模糊综合评判在西南矿区沿空留巷适应性评价中的应用

沿空留巷技术在实际应用中表现出很大的优越性,为了使该技术在中小型煤矿中得到推广,综合运用层次分析法、模糊综合评判法建立了沿空留巷适应性评价模型。根据专家现场经验和试验研究结果,确定了影响适应性等级的6个主要地质因素,分别为煤层倾角、煤层厚度、巷道埋深、直接顶厚度影响系数、直接顶岩性和顶板完整性。采用层次分析法,通过构造判断矩阵,确定各个因素的权重。以西南某煤矿回采巷道为例,确定其留巷适应性等级为Ⅴ级,与实际留巷条件基本一致,表明该模型是合理可行的,能够实现对沿空留巷适应性等级进行评价。

The application of fuzzy synthesis assessment method to adaptability of gob-side entry retaining in southwest

Gob-side entry retaining has shown great superiority in practical application. In order to promote the gob-side entry retaining technology in small-to-medium-scale coal mines, this paper has used analytic hierarchy process (AHP) and method of fuzzy synthesis assessment to evaluate the adapt-ability of gob-side entry retaining. According to experts’ experience and experimental results, six geo-logical factors have been set i.e., burial depth, dip angle of coal seam, thickness of coal seam, lithology of roof, influence coefficient of immediate roof thickness, and roof lithology. Through AHP, the judg-ment matrix is structured and the weight of each factor is determined. For example, the adaptability rank of gob-side entry retaining of a roadway of a coal mine in southwest region is determined to be gradeⅤ, consistent with the theory based on the experiments, which showed that the model can play a useful role in evaluating the adaptability of gob-side entry retaining.