that after the asymmetric supporting technology is adopted for gob-side entry of narrow coal pillars under the influence of high ground pressure in deep well,the deformation of roadway is effectively controlled,and better control effect of roadway surrounding rock is achieved.

关 键 词：深井 沿空巷道 窄煤柱 数值模拟 非对称支护 

分 类 号：TD353[矿业工程—矿井建设]