Investigation of mechanical properties and crack propagation in pre-cracked marbles using lattice-spring-based synthetic rock mass (LS-SRM) modeling approach

摘要

In this study, progressive failure and mechanical properties of pre-cracked marbles with planar or non-planar cracks are studied using the lattice-spring-based synthetic rock mass (LS-SRM) modeling approach. The modeling results show that a combination of wing, anti-wing, shear, and secondary cracks are observed in models with pre-existing planar cracks. Complex cracking mechanism is observed in models with pre-existing nonplanar cracks. Both the peak strength and the deformation modulus decrease with the increase of the crack angle, crack length, ligament angle, ligament length, and number of cracks. The influence of crack waviness on the mechanical properties of cracked synthetic model is high only when the crack persistency is large.