Abstract: Mine separation water disaster has become one of the difficulties in the prevention and control of roof water disasters due to its characteristics of unclear water inrush signs,large instantaneous water volume,hysteresis,periodic water inrush,etc. The research progress in the formation,disaster mechanism,prevention and control technology,monitoring and warning of separation water is systematically summarized. Separation water disaster is the coupling result of stope overburden movement and groundwater movement under the influence of mining. Through the performance of water inrush accidents,the structure and movement characteristics of overburden,the groundwater movement law and the relevant research status,the basic conditions and development rules of separation water are summarized. The mechanism of water inrush causes secondary disasters such as mud and sand collapse,gas emission,and cutting roof support. The vertical and horizontal position prediction of separation water is the key to the prevention and control of separation water disaster. On this basis,five prevention and control methods of separation water are introduced:surface straight-through water discharge hole,separation grouting filling,underground closure hole and underground diversion hole. Combined with the engineering practice,the characteristics and problems are analyzed. The separation water hazard risk is evaluated by the lithology combination and geological conditions of the rock strata. Combined with the monitoring data of water level,microseism,mine pressure,gas and so on in the mining process,the early warning of separation water hazard can be realized. The problems to be solved in the study of separation water are put forward,such as the chain reaction mechanism of separation water and its secondary disasters; The lack of scientific evaluation methods for the prevention and control technology of separation water; the limitations of geophysical detection technology make it difficult to capture accurate data of high separation.