Abstract：In order to exploit the low permeability reservoir effectively，the stimulation technology of exploding in fracture is introduced. By the experiment of exploding on the surface of the cement sample in deep water，the phenomenon of the formation rock damage and fracture by exploding wave is simulated. Through optimizing the experiment scheme，there are 3 damage zones are observed，namely，the compressive shear damage zone，the tension damage zone and the damage zone on the boundary；and the initiation and propagation of the micro-fracture have a close relationship with the initial damage of the cement sample. The fracture density in the shear damage zone and tension damage zone has a relationship with the equivalent radius of the explosive load；and the scales of the compressive shear damage zone and the tensile damage zone are 2–5 times and 20–30 times of the equivalent radius of the explosive load respectively. By dimension analysis，it is found that the scales of the shear damage zone and the tension damage zone have a linear relationship with the equivalent radius of the explosive. By simple experiment，it is found that the compressive shear area has finite permeability，which has an important meaning to exploding in fracture. At last，the exploding wave propagation progress and the damage and fracture mechanism are both explained qualitatively.
