Fracture evolution of transversely isotropic rocks with a pre-existing flaw under compression tests based on moment tensor analysis

被引：0

作者：

Guowen Xu

Xiongyu Hu

Rui Tang

Zhenkun Hou

机构：

[1] Southwest Jiaotong University,Key Laboratory of Transportation Tunnel Engineering, Ministry of Education

[2] Colorado School of Mines,Department of Civil and Environmental Engineering

[3] University of California,Department of Civil and Environmental Engineering

[4] Sichuan Provincial Transport Department Highway Planning Survey Design and Research Institute,undefined

[5] Guangzhou Institute of Building Science Co.,undefined

[6] Ltd.,undefined

来源：

Acta Geotechnica | 2022年 / 17卷

关键词：

Acoustic emission; Discrete element method; Pre-existing flaw; Transversely isotropic rocks;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A numerical approach based on the particle discrete element theory is adopted to study the fracture evolution of transversely isotropic rocks with a pre-existing flaw under compression tests. In this approach, the rock matrix is simulated by parallel-bonded contacts and weak planes are represented as bonded contacts, and the acoustic emission characteristics of rock matrix and weak planes are obtained and distinguished using the moment tensor analysis. Firstly, the acoustic emission features of the numerical approach were validated against the test results. Then, parametrical studies were conducted to reveal the combined effect of pre-existing flaw and weak planes on the fracturing morphology of rocks, and six failure patterns were identified. Finally, the fracturing evolution process of each pattern was studied based on the moment tensor analysis.

引用

页码：169 / 203

页数：34