SUB-CLASSIFICATION OF STRACTURAL STABILITY OF SURROUNDING ROCKS OF GALLERY INFLUENCED BY OVERHEAD MINING AND ITS APPLICATION

The structural stability indexes reflecting the concrete stable conditions of surrounding rocks of gallery influenced by overhead mining are set up and their weights are determined from field measurement data. A sub classification pattern of the structural stability is obtained by using ISODATA fuzzy cluster analysis method. A practical scheme of stractural stability classification is also put forward. It can be used in stability prediction and support design of gallery influenced by overhead mining.