Fracture Behavior of Rock with Initial Damage: Theoretical, Experimental, and Numerical Investigations

Hui Zhang,Yixian Wang,Panpan Guo,Yan Liu,Hang Lin,Yanlin Zhao,Yahui Shao

doi:10.1155/2020/8886843

Abstract

Geomaterials such as rock mass often have initial damage under the influence of long-term geological action and hydration corrosion environment. The initial damage affects the integrity and stability of the rock mass, resulting in a difference in the mechanical properties of jointed rock mass and intact one. Therefore, the study of the fracture and failure characteristics of the jointed rock mass is of great significance. Most of the previous researches into the fracture behavior of rock with initial damage are based on model testing, theoretical analysis, and numerical simulation of rock mass with preexisting flaws. This review concentrates on the theoretical, experimental, and numerical efforts that have been devoted to the fracture characteristics of rock or rock-like specimens with preexisting flaws under compression. Some suggestions on the future research work in this field are also given.

Highlights

In practical engineering structures, natural rock masses often have initial damage such as joints and fissures under the influence of long-term geological action and hydration corrosion environment
The study of the fracture and failure characteristics of jointed rock mass is of great significance to engineering
Considering that there are few summary works on the fracture behavior of rock with initial damage at present, this review briefly concludes these achievements in theoretical, experimental, and numerical aspects aiming to keep readers informed of the research progress in this field and give them suggestions on the problems and the future research direction

Summary

Introduction

Natural rock masses often have initial damage such as joints and fissures under the influence of long-term geological action and hydration corrosion environment. These defects affect the integrity of the rock, resulting in nonlinear, heterogeneous, anisotropy, and other characteristics of the rock mass [1, 2]. Considering that there are few summary works on the fracture behavior of rock with initial damage at present, this review briefly concludes these achievements in theoretical, experimental, and numerical aspects aiming to keep readers informed of the research progress in this field and give them suggestions on the problems and the future research direction

Theoretical Achievements on Fracture Criteria

Experimental Specimens and Results

Numerical Simulation Methods

Discussion and Conclusions

Conflicts of Interest