Multiscale fracture characteristics and failure mechanism quantification method of cracked rock under true triaxial compression

被引：35
作者：
Li, Bangxiang [1 ,3 ]
Yu, Song [2 ]
Yang, Lei [1 ]
Zhu, Weishen [1 ]
Xue, Yiguo [1 ]
Feng, Dai [1 ,3 ]
Wang, Chen [1 ,3 ]
Chen, Yunjuan [4 ,5 ]
机构：
[1] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Peoples R China
[2] Shandong Univ, Sch Civil Engn, Jinan 250061, Peoples R China
[3] Shandong Univ, Sch Qilu Transportat, Jinan 250002, Peoples R China
[4] Shandong Jianzhu Univ, Minist Educ, Key Lab Bldg Struct Retrofitting & Underground Sp, Jinan 250101, Peoples R China
[5] Shandong Jianzhu Univ, Civil Engn Coll, Jinan 250101, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2022年 / 262卷
基金：
中国国家自然科学基金;
关键词：
True triaxial test; Cracked rock; Multiscale fracture characteristic; Fractal theory; Rock failure mechanism; Quantifying method; INTERMEDIATE PRINCIPAL STRESS; PERMEABILITY EVOLUTION; APPARATUS; COALESCENCE; SANDSTONE; SPECIMENS; STRENGTH; BEHAVIOR; MARBLE; COAL;
D O I：
10.1016/j.engfracmech.2022.108257
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The failure mechanism of rock masses is an important issue concerning the safe construction of underground engineering. Here, we conduct a series of true triaxial experiments on sandstone to investigate the fracture characteristics and failure mechanism of cracked rock. The multiscale fracture characteristics of the fracture surface are summarized, and the mechanisms of different types of fractures are identified. A novel method for quantifying the rock failure mechanism is proposed. The applicability of the Mohr-Coulomb criterion is also discussed. The experimental results reveal that the fracture mechanism can be qualitatively defined by the multiscale fracture characteristics. Four types of fractures with different mechanisms are classified. The correlation between the fractal dimension and the fracture mechanism is established by fractal theory. Based on the fractal dimension, the rock failure parameter delta is defined to quantify the rock failure mechanism, and the influence of sigma(3), sigma(2), and pre-existing flaws on the rock failure mechanism is studied. The proportion of tension fractures in the failure of rock has a positive correlation with sigma(3) and a negative correlation with sigma(2). The presence of pre-existing flaws has a significant promoting effect on the development of fractures. However, this promoting effect presents no obvious bias on the initiation of tension or shear fractures.
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页数：21
相关论文
共 69 条
[21]   Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions [J].
He, M. C. ;
Miao, J. L. ;
Feng, J. L. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2010, 47 (02) :286-298
[22]   Experimental Study on Strain Burst Characteristics of Sandstone Under True Triaxial Loading and Double Faces Unloading in One Direction [J].
He, Manchao ;
Ren, Fuqiang ;
Liu, Dongqiao ;
Zhang, Shudong .
ROCK MECHANICS AND ROCK ENGINEERING, 2021, 54 (01) :149-171
[23]   Response of Castlegate sandstone to true triaxial states of stress [J].
Ingraham, M. D. ;
Issen, K. A. ;
Holcomb, D. J. .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2013, 118 (02) :536-552
[24]   Use of acoustic emissions to investigate localization in high-porosity sandstone subjected to true triaxial stresses [J].
Ingraham, Mathew D. ;
Issen, Kathleen A. ;
Holcomb, David J. .
ACTA GEOTECHNICA, 2013, 8 (06) :645-663
[25]  
Ingraham MD, 2010, TRUE TRIAXIAL TESTIN, P5
[26]   Effect of the propagation direction of the weak dynamic disturbance on rock failure: an experimental study [J].
Jiang, Jianqing ;
Su, Guoshao ;
Liu, Yanxin ;
Zhao, Guofu ;
Yan, Xiaoyang .
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2021, 80 (02) :1507-1521
[27]   An experimental investigation on stress-induced cracking mechanisms of a volcanic rock [J].
Kong, Rui ;
Tuncay, Ergun ;
Ulusay, Resat ;
Zhang, Xiwei ;
Feng, Xia-Ting .
ENGINEERING GEOLOGY, 2021, 280
[28]   Study on crack initiation and damage stress in sandstone under true triaxial compression [J].
Kong, Rui ;
Feng, Xia-Ting ;
Zhang, Xiwei ;
Yang, Chengxiang .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2018, 106 :117-123
[29]   True triaxial strength, deformability, and brittle failure of granodiorite from the San Andreas Fault Observatory at Depth [J].
Lee, Hikweon ;
Haimson, Bezalel C. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2011, 48 (07) :1199-1207
[30]   A Novel True Triaxial Apparatus to Study the Geomechanical and Fluid Flow Aspects of Energy Exploitations in Geological Formations [J].
Li, Minghui ;
Yin, Guangzhi ;
Xu, Jiang ;
Li, Wenpu ;
Song, Zhenlong ;
Jiang, Changbao .
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (12) :4647-4659
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