地下开采引发的地表沉降的模糊综合评价

Fuzzy Comprehensive Evaluation on Surface Subsidence Caused by Underground Mining

地下开采引发的地表沉降会对周围环境造成一定的影响。为评价东同Ⅴ号矿体开采引发地表沉降的安全性,从自然地质因素和采矿技术因素2个方面建立了评价体系,运用Fuzzy AHP法确定各评价指标的权重,并对各评价指标影响程度灰量进行量化,借助中心点三角白化权函数求取矿山指标现实值的隶属度矩阵。最后,选用合适的算子进行二次模糊综合评价,得到地表沉降影响程度的最终评价结果。结果表明,东同Ⅴ号矿体开采引发的地表沉降影响等级为"较强烈",与工程实际情况一致。

Surface subsidence caused by underground mining would have an impact on the surrounding environment.To evaluate the security of surface subsidence caused by underground mining in Dongtong No.5orebody,the evaluation system was established from natural geological factors and technical factors.The weights of each evaluation index were determined by Fuzzy AHP method,and the influence grayscales were quantified.With the center triangle whitening weight function,the membership matrix of the mining index value was obtained.Finally,the secondary fuzzy comprehensive evaluation was carried out with appropriate operator,and the final assessment results of surface subsidence were obtained.The results showed that the surface subsidence during mining Dongtong No.5orebody was relatively strong,which was consistent with the engineering practice.