不同煤层倾角锚杆支护巷道围岩受力特征物理模拟研究  

Physical Simulation of Surrounding Rock Stress of Roadway Supported by Anchored Bolt with Different Coal-seam Inclined Angle

作　　者：张向阳[1,2] 杨科[1,2] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]安徽理工大学煤与瓦斯共采实验室,安徽淮南232001

出　　处：《煤矿开采》2014年第2期58-62,共5页Coal Mining Technology

基　　金：国家重点基础研究发展计划(973)项目(2010CB226806);安徽省高等学校优秀青年人才基金资助项目(2010SQRL044ZD);安徽省高等学校省级自然科学研究资助项目(KJ2013A098)

摘　　要：为了研究煤层倾角变化对锚杆支护回采巷道围岩力学特征的影响,结合淮南矿区大倾角煤层开采地质和技术条件,应用自制相似材料模拟旋转试验架,建立了煤层倾角为0°,30°和45°的锚杆支护回采巷道的相似材料模拟模型,系统分析了不同煤层倾角锚杆支护回采巷道围岩应力、变形和破坏特征。随煤层倾角增大,巷道围岩应力分布和变形的非对称性特征更加明显;倾角越大,巷道围岩的整体稳定性越差。研究得出顶板、高帮和底板是大倾角煤层实体煤回采巷道围岩稳定性控制的关键部位,揭示了煤层倾角变化对锚杆支护巷道围岩力学特征影响的作用机理。工程应用表明,大倾角煤层回采巷道围岩稳定性控制的关键是根据巷道围岩非对称结构特点和围岩力学特征的非对称性,采用非对称锚网索组合支护,并不断改进支护材料、优化支护参数、加强施工工艺和质量管理。In order to research the influence of coal-seam inclined angle on mechanical characteristic of surrounding rock of mining roadway supported by anchored bolt, applying self-made rotational test frame of analogue simulation, mining roadways supported by an- chored-bolt in 0°, 30° and 45°coal-seam were simulated. Stress, deformation and failure characteristic of surrounding rock were ana- lyzed. Results showed that with inclined angle increasing, asymmetry of stress distribution and deformation was more obvious, and whole stability of surrounding rock was worse. It was obtained that roof, high wall and floor were key position of controlling surrounding rock stability of mining roadway in coal-seam with large inclined angle and the action mechanism of coal-seam inclined-angle variation on mechanical characteristic of surrounding rock. Practice showed that the key of controlling surrounding rock stability of mining road- way was applying unsymmetrical combing anchored-boh and cable supporting, constantly improving supporting material, optimizing supporting parameters and strengthening technique and quality management

关 键 词：大倾角煤层 回采巷道 非对称锚杆支护 相似材料模拟 围岩稳定性 

分 类 号：TD322.1[矿业工程—矿井建设]