【摘要】 为了准确评价采空区围岩的稳定性,降低围岩失稳事故发生的风险,考虑评价指标不确定性和突变性对评级结果的影响,提出了基于改进组合权重耦合SPA的采空区围岩稳定性评判模型。首先选取影响围岩稳定性的11个指标构建采空区围岩稳定性评价指标体系,通过引入欧式距离函数,确保主、客观权重与折衷系数间的差异程度,进而获得各指标的组合权重;然后利用SPA理论得到采空区围岩稳定性评价指标的集对联系度表达式;最后根据最大隶属度原则确定围岩稳定性等级。以山西某矿的3个采空区为例,对比分析预测结果与采空区围岩稳定性实测结果。结果表明:改进组合权耦合SPA的采空区围岩稳定性评价模型的评价结果与实例应用结果一致,该模型较传统SPA法准确性更高,计算结果可靠,能够为矿山施工决策问题提供理论依据。更多还原

【Abstract】 In order to accurately evaluate the stability of goaf surrounding rock and reduce the risk of surrounding rock instability accidents,considering the influence of evaluation index uncertainty and mutation on the rating results,a goaf surrounding rock stability evaluation model based on improved combined weight coupled spa is proposed. Firstly,11 indexes affecting the stability of surrounding rock are selected to construct the evaluation index system of surrounding rock stability in goaf.By introducing the Euclid distance function,the difference between the subjective and objective weights and the compromise coefficient is ensured,and then the combined weight of each index is obtained;Then the expression of set pair connection degree of surrounding rock stability evaluation index in goaf is obtained by using SPA theory;Finally,the stability grade of surrounding rock is determined according to the principle of maximum membership. Taking three goafs of a mine in Shanxi as an example,the predicted results are compared with the measured results of surrounding rock stability in goaf. The results show that the evaluation results of the improved combined weight coupled spa goaf surrounding rock stability evaluation model are consistent with the example application results. The model has higher accuracy and reliable calculation results than the Traditional spa method,and can provide a theoretical basis for mine construction decision-making.更多还原