充填开采控制地表沉陷可靠性模糊综合评判

摘要

针对充填开采影响因素的复杂性和模糊性，为了更加合理客观的评价充填开采控制地表沉陷可靠性，采用AHP-模糊综合评判法建立评价模型。结合某煤矿膏体充填开采工程实践，选取4个方面的20个因素作为评价指标，利用AHP法确定各因素的权重，通过三角形隶属函数建立模糊评判矩阵，根据隶属度原则划分可靠性等级。结果表明，充填开采控制地表沉陷的可靠性综合评价等级为“良好”，充填体的强度、充填体欠接顶量和充填体的密实程度是影响充填可靠性的三个主要因素，可适当提高水泥掺量和充填料浆浓度及优化充填工艺来提高其可靠性，评判结果符合矿井实际情况。改善影响充填可靠性的三个主要因素亦可运用在钨矿山开采中，对钨矿山的安全生产有一定的借鉴作用。%In order to evaluate the reliability of backfill mining controlling surface subsidence reasonably and objectively, AHP-fuzzy comprehensive evaluation method is established according to complex and fuzzy influence factors of backfill mining. Based on the engineering practices of paste-back fill mining in Daizhuang coal mine, firstly, twenty factors are selected as evaluation indexes;secondly, AHP method is used to determine the weight of each factor; thirdly, fuzzy evaluation matrix is established through triangular membership functions; finally, reliability levels are divided according to the membership degree principle. The results show that the comprehensive evaluation grade of backfill mining controlling surface subsidence is “good”. Strength, owe top quantity and compaction rate of filling body are three main factors that influence the reliability, which can be improved by increasing the cement dosage and slurry concentration or optimizing the filling process. As can be seen, the evaluation result conforms to the mine's actual situation.