露天矿边坡危险度的直觉模糊熵权法评价模型

Evaluation model of open-pit slope risk based on intuitionistic fuzzy entropy weight method

为了提高露天矿边坡安全预警的可靠性,针对决策者权重及属性权重均未知,属性值为直觉模糊数的露天矿边坡危险度的群评价问题,提出直觉模糊熵权法确定权重,并借助直觉模糊加权平均算子对各级评价矩阵进行集结,得到每个观测点对应的直觉模糊数,然后将其带入含有双参数的得分函数进行决策分析。最后以神华宝日希勒能源有限公司露天矿的实测数据报告为工程实例,采用模型方法对其边坡区域的稳定性进行了危险度评价。研究表明,熵权法与直觉模糊理论的结合,既降低了危险度评价中人为因素的干扰,又建立了影响因子与评价结果之间的有效联系。模型可以用于指导露天矿边坡的稳定性分析和开采设计。

In order to improve the reliability of open-pit slope safety early warning,we put forward the group evaluation on risk degree of slope in open pit with the unknown weight and attribute weight of the decision-maker and the attribute value as the intuitionistic fuzzy number,and propose intuitionistic fuzzy entropy weight method to determine weights,aggregate the evaluation matrices at all levels with the help of intuitionistic fuzzy weighted averaging operator,obtain the intuitionistic fuzzy number corresponding to each observation point,and make decision analysis by taking it into the scoring function containing two parameters. Finally,based on the engineering background of Baorixile Open-pit Mine,we evaluated risk degree of the slope area by the model method. The study shows that the combination of entropy weight method and intuitionistic fuzzy theory not only reduces the interference of human factors in the risk assessment,but also establishes an effective connection between the impact factor and the evaluation result. The model can be used to guide the stability analysis and mining design of the slope in the open pit.