采空区影响下红黏土边坡失稳机制研究  

Study on instability mechanism of red clay slope under the influence of goaf

作　　者：李伟 任鹏[1,2,3] 李庆尧 郭夏飞 LI Wei;REN Peng;LI Qingyao;GUO Xiafei(Safety Branch of China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Resources High Efficient Mining and Clean Utilization,Beijing 100013,China;China Coal Research Institute,Beijing 100013,China;East Open-pit Mine,China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036006,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]煤炭科学研究总院,北京100013 [4]中煤平朔集团有限公司东露天矿,山西朔州036006

出　　处：《煤矿安全》2021年第4期237-240,共4页Safety in Coal Mines

基　　金：煤炭科学技术研究院有限公司基础研究基金资助项目(2018JC05)。

摘　　要：以平朔东露天矿北帮红黏土边坡为背景,研究采空区影响下红黏土边坡失稳机制。采用数值模拟分析和极限平衡理论相结合的方法,揭示了红黏土边坡在采空区影响下的拱效应、应力分布特征及失稳破坏发展规律。结果表明:红黏土边坡从稳定到破坏具有"台阶状"发展变化规律,其失稳破坏呈现"剪切-张裂-滑移-塌陷"机制。Based on the red clay slope in the northern part of Pingshuo East Open-pit Mine,the mechanism of red clay slope instability under the influence of goaf is studied.The arch effect,stress distribution and failure rule of red clay slope under the influence of goaf are revealed by numerical simulation analysis and limit equilibrium theory.The results show that the stability of red clay slope has a"step-like"development and change law from stability to failure,and the failure mechanism is"shear-tension crack-slip-collapse".

关 键 词：露天煤矿 红黏土边坡 采空区 支撑拱 失稳机制 边坡稳定性 

分 类 号：TD824.7[矿业工程—煤矿开采]