受掘进扰动影响的巷道围岩稳定性控制研究  

Study on stability control of surrounding rock of roadway affected by driving disturbance

作　　者：张斌[1] 苏学贵[1,2] 段振雄 常立宗 王福周 ZHANG Bin;SU Xuegui;DUAN Zhenxiong;CHANG Lizong;WANG Fuzhou(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Deep Geotechnical Mechanics and Underground Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083

出　　处：《矿业安全与环保》2020年第6期19-24,31,共7页Mining Safety & Environmental Protection

基　　金：国家重点实验室开放基金项目(SKLGDUEK1820)。

摘　　要：龙泉煤矿胶带大巷受回风大巷掘进扰动影响变形严重,探明巷道间的扰动影响规律、优化巷道支护方案对稳定控制巷道围岩变形尤为重要。采用原位实测、FLAC 3D数值分析及井下监测等方法,对掘进扰动影响的巷道围岩稳定性进行了研究,根据数值分析和现场原位实测结果,提出了巷道支护优化方案。研究结果表明:巷道较浅部围岩在扰动影响下裂隙增加、位移量增大;当巷道间距为45 m时巷道围岩基本不受扰动影响,间距为35 m时受扰动的影响较小;当巷道间距为25 m时巷道围岩受扰动的影响明显,左、右两帮的移近量比间距45 m时高出52.4%、22.0%,且左帮移近量高出右帮24.5%,而间距为15 m时巷道破坏严重;巷道间距由25 m增加到35 m可使围岩塑性区减小53.1%,但当巷道间距(25 m)不宜变化时,通过优化支护参数亦可使围岩塑性区减少45.6%,优化方案经工程应用验证既经济合理又满足安全生产要求。The belt roadway in Longquan Coal Mine is seriously deformed by the influence of the return airway driving disturbance.It is particularly important for stable control of roadway surrounding rock deformation to explore the disturbance influencing rules between roadways and optimize the scheme of roadway support.The in-situ measurement,FLAC 3D numerical analysis and underground monitoring were used to study the influence of driving disturbance on the stability of surrounding rock,based on the numerical analysis and in-situ measurement results,the optimization scheme of roadway support was put forward.The results show that:under the influence of disturbance,the fracture and displacement of shallow surrounding rock increase;when the distance between roadways is 45 m,the roadway surrounding rock is basically unaffected by disturbance,while when the distance is 35 m,the disturbance has little influence;when the distance of roadway is 25 m,the roadway surrounding rock is obviously affected by disturbance,the approach of left and right sides is 52.4% and 22.0%higher than that of 45 m,and the left side is 24.5% higher than the right side,while when the distance is 15 m,the roadway is seriously damaged;when the distance between roadways increases from 25 m to 35 m,the plastic zone of surrounding rock can be reduced by 53.1%,but when the distance between roadways(25 m)is not suitable to change,the plastic zone of surrounding rock can also be reduced by 45.6% by optimizing the support parameters.The optimization scheme is proved to be economic and reasonable by engineering application,and meets the requirements of safety production.

关 键 词：煤矿巷道 掘进扰动 原位实测 井下监测 数值分析 支护参数优化 围岩稳定性控制 

分 类 号：TD322.4[矿业工程—矿井建设]