基于参数反分析法的露天开采边坡稳定性分析

在边坡稳定性分析中,岩土物理力学参数是影响分析计算结果的一个重要因素。针对试验力学参数离散性大的问题,以德兴铜矿富家钨露天开采边坡工程为背景,对试验所获取的力学参数进行了反算,然后根据这些参数分别运用极限平衡法和有限元强度折减法对边坡在天然、饱水、爆破等工况下进行数值模拟计算,并综合考虑裂隙、岩性等因素对边坡作出稳定性评价。结果表明,边坡在局部地方可能发生失稳破坏,这也验证了参数反算结果的准确合理性且与工程实际相符。

Analysis of slope stability in open-pit mines based on back analysis of parameters

Physical and mechanical parameters of the rock have a great effect on the analysis of slope stability.In light of the large dispersion of experimental mechanical parameters,the paper carried out slope stability analysis with the slope engineering of open-pit Fujia tungsten mining in Dexing Copper Mine as the research subject,performed back calculation to mechanical parameters obtained by experiments,and then numerically simulated the slope in normal,wa-ter-saturated and blasting situations according to the parameters by limit equilibrium method and FEM shear strength reduction method respectively,with fracture,rock property and such factors considered as well.The results show that the slope could lose stability in local spots,which proves the eligibility of the back analysis of parameters and its con-sistence with engineering practice.