基于熵权法和物元分析的采空区危险性评价研究

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。

Underground Goaf Risk Evaluation Based on Entropy Weight and Matter Element Analysis

In order to evaluate underground goaf risk more accurately and reasonably,an underground goaf risk evaluation model which considered the complexity and incompatibility of factors in the evaluation was built based on the entropy weight and matter element analysis.Considering the geologic condition and engineering status of underground goaf,14 factors influencing the stability of underground goaf and the thought of multiple indexes optimal fusion were taken into account.The matter element system of underground goaf risk evaluation was established based on the matter element transform.Then,the correlation degrees of the evaluation indexes with evaluation levels were calculated.The weights of evaluation indexes were determined by using entropy weight method.Thus,the levels of underground goafs were determined through the correlation degrees of underground goaf risk with evaluation levels.Furthermore,this model was applied to evaluate 8 underground goafs in Xi mine in Lengshuijiang,Hunan province.The evaluation results accord closely with the actual situation.