注浆支护深度对非等压圆形巷道围岩塑性区半径的影响  

Influence of Grouting Support Depth on Plastic Zone Radius of Surrounding Rock of Non-isobaric Circular Roadway

作　　者：王攀 王卫军 袁超[1] 范磊 WANG Pan;WANG Weijun;YUAN Chao;FAN Lei(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern 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]湖南科技大学南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2023年第2期29-36,共8页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(52074115;51874130);湖南省自然科学基金资助项目(2021JJ40211)。

摘　　要：随着煤矿开采水平的不断提高,我国许多矿区陆续进入深部开采阶段,深部围岩大多处于高应力状态,并且强度低、易破碎,因此注浆支护已成为一种常用、有效的支护手段,研究注浆支护对于巷道周边围岩的稳定性有着重要意义.塑性区发育始终伴随巷道围岩的破坏,为研究注浆支护深度对塑性区半径的影响,基于Mohr-Coulomb强度准则,推导出巷道围岩塑性区半径关于注浆支护深度的函数,并对巷道进行注浆支护数值模拟和塑性区半径理论计算.结果表明:数值模拟得到的塑性区半径与理论计算得到的塑性区半径极为接近;同时,在注浆范围与塑性区范围理论值趋于相近时,塑性区范围无论是模拟值还是理论值,都已趋于稳定,此时的注浆支护范围也是最佳注浆支护范围.With the deepening of coal mining level,many mining areas in China have entered the stage of deep mining,deep surrounding rock is mostly in a high stress state,and low strength,easy to break,so slurry support has become a very common and effective means of support.Research on grouting support is of great significance for the stability of surrounding rock around roadway.The development of plastic zone is always accompanied by the destruction of roadway surrounding rock.In order to research on the effect of injection slurry support depth on the radius of plastic area,based on Mohr-Coulomb strength criterion,this paper deduces the function of the radius of the roadway surrounding rock plastic area on the depth of injection slurry support,and makes numerical simulation of injection slurry support and the theoretical calculation of plastic area radius in the roadway.Results show that the radius of the plastic region obtained by numerical simulation is very close to the radius of the plastic area calculated theoretically.At the same time,when the injection range and the theoretical value of the plastic area range tend to be close,the plastic area range,whether analog or theoretical,has stabilized,and the injection slurry support range is also the best injection area.

关 键 词：注浆深度 塑性区半径 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]