Chengzhuang Mine KDX118 collapse column was taken as an example, according to geophysical exploration result, the expected poor water, without conduction KDX118 collapse column was conducted mining dynamic simulation. Through Flac3D numerical modeling, the mining zone damage situation and mining pressure stress change situation under mechanized caving working face though collapse column were shown. Stress concentration law when pushing collapse column was discussed, which recycled the coal resources as much as possible under safe mining and provided reference for optimizing working face. The observation result was used to conduct feasibility demonstration for the mine dealing with collapse column, which provided the technical reference for next production.