基于FLAC^(3D)分区赋值的煤巷变形破坏特征及控制研究  

Study on Coal Roadway Deformation and Failure Characteristics and Control Strategies Based on “Differ Parameter” of FLAC^(3D)

作　　者：贾彪[1] 张成林[2] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]中国矿业大学力学与建筑工程学院,江苏徐州221008

出　　处：《煤炭工程》2014年第8期84-87,共4页Coal Engineering

基　　金：中国博士后科学基金面上项目(20110491475);国家大学生创新项目(201310290014)

摘　　要：针对大断面特厚煤层巷道支护困难及数值模拟中围岩参数的合理选取问题,采用室内试验、现场测试和理论计算相结合的研究方法,分析巷道不同部位围岩的真实强度,并基于"分区赋值"思想研究大断面特厚煤层巷道的变形破坏特征,选取与之相符的松动圈支护理论进行控制设计,结果表明:理论计算、现场实测及数值模拟得出的松动圈厚度分别为1.51m、1.57m和1.6m,三者基本吻合;无支护时围岩变形均匀地向巷道空间发展,顶板易发生整体性垮落,围岩位移主要由松动圈范围内围岩碎胀变形引起;数值模拟表明支护方案形成组合拱的厚度与预期结果相符;工程应用效果良好,经济效益显著,说明松动圈支护理论能很好的解决大断面特厚煤层巷道的支护问题。Aiming at the difficulty of large - section coal roadway support in extremely thick coal seam and the reasonable selection of surrounding rock parameters in numerical simulation, the real strength of roadway surrounding rock in different parts was studied, and the distortion and failure character of roadway was analyzed based on the thought of ＂ differ parameter＂, and the design method of support parameters was selected based on loose circle theory consistent with the character. The calculation, field measurement and numerical simulation results of loose circle thickness were respectively 1.51 m, 1.57m and 1.6m, which were basically anastomotic; the deformation of surrounding rock developed uniformly to the roadway space without support, which could cause holistic roof caving, surrounding rock displacement was caused by the broken expansion deformation within rock loose circle; the numerical simulation showed that, the combination arch was formed and matched with the expected results and good engineering application results was achieved, the loose circle support theory could effectively solve the problem of large - section roadway support in extremely thick coal seam.

关 键 词：特厚煤层 大断面巷道 分区赋值 松动圈支护理论 

分 类 号：TD355[矿业工程—矿井建设]