采动环境下深部软岩巷道围岩破裂演化及锚注支护机理研究

项目名称： 采动环境下深部软岩巷道围岩破裂演化及锚注支护机理研究

项目编号： No.51274191

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 王连国

作者单位： 中国矿业大学

项目金额： 82万元

中文摘要： 随着浅部煤炭资源的日益枯竭，我国煤矿正逐步转向深部开采。深部矿井所处的地质环境极其复杂，尤其是在高地应力以及强烈开采扰动影响下，软岩巷道冒顶事故、底臌现象普遍存在，巷道维护十分困难且维护成本极其昂贵，严重影响企业安全生产和经济效益。如何有效地控制深部软岩巷道围岩稳定已是当前我国深部煤炭开采亟待解决的重大课题。本课题基于大量的深部软岩物理力学性质细观实验和宏观实验数据，综合运用细观力学、损伤力学和断裂力学理论，研究采动环境下深部软岩巷道围岩裂隙扩展演化机制；并将现场精细探测与数值模拟手段相结合，研究深部开采过程中软岩巷道周围应力场、变形场以及裂隙场的分布规律。在此基础上，采用物理相似模拟实验、数值模拟以及研制智能专家系统等方法，对深部软岩巷道锚注支护技术中亟待解决的关键理论难题，包括采动裂隙浆液扩散、锚注支护参数设计、锚注支护效果评价等进行深入研究，为我国煤矿深部软岩巷道围岩控制提供理论依据

中文关键词： 深部软岩巷道；裂隙演化；锚注；浆液渗透；专家系统

英文摘要： With the rapid decrement in shallow coal resources, deep mining in many coal-mines are under way. Extremely complicated geo-environments in deep coal-mines, especially the high stress and strong influence of mining, trigger the common instability of soft rock roadways, such as roof fall accidents, floor heave and among others. The difficulties in roadway maintenance and its expensive maintenance costs serious affect the safety and economical benefits of deep coal-mines. Therefore, one of the topical subjects in deep coal mining is how to effectively control the stability of the deep soft rock roadways. Based on numerous microscopic experiments and macroscopic experiments of physical and mechanical properties of deep soft rock, micromechanics, damage mechanics and fracture mechanics are applied to reveal the mechanisms of crack growth and evolution in rock of deep roadway. Also, the fine field detection together with numerical simulation is employed to investigate the distribution of stress, displacement and cracks around the roadway under the influence of mining. On this basis, physical simulations, numerical simulations and intelligent expert system are used to solve critical unsolved theoretical problems in bolt-grouting techniques, including slurry diffusion in cracks induced by mining, parameter design of bo

英文关键词： deep soft rock roadway；fracture evolution；bolt-grouting；slurry seepage；expert system