基于UAHP的采空区稳定性模糊综合评判

为准确评判矿山采空区稳定性等级,通过分析采空区稳定性各影响因素,确定地质、水文、采空区几何参数、环境等4个2级指标为影响其稳定性的主要因素。运用层次分析法(AHP)并结合模糊数学理论,建立采空区稳定性2级模糊综合评判模型。用区间数表示评判结果,分析处理评判矩阵得到专家评判的相似度和差异度,进而获取专家评判的可信度,建立基于不确定型层次分析法(UAHP)的采空区稳定性模糊评判方法。实例计算结果表明:在Ⅰ级评判指标中,地质构造、周围开采影响、地下水活动程度、跨度对采空区稳定性影响较大;用该采空区的稳定性等级为Ⅱ级。用该方法能得出各影响因素的综合权重,准确评判采空区稳定性等级。

Fuzzy Comprehensive Evaluation of Gob Area Stability Based on Uncertain Analytic Hierarchy Process

In order to evaluate the stability degree of mine gob area accurately,the geological factors,hydrological factors,geometric parameters of gob area and environmental factors were determined as the main factors that affect the stability of gob area through analyzing the factors that affect the stability of gob area.A secondary fuzzy comprehensive evaluation method was formulated by applying AHP and fuzzy mathematical theory.Interval number was used to describe the judgment.By dealing with the judgment matrix,the similarity degree and difference degree were gained and at last fuzzy evaluation method of gob area based on UAHP was established.Through analyzing a certain gob area,it was found that geological structure,mining effect around,groundwater activity level and span were main factors affecting gob area stability,the stability level of the gob area is class Ⅱ.This method could predict the stability degree precisely,providing the comprehensive weight of each evaluation index.