Abstract: In order to guide the coal mining under water-bering ecologically fragile mining area, the micro-resistivity scanning imaging technique, physical simulation, numerical simulation and the drilling fluid consumption have been applied to show the development law of the water flowing fractured soil layer. The results show that the ratio of the height of the fractured zone to the mining height is 28.1~29.1 by the physical simulation and numerical simulation, and the ratio of the height of the fractured zone to the mining height is 28.3~28.5 by the micro-resistivity scanning imaging technique. The field measurement results are identical with the other methods. Micro-resistivity scanning imaging technique can be applied to detect the development of the height of water flowing fractured zone in the soil layer for other mining areas.