基于构造应力的弱面斜穿巷道围岩变形特征  

Deformation Characteristics of Surrounding Rock in Oblique Roadway with Weak Structural Plane Based on Tectonic Stress

作　　者：谷翱翔 余伟健 潘豹[1] GU Aoxiang;YU Weijian;PAN Bao(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Coal Resources Clean-Utilization and Mine Environment Protection,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201 [3]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2023年第3期31-37,共7页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51974117;52174076);湖南省自然科学基金资助项目(2023JJ30261)。

摘　　要：为研究弱面与构造应力组合作用对巷道围岩稳定性的影响,基于贵州木孔煤矿工程地质条件,采用3DEC软件,对全断面开挖下的围岩稳定性进行数值模拟,重点分析弱面倾角与构造应力对围岩变形及位移的影响,同时对围岩变形机理进行讨论.研究结果表明:巷道开挖后,水平方向的位移均表现为向巷道中心收敛;巷道竖向位移受弱面倾角影响较大,随着弱面倾角的增大,最大位移从拱顶逐渐转移到巷道左帮;巷道两帮的变形量随着弱面倾角的变化呈现明显的不均匀变形特征,所设置的监测点显示巷道两帮的位移在特定的弱面倾角范围内表现出相反的变化趋势.该研究结果可为巷道支护设计及工程应用提供技术支撑.To study the influence of the combination of weak plane and tectonic stress on the stability of surrounding rock in tunnels,based on the engineering geological conditions of Mukong Coal Mine in Guizhou,3DEC software is used to numerically simulate the stability of surrounding rock under full section excavation.The focus is on analyzing the influence of weak plane inclination angle and tectonic stress on the deformation and displacement of surrounding rock,and the deformation mechanism of surrounding rock is discussed.The research results indicate that after excavation of the tunnel,the horizontal displacement converges towards the center of the tunnel.The vertical displacement of the tunnel is greatly affected by the inclination angle of the weak plane.As the inclination angle of the weak plane increases,the maximum displacement gradually shifts from the arch to the left side of the tunnel.The deformation of the two sides of the tunnel exhibits obvious non-uniform deformation characteristics with the change of weak plane inclination angle.The displacement changes of the monitoring points set up on both sides of the tunnel exhibit opposite trends within a specific range of weak plane dip angles.Based on the research on the deformation characteristics of the surrounding rock of the tunnel,technical support is provided for the design and engineering application of tunnel support.

关 键 词：结构面 不均匀变形 巷道围岩变形 构造应力 

分 类 号：TD322[矿业工程—矿井建设]