Study on Mechanical Properties and Energy Change of Rock Materials in Whole Splitting Process Based on peridynamics

Abstract

Aiming at the problem that the evolution process of rock internal deformation and fracture cannot be observed directly, this paper proposes that based on the bond-base peridynamic theory in peridynamics and the PMB model of brittle materials, combined with laboratory experiments, rock samples with different inclination angles are analyzed from the angle of energy. The method of analyzing the whole process of shearing, and the lammps software is used to simulate the internal energy change of rock-like materials under shear conditions, and the damage evolution law of samples with different dip angles is studied from macro and micro perspectives.The result shows that prefabricated cracks and the inclination of cracks are important factors for specimen damage, which has important theoretical value for rock mechanics research. The research results can reduce the occurrence of rock burst accidents or reduce the difficulty of mine support, reduce the cost of mining engineering, and improve the mine safety level.