Abstract: Take Longtan coal mine of Huayingshan mining area which has typical and complicated geological conditions as the research object, the affect and threaten degree of each water source to mine production was analyzed and evaluated systematically. The evaluation model of threatening water was constructed, and Longtan coal mine area were divided into five water inrush threat levels: no water inrush threat area, weak water inrush threat area, middle-weak water inrush threat area, middle-strong water inrush threat area and strong water inrush threat area by using mine water disaster threat indexs.

Key words: Water disaster, Affect factors, Damage degree, Discriminant model