Rock mass fracture simulation method and system in true triaxial servo loading state

Abstract

The invention discloses a rock mass fracture simulation method and system in a true triaxial servo loading state. The method comprises the steps of collecting a three-dimensional solid model of a testpiece; performing particle filling on the three-dimensional solid model according to set particle gradation and target porosity to obtain a particle test piece model represented by discrete element particles; obtaining discrete element microcosmic parameter values of a rock sample, and applying the discrete element microcosmic parameter values to the particle test piece model; pre-loading stressaround the particle test piece model based on a true triaxial servo loading program to enable the confining pressure to reach a set value; on the premise that the confining pressure is kept stable, water pressure is exerted step by step, and numerical simulation is conducted on the fracture initiation, expansion and penetration process. The three-dimensional discrete element numerical simulation method based on the particle Bonding model can quantitatively research rock mass fracture and crack propagation rules under the hydraulic coupling effect in a real stress environment.

Description

technical field [0001] The invention relates to the technical field of numerical calculation, in particular to a rock mass rupture simulation method and system under true three-axis servo loading state. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The construction of underground projects such as tunnels and underground chambers is faced with an extreme geological environment of high stress, large buried depth, and strong osmotic pressure. Rock mass is a heterogeneous material, and natural defects such as cracks and structural surfaces can easily expand and evolve under the coupling action of strong osmotic pressure and high ground stress, thereby changing the macroscopic mechanical properties of the rock mass and developing into a rock mass structure that affects the safety of the project. The rupture and instability lead to serious en...

AI Technical Summary

Problems solved by technology

Since the two-dimensional discrete element hydraulic splitting simulation simplifies the plane of the real model, it is impossible to simulate the expansion of cracks in three-dimensional space, and it is difficult to reproduce the spatial three-dimensional shape of cracks. Therefore, it is urgent to develop a set of high computational efficiency and reliable programming. Discrete element hydraulic splitting algorithm

Images