【摘要】 露天矿边坡稳定性评价指标具有差异性、随机性、模糊性，为克服传统方法在露天矿边坡稳定性评价中指标权重静态、相关性处理不足及指标差异的缺陷，通过改进可拓云模型，运用差异系数替代传统CRITIC法标准差，修正评价指标独立性系数，引入关联度矩阵计算动态权重，建立了多层次多变量的露天矿边坡稳定性动态评价模型，并依据该评价模型对某露天矿3个高陡边坡区域进行稳定性评价。结果表明，该露天矿3个边坡区域的安全等级界限值分别为3.38、3.23、3.37,置信度因子均小于0.05,安全等级均为III级，均属于基本稳定边坡。3个边坡区域的评价结果与刚体极限平衡法、可拓学理论及未确知测度理论结果基本吻合，验证了该模型的适用性与可靠性。更多还原

【Abstract】 The evaluation indices for open-pit mine slope stability are characterized by variability, randomness and fuzziness. To overcome the defects of traditional methods in open-pit mine slope stability evaluation, such as static index weights, insufficient correlation processing and poor handling of index differences, a multi-level and multi-variable dynamic evaluation model was constructed for open-pit slope stability by improving extension cloud model, replacing the standard deviation in the traditional CRITIC method with the coefficient of variation, revising the independence coefficient of evaluation indices, and introducing correlation matrix into dynamic weight calculation. Then, three high and steep slopes in an open-pit mine were evaluated using this model. The results show that the safety grade limit values of those three slope areas are 3.38, 3.23 and 3.37 respectively, with confidence factors all less than 0.05, thus being graded as Class III and considered to be basically stable. It is found that the evaluation results are basically consistent with those obtained by using rigid body limit equilibrium method, extenics theory and unascertained measure theory, which verifies the applicability and reliability of the proposed model.更多还原