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为了更精确合理地评价采空区危险性,针对采空区危险性评价中涉及的各因素复杂性和不相容性特点,运用熵权法与物元分析建立采空区危险性评价模型。从地质条件和工程实际出发,考虑采空区稳定性的14项影响因素,基于多指标优化融合的思想,通过物元变换建立采空区危险性评价的物元体系,计算评价指标对评价等级的关联度,引入熵权法确定评价指标的权重,然后根据采空区危险性对评价等级的关联度确定采空区危险性等级。将该方法用于评价湖南冷水江锡矿山8个采空区的危险性,得出其危险性等级分别为Ⅲ级、Ⅲ级、Ⅲ级、Ⅱ级、Ⅱ级、Ⅱ级、Ⅳ级和Ⅳ级,该评价结果与实际情况相符。
In order to evaluate the danger of goaf more accurately and reasonably, according to the complexity and incompatibility of each factor involved in the hazard assessment of goaf, the risk assessment model of goaf is established by entropy method and matter element analysis. Based on the geological conditions and engineering practice, 14 influencing factors of the stability of the goaf are considered. Based on the idea of multi-index optimization and fusion, the matter-element system of risk assessment of goaf is established by matter-element transformation. The author introduces the entropy weight method to determine the weight of the evaluation index, and then determines the hazard level of the goaf according to the relevance of the risk of goaf to the evaluation level. The method was applied to evaluate the danger of 8 goafs in Lengshuijiangxi Mine in Hunan Province, and the risk grades of them were Grade Ⅲ, Ⅲ, Ⅲ, Ⅱ, Ⅱ, Ⅳ, Ⅳ Level, the evaluation results in line with the actual situation.