Abstract: According to the issue of serious floor heave which is difficult to control in main haulage roadway in Xichuan Coal Mine in Shaanxi province, the methods of field geological investigation,surrounding rock displacement monitoring and theoretical calculation are adopted comprehensively.The main influence factors of floor heave of roadway is analyzed. On this basis,the control principle and control scheme of the floor heave of the thick mudstone floor roadway are put forward and the industrial test is implemented in the field.The result shows that the surrounding rock deformation of the roadway becomes relatively small and the technical and economic benefit are optimal.