Abstract: The characteristics of three typical models of rockmass have been studied under room temperature and confining pressure.The results suggest that the stress-strain curves can be divided,into four stages by the behaviours of linear and nonlinear elasticity.The deformation mechanisms are correspondent to the closing of preexisting cracks,elastic deformatiom of grains and pores,macroscope tension (tensile region),shear (compressive region) and main shearing or shearing-tension ruptures,respectively.The resulting processes of these curves stages in longitudinal and transverse direction near the tip of sawcut and in the region of homogeneous stress state were different in time.The fracture propogation related to the change of stress-strain stage was not considered in time and space.The characteristics of stress-strain curves and distributions and sequences of fracture propagation were controlled by structure features of models of sawcut rockmass.Finally the relationship between the developing stages of stress-strain in some points along the seismogenic fault and the preparation of earthquakes,has been discussed.