In order to finely identify the disasters caused by the previously unknown small coal mine goaf in the Yiyuan Coal Mine of Shenfu Mining Area, and provide scientific basis for goaf management, it is necessary to carry out comprehensive exploration techniques such as transient electromagnetic method, drilling, and logging to investigate the distribution range and water abundance of the goaf.The results show that from the logging curve, it can be seen that the physical properties of the coal layer are stable, and the curve shape is obvious. The coal seam has high resistivity, low density, and low gamma characteristics. The coal seam belongs to a high resistivity layer with poor conductivity (up to 1000Ω·m), while other mudstone, sandy mudstone, sandstone, etc. exhibit relatively low resistivity characteristics. The physical properties of the coal seam and surrounding rock differ significantly;The transient electromagnetic method adopts a parameter combination of 280m rectangular emission wire frame, emission frequency of 25Hz, gain of 22-25, emission current of 8A, and integration time of 15s for detection. The known goaf is clearly reflected, and it is inferred that the total area of the pillar type goaf in the 3-1 coal seam is 0.985km2;Through drilling, the 2-2 coal and 3-1 coal room pillar type goaf were exposed, verifying the geophysical inference of the 3-1 coal goaf. Logging, transient electromagnetic exploration, and drilling are interdependent and complementary, achieving the goal of refined and comprehensive exploration.