动压巷道锚固失效机理及支护结构优化研究  

Study on Anchoring Failure Mechanism and Support Structure Optimization of Dynamic Pressure Roadway

作　　者：张洪清 汪占领[2,3] 万峰 郭罡业 周佩军 石蒙[2,3] Zhang Hongqing;Wang Zhanling;Wan Feng;Guo Gangye;Zhou Peijun;Shi Meng(Jalainur Coal Co.,Ltd.,Manzhouli 021410,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;Coal Mining Branch,China Coal Reserarch Institute,Beijing 100013,China)

机构地区：[1]扎赉诺尔煤业有限责任公司,内蒙古满洲里021410 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]煤炭科学研究总院开采研究分院,北京100013

出　　处：《煤矿机械》2021年第7期129-134,共6页Coal Mine Machinery

基　　金：华能集团总部科技项目(HNMYKJ18-15)。

摘　　要：针对煤矿动压巷道因锚固失效而导致的冒顶和大变形问题,以扎赉诺尔矿区为工程背景,通过现场调研和理论分析得到了动压巷道锚固失效的原因,认为锚杆与其配套的构件不匹配是造成动压巷道锚固失效的主要原因,并通过数值模拟构建了锚杆托盘、组合支护构件模型,得到了不同构件的支护应力分布情况。根据模拟结果得到了最佳支护结构匹配,结合动压巷道锚固失效原因提出了改进的支护策略。工程实践结果表明:锚杆支护结构设计改进后,巷道围岩变形降低幅度非常显著。In view of the roof fall and large deformation of coal mine dynamic pressure roadway caused by anchoring failure, taking Jalainur mining area as the engineering background, the reasons of anchoring failure in dynamic pressure roadway were obtained through field investigation and theoretical analysis. It is considered that the main reason for anchor failure of dynamic pressure roadway is the mismatch between anchor bolt and its supporting components. Through numerical simulation, the model of bolt tray and combined support component was constructed, and the support stress distribution of different components was obtained. According to the simulation results, the best support structure matching was obtained, and the improved support strategy was put forward combining with the anchor failure reason of dynamic pressure roadway. The engineering practice results show that the deformation of surrounding rock of roadway decreases significantly after the support structure design is improved.

关 键 词：动压 锚固失效 支护 结构优化 

分 类 号：TD353[矿业工程—矿井建设]