FLAC3D数值模拟的边坡稳定性

Slope stability based on FLAC3D numerical simulation

为确保露天矿安全生产,避免因非工作帮滑坡所造成的巨大经济损失,对非工作帮边坡稳定性进行分析和评价.采用FLAC3D建立边坡数值模型,基于强度折减理论对边坡的稳定性进行数值模拟.研究其应力和位移分布特征,变形破坏和塑性区分布特征,揭示滑坡机理,验证极限平衡法的准确性.以第4勘探线中的H12钻孔作为基础的模型H12,得出其安全系数为1.263 01,大于采场边坡安全储备系数1.10,边坡稳定性良好.为提出合理边坡治理措施提供依据.

Huajian open-pit coal mine belongs to the LTD of Huajian open-pit coal mine in Inner Mongolia.It is a modernized large-scale open-pit coal mine.It will conduct the mining of steep slope.To ensure the production safety of open-pit mine and avoid the non-working landslide causing huge economic losses,it needs to analyze and evaluate the stability of non-working slope.This paper adopts FLAC3D to establish the numerical simulation model of slope based on the strength reduction theory to analyze the stability of the slope,studies the characteristics of stress and displacement distribution,deformation damage and the characteristics of plastic zone distribution,and reveals the landslide mechanism to verify the accuracy of general limit equilibrium method.Model H12 based on H12 drilling which on the exploration line 4,gets its safety coefficient is 1.26301,which is greater than the rated value of 1.10,so its stability is good.It provides basis for reasonable measures of slope.