摘要
为研究高水平应力巷道宽高比对围岩变形的影响,以某矿42103工作面为研究背景,利用FLAC~(3D)软件,模拟巷道宽高比对围岩应力状态、剪切破坏程度和位移量变化的作用。模拟结果表明,高水平应力作用下,巷道宽高比越大,围岩应力集中程度越小且不容易出现拉应力,分布更为合理,顶板剪切应变集中范围更小;剪切应变较高区域主要集中于两顶角位置,相对孤立,对顶板的剪切效应较低;顶板位移随宽高比变化不敏感,而两帮的位移随着宽高比的增加而逐渐减小,减小的幅度比较大。现场应用后,巷道围岩没有发生明显变形和离层,稳定性程度大大增强。
In order to study the influence of width-height ratio of roadway with high horizontal stress on the deformation of surrounding rock,FLAC3D software was used to simulate the stress state,shear failure degree and displacement of surrounding rock with 42103 working face of a mine.The simulation results showed that under the action of high level stress,the larger the roadway width-height ratio,the smaller the stress concentration of the surrounding rock and the less tensile stress occurred,and the more reasonable the stress distribution of the surrounding rock.The concentration range of shear strain on the roof was small⁃er,the area with higher shear strain was mainly concentrated in the two top corners,and the area with high⁃er shear strain was relatively isolated,and the shear effect on the roof was low.The displacement of the roof was not sensitive to the change of the aspect ratio,while the displacement of the two gangs gradually decreas⁃es with the increase of the aspect ratio,and the reduction amplitude was relatively large.After the field ap⁃plication,the surrounding rock of the roadway has no obvious deformation and separation,and the stability is greatly enhanced.
作者
李晓旭
杜俊文
刘旭东
张耀耀
石蒙
LI Xiaoxu;DU Junwen;LIU Xudong;ZHANG Yaoyao;SHI Meng(Wuhai Energy Co.,Ltd.CHN Energy Group;CCTEG Tiandi Science&Technology Co.,Ltd.)
出处
《现代矿业》
CAS
2024年第5期93-96,共4页
Modern Mining
关键词
地下矿山
高水平应力巷道
围岩变形
FLAC~(3D)
数值模拟
underground mine
roadway with high horizontal stress
surrounding rock deformation
FLAC3D
numerical simulation
