Abstract: According to the in-situ observation and study of the mine geological structure and tectonic deformation of coal seam in Lushuidong mine,the occurrence and migration laws of coalbed gas in this mine are analyzed systematically,and the geological evaluation to the coalbed gas emission and possibility of dynamic phenomenon taking place in mine production is carried out.It is considered that the possibility of coalbed gas emission from cracks and cave of rockmass in depth of mine is stll existed,and the eastern flank of Tianwan syncline is the area with the highest hazard in burst of coalbed gas in whole mine field.