基于FLAC^(3D)对开采引起地表沉降规律研究

FLAC^(3D)-based Research on the Law of Surface Subsidence Caused by Mining

针对某金矿开采引起地表沉降问题,基于FLAC^(3D)软件采用理论和数值模拟相结合方法,对地表垂直位移、水平位移、斜率与曲率三个维度进行了沉降规律的分析。结果表明,在矿产开采完后,引起竖直方向最大下沉量为166.5 mm,水平方向最大下沉量达175 mm,地表最大倾斜0.6 mm/m,最大曲率0.0052 mm/m^(2),最大水平变形0.404 mm/m。最大沉降量和变形量均在安全系数内,可以保证安全作业和采区稳定。

To address the issue of surface subsidence caused by mining activities at a gold mine,a combination of theory and numerical simulation is employed to analyze the surface subsidence law in three dimensions of vertical displacement,horizontal displacement,inclination and curvature,based on the FLAC^(3D) software.The results show that at the end of the mine production,the maximum vertical subsidence is 166.5 mm,the maximum horizontal subsidence is 175 mm,the maximum surface inclination is 0.6 mm/m,the maximum curvature is 0.0052 mm/m^(2),and the maximum horizontal deformation is 0.404 mm/m.The maximum subsidence and deformation are both within the safety factor,which can ensure safe operation and stability of the mining area.