Abstract: Deep mining has the characteristics of high ground stress,high karst water pressure and strong disturbance, compared to shallow mining,floor water inrush became a complex rock mass water problem under the influence of structure,water-rock-stress and excavation engineering. Based on the characteristics of different geological structure in- fluenced by mining and water-inrush mechanism in floor,the water inrush disaster mode in deep mining was divided into three types,floor fracture spreading type,primary channel conduction type and buried structure shear type,and the corresponding water inrush criterion was deduced. The first can be ascribed to the dank height of confined water grea- ter than the bed thickness of effective confining crack expansion caused by confined water. The second can be ascribed to the communication between separation crannies in compression zone under the protective coal pillar and the partial displacement of activated geological structure. The third can be ascribed to the rock instability above the structure of shear failure lead to the influx of confined water in goaf with the shortest distance. Study on the evolution process of the space-time water inrush channel of three kinds of water inrush mode by use of similar simulation test system for water inrush from high water pressure floor in deep mining,and the accuracy of water inrush criterion is verified.