基于分级分析法评价结构面对岩质 高边坡稳定性的影响

以云南省普洱市大平掌铜矿东部边坡为工程实例，研究结构面对岩质高边坡稳定性的影响.通过大型露天矿山边坡岩体工程稳定性分级分析方法，按照岩体结构面与矿山边坡规模的匹配性，依次对矿山边坡的总体边坡、组合台阶边坡、台阶边坡进行分层次的岩体稳定性分析并找出控制边坡稳定的关键性结构面及其组合.经过现场与实验分析对比，得到结构面对台阶边坡和整体东部边坡的影响很大，对组合台阶坡影响甚小.同时台阶边坡相对于整体东部边坡而言规模较小，故台阶边坡的结构面对整体东部边坡影响较小.最后，运用Midas-GTS建立考虑结构面及不考虑结构面的东部边坡三维有限元模型，进行稳定性计算分析及对比. 

Evaluation of the influence of structure on the stability of high rock slopes based on graded analysis

Taking the slope of Eastern Dapingzhang Copper Mine in Pu'er City in Yunnan Province as an example, this paper is aimed to study the influence of the structure on the stability of high rock slopes. Through the graded analysis of rock mass engineering stability of large open pit mines, according to the matching of rock mass structure surface and mine slope scale, rock stability analysis was conducted to the overall slope, combined step slope and step edge of the eastern slope of Dapingzhang copper mine successively. We successfully found the key structural planes and combinations that control the slope stability. The comparison with the experimental and on-site analysis shows that the structure had a great influence on the step slope and the overall eastern slope, but had little influence on the combined step slope. At the same time, the step slope was relatively small compared to the overall eastern slope, so its structure had less influence on the overall eastern slope. Finally, Midas-GTS was used to establish a three-dimensional finite element model of the eastern slope with the structural plane considered and not, theirk0 stability calculation analysis and comparison were carried out.