Abstract：Aiming at water inrush threat from the high confined water of Ordovician limestone in deep mine for coal resources exploitation,the nine factors are treated as matter-element model features based on extension theory,and the hierarchy analysis method is used to determine the weights of the influence factors,and four stages of matter-element model for inrush water risk assessment are established,and the classical domain and joint domain are determined. 3210 working face is evaluated based on the model. The results showed that,matter element model can quantitatively reflect the degree of water inrush risk,water inrush risk level of 3210 working face is relatively safe,water inrush coefficient is 0. 024 5 ~ 0. 026 0 MPa / m which is far less than the water inrush coefficient critical value. The results of the two methods show that the coal seam floor can effectively block the Ordovician limestone water,and can realize the safe pressure mining.

Keyword：evaluation index system;hierarchy analysis method;extension matter-element model;risk assessment;