Abstract: Based on the research background of Datong mastery of the integrated and reorganized coal mine, the feasibility of 9# coal bed kicking and the stability of coal pillar in 12# coal bed pillar type mining area are first determined by theoretical calculation, and then the rock stratum structure in the kicking of 9# coal seam is revealed by the technology of borehole flooding and borehole peeping. The results show that the height distance of the overlying strata in the room column residual zone is not more than 10m, the height of the fracture zone is about 25m, and the 9# coal seam is located in the curved subsidence belt .The rock stratum has only internal damage, no large-scale step subsidence, good integrity and integrity, can be exploited by kicking mining.