基于熵权法和模糊理论的采空区稳定性分析

Stability Analysis of Goaf Based on Entropy Weight Method and Fuzzy Theory

为了准确、客观地获得采空区的稳定分级,提出了基于熵权法的采空区稳定性模糊综合评判模型。从众多采空区复杂、不确定影响因素中,选取工程地质情况、采空区形态参数及其他因素3大类共15项因子,建立了模糊评判指标体系;通过构建因素集、评判集、权重级,建立了采空区稳定性模糊综合评判模型;引入熵权法确定权重,使得权重分配更加科学、客观,结合模糊平均加权法及置信度准则得出最终评判结果。以某地下金矿开采采空区为例,利用该模型进行稳定性分析,其评价结果与现场实际较相符,验证了此方法的可行性。

In order to obtain the stability classification of goaf accurately and objectively,a fuzzy comprehensive evaluation model of goaf stability based on entropy weight method was proposed.The fuzzy evaluation index system was established by selecting15 factors including engineering geological conditions,goaf morphological parameters and other factors from many complex and uncertain factors.Through building the factor set,judging set and weighting level,the fuzzy comprehensive evaluation model of goaf stability was established.By introducing the entropy weight method to determine the weight,the weight distribution was more scientific and objective.And combined with the fuzzy average weighting method and the confidence criterion,the final evaluation result was obtained.Taking the goaf of an underground gold mine as an example,the model was used for the stability analysis,and the evaluation results were in good agreement with the actual situation,which verified the feasibility of this method.