Research on surrounding rock stability classification of coal drift

In order to classify the surrounding rock stability of coal roadway in Huozhou Ming Area,the atthors applied fuzzy clustering analysis method based on fuzzy equivalence relation to divide the roadway samples into five types. Eight indicators suchas coal drift roof strength, floor strength,were chosen as classification evaluation in dicators. The new analytic hierarchy process of five scales was put forward to distribute the weight of eight classification indexes. Based on the classification results,this st udy put forward reasonable supporting countermeasures for each type of roadway in Huozhou Mining Area. A classification program was compiled,using C language,for the classification calculation conveniently,rapidly and accurately. The results showed that the fuzzy clustering method and AHP was applied in coal roadway surrounding stabilit y classification very well,and the classification result conform to the actual situation. The reasonable supporting countermeasures for each type of roadway,based on the cl assification results,provide effective guidance and reference for site construction.