Analysis method for influence of impact vibration on physical parameters of shale

The invention relates to an analysis method for the influence of impact vibration on physical parameters of shale. The analysis method comprises: (1) carrying out X-ray three-dimensional micro-CT scanning test on a shale sample before and after actions having different impact vibration amplitudes; (2) obtaining the pore fissure development number change and the pore fissure development scale change of the sample before and after impact vibration, and obtaining the influence of the impact vibration amplitude and the impact vibration number on shale fissure development characteristics; (3) determining the elastic modulus, the compressive strength and the Poisson ratio of the shale sample before and after the vibration; (4) obtaining the change law of the mechanical parameters such as the elastic modulus, the compressive strength and the Poisson ratio along with the artificial vibration frequency and the amplitude after the vibration; (5) establishing a change relationship between the impact vibration parameters and the shale permeability; (6) determining the law of the influence of the impact vibration parameters on the shale gas adsorption/desorption characteristics, and establishing a description relationship between the impact vibration parameters and the shale gas adsorption amount; and (7) selecting the impact vibration parameter combination most favorable for shale gas extraction.