摘要
针对动压巷道变形失稳问题,以陕西某矿为工程背景,通过理论分析、数值模拟、实验室实验以及现场试验的方法对综放工作面动压巷道变形破坏特征进行研究并提出相应的防控策略。结果表明:工作面煤体受采动支承应力,采空区侧向应力以及巷道围岩应力的叠加影响,工作面超前采动应力的影响范围约为80 m,应力峰值位于工作面前方14 m位置,巷道煤体动力稳定性受顶底板岩层刚度影响,巷道围岩弹性能分布煤柱侧相对较高,随距离工作面距离的增加而减小,临空侧始终高于采动侧。最后根据影响动压巷道稳定性关键因素提出了应力转移、顶板处理以及煤体承载能力提升3种防控方向及相应技术。
Research on deformation and failure characteristics of dynamic pressure roadway in fully mechanized caving face and its prevention and control strategies, aiming at the deformation and instability problem of dynamic pressure roadway in fully mechanized caving face, taking a mine in Shaanxi province as the engineering background, studies the deformation and failure characteristics of dynamic pressure roadway in fully mechanized caving face and proposes the corresponding prevention and control strategies through the methods of theoretical analysis, numerical simulation, laboratory experiment and field test. The results showed that: the coal face is affected by the superposition of mining support stress, goaf lateral stress and roadway surrounding rock stress. The influence range of advance mining stress is about 80 m, and the peak stress is 14 m in front of the working face. The dynamic stability of roadway coal face is affected by the stiffness of roof and floor strata, and the distribution of elastic energy of roadway surrounding rock is relatively high at the side of coal pillar. It decreases with the increase of distance from the working face, and the open side is always higher than the mining side. According to the key factors affecting the stability of dynamic pressure roadway, three prevention and control directions, stress transfer, roof treatment and coal bearing capacity improvement,are proposed and given technical support.
作者
马程
MA Cheng(SHCCIG Yubei Coal Industry Co.,Ltd.,Yulin 719000,China)
出处
《煤炭技术》
CAS
北大核心
2023年第10期86-90,共5页
Coal Technology
关键词
综放工作面
动压巷道
围岩变形
fully mechanized caving faces
dynamic pressure roadway
surrounding rock deformation
