高渗压下砂砾层巷道变形稳定性分析  

Analysis of Deformation and Stability of the Roadway in Sandy-gravel Stratum Under High Seepage Pressure

作　　者：袁越[1,2] 付金磊 秦坚 陈国豪 刘诚 Yuan Yue;Fu Jinlei;Qin Jian;Chen Guohao;Liu Cheng(Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Xiangtan 411201, China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Xiangtan 411201, China;School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

机构地区：[1]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 [2]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 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2018年第4期22-30,共9页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51504091; 51774130);湖南省自然科学青年基金项目(2018JJ3166)

摘　　要：为了获得高渗压对西部矿区中生代砂砾层巷道变形、稳定性的影响规律,通过理论分析与数值模拟的方法探讨了渗流作用下围岩变形特征及巷道失稳致灾的原因,得到了渗压影响下的巷道围岩变形解及塑性区半径解.分析结果表明:外部渗透压力与砂砾层巷道围岩的变形近似呈线性关系,高压渗流对巷道顶板及帮部的变形、稳定性影响较显著;围岩产生较大变形后难以形成自平衡拱,同时,顶部水头压力较高,进一步增加了顶板下沉量,从而导致顶板松散岩体滑移、垮落,产生冒顶灾害.In order to obtain the influence law of high osmotic pressure on the deformation and stability of the Mesozoic sand-gravel stratum in the western mining area, through the theoretical analysis and numerical simulation method, the deformation results of the surrounding rock under the seepage and the cause of the instability of the roadway are discussed. The deformation of the surrounding rock and the radius solution of the plastic zone under the influence of seepage pressure are obtained. The external seepage pressure is approximately linear with the deformation of the shallow surrounding rock in the sandy-gravel stratum, and the high seepage pressure has significant effects on the deformation and stability of the roof and sidewalls. After the large deformation of the surrounding rock occurs, it is difficult to form a balanced arch. At the same time, the high water head pressure at the top and the large flow further increase the roof subsidence, which leads to the slip and collapse of loose rock mass in the roof, or the disaster of roof falling.

关 键 词：西部矿区 砂砾层 渗流 高渗透压 巷道失稳 

分 类 号：TD353[矿业工程—矿井建设]