基于FLAC3D的开采地表沉陷数值模拟分析

Numerical Simulation Analysis of Mining Surface Subsidence Based on FLAC3D

为了探究FLAC3D数值分析软件在矿区地表沉陷中的应用,减少采动损害,采用FLAC3D软件对矿区工作面开采所导致的地表垂直沉陷位移进行了预测,发现随着11111工作面开挖距离的推进,地表垂直沉陷位移增大速率先慢后快,最终在地表形成沉陷盆地。预测结论与工作面地表现场控制点实际观测得到的数据进行对比分析,结果证明:通过软件所建立的FLAC3D三维模型模拟11111工作面开挖得到的垂直沉陷位移数据,与现场控制点实际观测得到的垂直沉陷位移数据相比,所反映的地表开采沉陷规律基本相同。

In order to explore the application of FLAC3D numerical analysis software in mining area surface subsidence andreduce mining damage, FLAC3D software was used to predict the surface vertical subsidence displacement caused by exploita-tion of working-face of mining area. It is found that the vertical subsidence displacement increases slowly and then quicklywith the advance of excavation distance in 11111 working-face, and finally forms subsidence basin on the surface. Comparedwith the actual observed data obtained from the surface control points of the working-face, the results show that the verticalsubsidence displacement data obtained by simulating 11111 working-face excavation with FLAC3D 3D model established bythe software are basically the same as the vertical subsidence displacement data observed by field control points.