基于组合赋权和未确知测度理论的采空区安全性评价

Evaluation of goaf safety based on combination weighting and unascertained theory

某金矿长期采用浅孔留矿采矿法进行开采,遗留了大量的采空区。针对目前采空区的稳定状态,选取了单轴抗压强度、完整性系数、采空区暴露面积、跨高比等12项因素作为预测指标体系,构建未确知测度模型,提出基于AHP-信息熵组合赋权的权重计算方法,采用专家打分法及线性公式法作为定性指标、定量指标的测度函数,最后根据置信度识别准则得出评价结果。研究表明,预测结果与现场采空区实际表现情况相符,验证了此方法的可行性,丰富了采空区的安全性评价方法。

A gold mine, operating with the short-hole shrinkage method for a long time, leaves a large number of goafs.According to the steady state of the current goaf, 12 factors including uniaxial compressive strength, integrity coefficient, the exposed area of goafs, and span/height ratio were selected as the predictive index system, and the unascertained measurement model was constructed.A weight calculation method based on AHP-information entropy combination weighting is proposed, and the expert scoring method and linear formula method are used as the measurement function of the qualitative index and quantitative index, finally, the evaluation results are obtained according to the confidence recognition criterion.The research shows that the prediction results are consistent with the actual performance of the onsite goafs, verifying the feasibility of this method and diversifying the safety assessment method of goafs.