基于块体化程度和云模型的露天矿边坡稳定性分级评价方法

摘要

Aiming at solving deficiencies in the existing stability grading method, which can′t delineate the integrity of rock mass and take both randomness and fuzziness of influence factors into account, a factor of blockness was introduced to evaluate the stability grade of rock slope in open-pit mine based on cloud model theory. The proposed method can denote the rock mass integrity using blockness in terms of three-dimensional space. The application of cloud model through the whole process of stability grading, combined with the analytic hierarchy process and finite difference numerical simulation, can bring the parameters′ randomness and fuzziness into a full consideration, resulting in the grading evaluation process less effected by subjective factors. At last, this method is verified to be feasible and effective by project practice.%针对当前边坡稳定性分级方法不能全面刻画岩体的完整性且无法同时考虑影响因子随机性和模糊性的问题,引入了块体化程度概念,并基于云模型理论,提出了一种适用于露天矿岩质边坡的稳定性分级评价方法.该方法用块体化程度从三维空间角度描述岩体的完整性;将云模型应用到稳定性分级评价的各个环节,并借助层次分析法和有限差分数值模拟手段,可以充分考虑影响因子的随机性和模糊性,减小分级评价过程中人为因素的影响.结合工程实例,验证了该方法的可行性和有效性.