摘要
我国大型露天煤矿主要分布在西北部,且主要集中于内蒙古地区,该区域岩性以软岩为主。以软岩为主的采场、排土场复合边坡形成后,采场软岩边坡将在外排土场的载荷作用下发生变形,同时外排土场也发生沉降作用,两个应力场复合叠加后,致使复合边坡整体应力场发生变化,不利于边坡稳定,易形成复合滑坡灾害。本次分析是基于强度折减理论,应用FLAC3D对采场排土场复合边坡变形进行数值模拟,展现出采场排土场复合边坡的变形机理。依据数值模拟结果,获得采场排土场复合边坡的最危险滑面和多处潜在滑动面,为采场排土场复合边坡失稳的预测及防治工作提供科学依据。
The large surface mining mainly distributed in northwestern parts in China, and most of them summed up Inner Mongolia region, The lithology is mainly composed of soft reck , Based on the soft rock stope, dump composite slope formed, and soft rock slope would be deformation under the external dump external load, while the outer dump also sedimentation, after superposition of two stress field made the complex slope stress field changed, which was not conducive to stability, and formed complex landslide disasters. The analysis is based on the strength reduction theory, applied the FLAC3D for dump slope deformation numerical simulation, and revealed dump slope deformation mechanism. According to the numerical simulation results, acquired the most dangerous dump slope slip surface and much more potentially sliding face. which provided scientific basis for dump slope instability of prediction and prevention.
出处
《露天采矿技术》
CAS
2013年第8期31-32,35,共3页
Opencast Mining Technology
关键词
复合边坡
数值模拟
强度折减
滑坡机理
compound slope
numerical simulation
strength reduction
landslide mechanism
