回采巷道围岩稳定性模糊等价聚类分析

Study on the Fuzzy Equivalence Cluster of Stability of Surrounding Rock of Gateways in Coalmines

回采巷道是煤矿回采系统的咽喉,回采巷道分类影响到巷道支护设计、施工与支护质量。在对回采巷道稳定性分类的主要影响因素及指标选取原则分析的基础上,提出了对原始数据预处理的方法与计算公式。根据模糊等价关系,以15个矿43条回采巷道为样本,给出了不同置信度下的分类结果。最后,以F统计量最大原则对最优分类类别进行了计算。结果表明,43条回采巷道最优分类为两类,给出的样本在很大程度上具有相似性。

Gateways are the throat of coalmine's production system. The classification of gateway directly affects the support design, construction and support quality. The method of the initial data pretreatment and corresponding formula are put forward. According to fuzzy equivalence relationship, taking 43 gateways in 15 mines as samples, classification result is given at the different confidence levels. The optimal classification categories are calculated according to the principle of maximum F statistic value and the optimal category number is 2. The given samples are to a great extent.