攀枝花露天矿排土场边坡稳定性的三维数值模拟研究

RESEARCH ON THREE-DIMENSION SIMULATION OF OPENPIT MINE TAILING DAM SLOPE STABILITY IN PANZHIHUA

矿山排土场边坡的稳定性评价及安全管理对矿山环境的保护和地质灾害的防治具有重要意义。针对攀枝花露天矿的排土场 ,在建立其边坡地质模型的基础上 ,利用 FLAC-3 D软件 ,建立了排土场边坡的三维模型 ,对边坡的稳定性进行三维数值模拟研究 ,获得了排土场边坡变形破坏的基本特点及稳定性的基本状况。模拟的结果和现场调查的结果基本一致 ,从而为该排土场边坡的进一步治理提供了依据。针对 FLAC-3 D不能直接建立几何模型的特点 ,开发了一个数据前处理程序 ,可以自动生成与 FLAC-3 D相匹配的模型数据文件。

The slope of a tailing dam is a manual slope which has structural characters and formed during exploiting a mine. The stability appreciation and security management of this type of slope have important meanings to protect mine environments and prevent geological hazards. By the FLAC 3D software, the authors have built the three dimension tailing dam model and simulated the slope stability. The simulat results are consistent with that of the field exploration. Because FLAC 3D is a professional software, it is difficult to establish a model directly. What is more, the model data must fit for the software format. So the authors have generalized a method of data fore treatment program. Through tailing dam rock stratum distribution, the program treats the original data. On the basis of a primary unit mode which is supplied by FLAC 3D, the program sets up FLAC tiny unit model according to the net data mode, and then generates the model data file phase matched with the FLAC 3D through identifying the mode.