Abstract: In view of the problem of water hazard prevention under the condition of water-rich roof of the first mining panel in Mindong No.1 Coal Mine, based on the data collected from the geological drilling column, the "height prediction of fractured water-conducting zone based on the key stratum position" was adopted to predict the height of the fractured water-conducting zone in the first mining panel from 01 working face to 04 working face, and the results were 82.80 m, 83.06 m, 45.65 m, and 61.10 m respectively. At the same time, the prediction result of 02 working face was verified by drilling engineering exploration of aquifer fissure development, the accuracy of the predicted results were verified.