Abstract: Taking Majiliang Mine of Jineng Holding Coal Industry Group as the example, aiming at the problem of safe mining of Carboniferous coal seam under the integrated influence of riverbed and goaf, by means of field survey, geophysical exploration and drilling, the surface runoff morphology and periodic water change were analyzed, and the geophysical anomaly areas of upper Jurassic coal seam were delineated; according to the critical value of rock movement angle and spatial distribution characteristics, the height value of fracture zone in Carboniferous coal seam mining is solved, and the partition mining height of working face in Carboniferous coal seam is determined by comprehensive geophysical prospecting, fracture zone distribution, coal thickness variation and roof characteristics. The results show that: Jurassic coal seam goaf is filled by the surface runoff locally, and there is a water accumulation area in the middle. It is concluded that Carboniferous coal seam mining fracture zone does not extend to Jurassic coal seam goaf.