邓肯-张模型参数对尾矿坝变形计算的影响

Analysis on Tailings Dam Deformation Influenced by the Parameters of Duncan-Chang Model

通过土工试验得到承德某铁矿尾矿库尾矿砂邓肯-张(E-B)本构模型参数,采用Midas GTS有限元分析软件建立该尾矿库数值计算模型,分别对E-B模型中参数K、n、Kb、m进行了尾矿库变形特性影响的敏感性分析,分析结果表明K、n取值对尾矿库的变形计算结果精度影响较大,其中参数K对尾矿库垂直向位移影响最大,n对水平位移影响最大,因此以上2参数合理取值对于尾矿库变形计算极其重要。

The parameters of Duncan-Chang（E-B） constitutive model for the tailings dam of an Iron Mine in Chengde are obtained through soil tests.Midas GTS finite element analysis software is adopted to establish the numerical calculation model for tailings dam and to make the sensitivity analysis of E-B model parameters K,n,Kb,m on the tailings deformation respectively.The analysis results show that the K,n values greatly affect of the calculation accuracy of the tailings dam deformation.Among these values,K affects the vertical displacement of the tailings pond to be utmost,and n impacts on the horizontal displacement to be utmost.2 reasonable parameters values are extremely important for the tailings dam deformation.