基于FLAC3D-RAR的边坡稳定性分析和监测预警

Slope Stability Analysis,Monitoring and Early Warning Based on FLAC3D-RAR

以刚果(金)某露天矿边坡滑坡监测为例,结合FLAC3D数值模拟和真实孔径边坡雷达(RAR)两种手段,进行边坡稳定性分析和监测预警研究,实现了滑坡区域、滑坡时间的精准预报,为现场争取了2.5 h以上的临滑应急处置时间,有效避免了滑坡损失;在边坡风险区域位移发展变化特征、滑动破坏初始位置和滑动区域等方面,RAR边坡雷达监测数据均验证了FLAC3D数值模拟结果的准确性;同时表明FLAC3D可及时发现当前滑坡隐患区域之外的风险,为雷达监测做必要的补充,为充分处置滑坡隐患提供依据,提高了露天矿边坡管控水平。研究成果可为同类边坡的蠕动型滑动破坏预警提供参考。

Taking the slope landslide monitoring of an open-pit mine in the Democratic Republic of the Congo as an example,the slope stability analysis,monitoring and early warning research were carried out by combining FLAC3D numerical simulation and real aperture radar(RAR).The accurate prediction of landslide area and landslide time was realized,and the emergency treatment time of more than 2.5 h was obtained for the site,which can effectively avoid landslide loss.The accuracy of FLAC3D numerical simulation results was verified by RAR slope radar monitoring data in the aspects of displacement development and change characteristics of slope risk area,initial position of sliding failure and sliding area.At the same time,it indicates that FLAC3D can detect the risks outside the current landslide hazard area in time,make necessary supplements for radar monitoring,provide a basis for the full disposal of landslide hazards,and improve the management and control level of open-pit slope.The research results can provide a reference for the early warning of creep sliding failure of similar slopes.