The Risk Assessment of Roof Water Inrush based on Cluster Analysis and Fuzzy Comprehensive Evaluation

In view of the risk that roof water inrush from 3^-1 coal seam in the west panel of Tarangaole Coal Mine, the key factors such as aquifer thickness, collecting rate of drill core, thickness ratio of brittle-plasticity, permeability coefficient and units-inflow were analyzed by cluster analysis to water inrush partition, by using fuzzy comprehensive evaluation method, it can be divided into four grades of “secure”, “relatively secure”, “relatively dangerous” and “dangerous”. The results show that it is divided into 6 zones, the F zone is “dangerous” and the rest zones are “secure”, which is in accordance with the actual hydrogeology condition. The fuzzy comprehensive evaluation based on cluster analysis can be used to assess the risk of roof water inrush.