Using the special purpose loading equipment made by authors corresponding to CT machine
the computerized tomography (CT) real-time testing of specimen’s failure with single fracture and hydraulic pressure under uniaxial compression has been made. The whole procession of specimen being compressed
new damage coming up and the failure process of hydraulic fracture of rock are simulated .At different axial pressure
clear CT images and CT values of different parts are obtained .With studying the data of test
the threshold value of damage and damage propagation rate are defined; and some discussion of hydraulic pressure’s effect is made. The damage and fracture propagation law of jointed rock has been obtained from meso-scale and three dimensions.