Abstract: Taking the Fenghuangshan mine of Jincheng and the closed mines, around it as the research object, combined with the geological and hydrogeological data of each mine, the threat of gob water in the Fenghuangshan mine by the closed mines was analyzed, and the treatment plan was proposed. The analysis results are as the follows:According to the geostatistical method, the study area is a monoclinic structure with inclination to the northwest. The district 5 of Wangtaipu mine, the district 4 and the 610 m water warehouse of Gushuyuan mine were the gathering areas of the mined water. The water level was 625 m when gob water of closed mine began to pose a threat to Fenghuangshan mine, the water storage space under 625 m elevation of Gushuyuan mine was 2 608 976 m³, the water level took about 217 d to rise to 625 m. The water storage space under the 625 m elevation of Wangtaipu mine was 1 281 288 m³, the water level took about 64 d to rise to 625 m. By establishing a direct discharge system in the ground of the closed mines and controlling the water level below a certain elevation, the safe production of Fenghuangshan mine was ensured.