With some practical examples, this paper points out that, in the sedimentary rock-covered area, the application of the JGS-1B integrated digital logging system to the performance of coalfield geophysical logging can yield satisfactory result. This technique can solve geological problems in a visual way, provide reliable geological data for the dynamic management of coal resources in the coal mine, coal reserve checking and coal mine production, and reflect physical character of the coal seam effectively. Obvious results can be obtained in such aspects as stratification of coal seams, spatial geometric (depth, thickness) measurement and structural quality analysis.