煤矿采空区不稳定斜坡变形机理研究

Deformation mechanism study of unstable slope in coal mined goaf area

在现场地质调查的基础上,结合物理模拟试验,对贵州省大方县云龙山变形体特征及其孕育演化过程进行了深入研究。云龙山所在区域石灰岩分布广泛,地形切割剧烈,谷深坡陡,坡脚六个煤硐的开采导致整个上覆坡体变形开裂并发生浅表层崩滑破坏,属于典型的地下采空区诱发上覆坡体失稳案例,其变形破坏过程可以概括为:煤层开采—采空区坍陷—坡体沉陷开裂—坡表失稳。

Base on the field geological survey and physical simulation test results,a detailed study on deformation characteristics and developing process is performed of an unstable slopes located in the coal mined area in Yunlongshan,Dafang County,Guizhou Province. The study area is constituted by limestone with intense cut terrains,deep valleys and steep slopes. The six coal mining caverns which are at the bottom lead to the slope cracks and collapses on the surface,which is a typical failure case induced by mining goaf. The failure process could be summarized as coal mining- goaf collapse- slope surface subsidence /cracking- slope failure.