主应力方向变化对巷道围岩塑性区形态特征的影响  

Study on the Influence of the Change of Principal Stress Direction on the Morphological Characteristics of Plastic Zone in Surrounding Rock of Roadway

作　　者：黄聪 王卫军 袁超[1] 肖宇 Huang Cong;Wang Weijun;Yuan Chao;Xiao Yu(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 andRoof 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》2020年第1期7-11,共5页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51804109,51434006,51874130);湖南省教育厅科研资助项目(18C0333);湖南科技大学博士启动基金资助项目(E51851)。

摘　　要：为了研究深部巷道围岩塑性区在不同方向垂直主应力作用下的扩展规律,结合江西曲江煤矿实际条件,采用现场调查、数值分析等方法,对不同方向主应力影响下深部巷道塑性区形成及扩展规律进行分析,研究结果表明:(1)垂直主应力方向的改变会影响巷道围岩蝶形塑性区蝶叶的扩展方向,蝶形塑性区总会朝向垂直主应力偏转方向转动相近的角度;(2)巷道围岩的变形量与巷道临空面纵向塑性区深度成正相关,巷道临空面塑性区深度越深,巷道断面向内部收缩越严重.In order to study the expansion and change law of plastic zone of deep roadway surrounding rock under the action of vertical principal stress in different directions,based on the actual conditions of Qujiang Coal Mine in Jiangxi Province,the formation and expansion law of plastic zone of deep roadway under the influence of principal stress in different directions are analyzed by field investigation and numerical analysis methods.Results show that:(1)the change of the direction of the principal principal stress affects the expansion direction of the butterfly-shaped plastic zone in the surrounding rock of the roadway,and the butterfly-shaped plastic zone always rotates close to the vertical principal stress deflection direction.(2)the deformation of the surrounding rock of the roadway is positively correlated with the depth of the longitudinal plastic zone of the roadway.The deeper the plastic zone of the roadway surface is,the more serious the roadway section shrinks toward the interior will be.

关 键 词：塑性区 主应力方向 巷道变形 围岩稳定性 

分 类 号：TD322[矿业工程—矿井建设]