Abstract: Through the theoretical research and practice about the mining conditions finder water Pressure for many years, the mechanism of water inrush through floor in working area is clearly expounded basically. Although the deeper research should be carried out in order to grasp quantitatively the relationship between the correlation factor and water inrush. obtaining the aim to forecast fundamentally the water inrush, the analysis of mining conditions under water pressure and the e-valuating method of water inrush possibility could be concouded from the sporadical practical measuring data which were obtained from the water inrush condition reseaches on working faces in some representative mining bureaus (mine). The methods are more precise than the "water inrush coefficient" method. This paper takes the Dongpang Coal Mine in Xingtai as the research example.