Research conclusions: The two—dimensional analysis show that there is a certain correlation between the stratum movement and stress release．The displacements of different points and their varying laws of the stress release rate are of obvious differences．Choosing the displacement at one area to describe the displacement release around the tunnel is incomplete，while using the volume loss rate of tunnel excavation to describe the displacement release around the tunnel is more complete．The study results also show that the stratum volume lOSS rate and stress release rate are of a linear relationship basically．This relationship can be as the references to determining the reasonable stress release rate and volume loss rate(displacement release rate)．