淮河采矿塌陷区河堤渗透稳定性数值分析

Numerical analyses of dyke seepage-stability in mining subsided area across Huaihe River

根据场地地层基本物理特性 ,采用非均质各向异性稳定渗流模型对李嘴孜矿区淮河大堤正常堤段和采矿塌陷堤段的渗流状况进行流场条件概化 ,采用有限元数值计算方法对洪水期高水位条件下的河堤渗流进行了模拟求解 ,给出河堤各部位渗透速度和水头梯度的分布 ;在此基础上 ,进行了河堤危险部位渗透稳定性分析计算 ,作出两种堤段均不会发生渗透破坏的基本结论。

Based on the analysis of the physical features of site beds, an inhomogeneous and anisotropic steady seepage model is applied to analyze the dyke seepage of Huaihe River during flood periods in both normal segment and the one within subsided section due to underground mining.The finite element modeling method is adopted. With the analytic calculation, the seepage stability of each dyke segment is assessed,and it is considered that the two segments will remain stable.