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
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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。
Abstract: 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” .
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Keywords:
- open-pit coal mine /
- red clay slope /
- goaf /
- supporting arch /
- instability mechanism /
- slope stability
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