“In the field of underground engineering safety, experts analyze the failure characteristics and dynamic elastic modulus of fractured rocks through conventional splitting tests, graded cyclic load tests, and non-contact deformation measurement tests, and study the relationship between axial irreversible deformation and fatigue life. From an energy perspective, calculate the total absorbed energy, released strain energy, and dissipated energy during the failure process, and analyze the relationship between energy evolution and crack propagation mode response. The research results indicate that rock fatigue deformation can be divided into three stages, and the hysteresis loop curve exhibits a "sparse dense sparse" characteristic. The total absorbed energy, dissipated energy, and elastic energy all show an upward trend, and dissipated energy rapidly increases after entering the failure stage, with more dissipated energy at medium inclination angles. During the destruction process, wing cracks and inclined secondary cracks will occur, and the interaction and merging of cracks will result in continuous plastic strain accumulation, forming crushed small particle debris, which is different from the brittle failure mechanism under static load.”