Cracking behavior of rock containing non-persistent joints with various joints inclinations

被引：109

作者：

Chen, Miao ^{[1
,2
,3
]}

Yang, Sheng-Qi ^{[2
]}

Ranjith, Pathegama Gamage ^{[3
]}

Zhang, Yuan-Chao ^{[4
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Peoples R China

[2] China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China

[3] Monash Univ, Dept Civil Engn, Melbourne, Vic 3800, Australia

[4] Nagasaki Univ, Grad Sch Engn, Nagasaki 8528521, Japan

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2020年 / 109卷 / 109期

基金：

中国国家自然科学基金;

关键词：

Non-persistent joints; PFC3D; Cracking process; Three-dimensional fracture model; Displacement field; BONDED-PARTICLE MODEL; NON-PERSISTENT JOINTS; MECHANICAL-BEHAVIOR; UNIAXIAL COMPRESSION; COALESCENCE BEHAVIOR; NUMERICAL-SIMULATION; PROGRESSIVE FAILURE; MULTIPLE FLAWS; STRENGTH; FRACTURE;

D O I：

10.1016/j.tafmec.2020.102701

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Non-persistent joints are commonly observed in the rock mass, and play a significant role in the stability of rock engineering. A detailed understanding of the cracking process is critical for the evaluation and control of the stability of surrounding rock. Using a three-dimensional Particle Flow Code (PFC), the influence of the joints inclination on the mechanical behavior and the associated cracking process and displacement field of specimens containing non-persistent joints were investigated in this study. First, the micro parameters used in the PFC3D model were calibrated based on the mechanical properties of the experimental material. Next, cubical specimens containing 9 non-persistent joints were created using the particle deletion method. The results of the simulated compressive experiment show that different joints inclinations result in variations in the mechanical properties and failure modes of specimens containing non-persistent joints. The internal fracture patterns in PFC3D were compared with that of the reconstructed model from X-ray CT scanning. Finally, further detailed research on the cracking process and displacement field mode were conducted to reveal the failure mechanism of specimens containing non-persistent joints with various joints inclinations.

引用

页数：16

共 59 条

[1] Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression [J].