Article
Engineering, Geological
Chenxi Ding, Renshu Yang, Liyun Yang
Summary: In this study, static stress is utilized to simulate high in-situ stress in a deep rock mass, and its effect on blast-induced cracking is analyzed. The results show that static stress increases the fractal dimension of the blast-induced crack and the degree of damage to the medium, influencing the propagation behavior of the crack.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Civil
Yiqiang Kang, Renshu Yang, Liyun Yang, Yongliang Li, Man Yao, Shirui Gu
Summary: This study investigates the influence of joints on rock fragmentation using tunnel boring machines. The indentation tests and digital image correlation method are employed to capture the process of rock fragmentation. Simulation based on cohesive element with zero thickness is conducted to simulate the failure process and evolution of jointed rock. It is found that the rock with joints is more easily broken than intact rock mass under the action of double cutters, and the joint acts as a weak interface in the rock mass. Finally, the rock mass is destroyed along the vertical joint, forming rock slag.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Thermodynamics
Song Cui, Songyong Liu, Hongsheng Li, Fangyue Zhou, Dunkai Sun
Summary: The high-pressure foam fracturing method is a new and mild rock breaking method that has advantages such as no spark, less dust, no harmful gas, and controllable breaking shape. In this study, the rock breaking characteristics of rock samples were investigated using a high-pressure foam fracturing device. The impact of borehole depth, seal length, and foam pressure on rock breaking was analyzed. The results showed that the rock breaking weight increased with an increase in borehole depth and foam pressure, and decreased first and then increased with a decrease in seal length. Certain conditions were identified where the failure mode of the rock changed. These findings provide important guidance for understanding the rock breaking mechanism and engineering application of the high-pressure foam fracturing method.
Review
Engineering, Geological
Fanzhen Meng, Louis Ngai Yuen Wong, Hui Zhou
Summary: The research reviewed various definitions of rock brittleness and identified 80 brittleness indices, showing a lack of standardization in the measurement methods. It was found that different field-specific indices are not directly applicable to others, and some empirically-obtained indices may not truly reflect rock brittleness.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Energy & Fuels
Pengyu Wang, Shuhong Wang, Alipujiang Jierula, Zihan Sun
Summary: This study investigates the connection and bifurcation problems of rock crack propagation by inserting cohesive elements, and finds the best method for insertion. Results show that using the maximum principal stress criterion and displacement law can achieve the best simulation outcomes.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2021)
Article
Engineering, Mechanical
Chunyu Li, Youjun Ning, Xinlian Liu
Summary: In this study, a sub-block element DDA method is used to simulate crack evolution in brittle materials under dynamic loading. The method is validated through numerical examples and shows good agreement with experimental results or other numerical methods.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Shuyu Wang, Linjuan Wang, Yunteng Wang
Summary: In this paper, a peridynamic model is proposed to investigate the influence of material heterogeneity on blast-induced crack initiation and propagation in brittle rock. The introduction of discretization in polar coordinates helps to avoid misleading directional guidance to crack initiation. The results demonstrate that the locations and sequence of crack initiation are determined by material heterogeneity, and cracks tend to propagate in rock with stronger heterogeneity.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Multidisciplinary
Zediao Chen, Feng Liu
Summary: Crack propagation in brittle materials is crucial for structural safety evaluation and has wide-ranging impacts. The particle Discontinuous Deformation Analysis (DDA) is an effective method for modeling and understanding the complex behavior of cracks in brittle materials under static and dynamic loadings. By carefully investigating various stress and geometric conditions, the particle DDA can accurately reproduce crack propagation patterns and provide valuable insights into the fracture mechanism of materials.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Geochemistry & Geophysics
Donghao Lan, Hongjian Deng, Yanan Gao, Yunlong Wang, Guangkai Zhang
Summary: In this paper, the rock fragmentation and crack propagation induced by tunnel boring machine (TBM) tunneling in anisotropic rock are studied. The study reveals the four stages of rock fragmentation and provides insights into the influence of indentation depth, angle of lateral cracks, and intrusion velocity on the process.
JOURNAL OF GEOPHYSICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Lizhou Wu, Jianting Zhou, Lin Luo, L. P. Yang
Summary: The relationship between velocity, acceleration, and dynamic fracture toughness during rapid crack propagation is investigated using a novel experiment setup. The dynamic stress intensity factor is studied using an experimental-numerical-analytical method, revealing its variation over time. Furthermore, acceleration is used to analyze the unsteady crack propagation process.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Multidisciplinary Sciences
Yao Xiao, Huafeng Deng, Jianlin Li, Meiling Zhou, Eleyas Assefa, Xingzhou Chen
Summary: The objective of this study was to develop a comprehensive quantitative rock classification system based on rock failure characteristics. Crack density and crack saturation were introduced as rock classification indices through rigorous statistical analyses on 200 rock samples. This study significantly advances the understanding of rock failure mechanisms and provides valuable insights into the overall characteristics of rocks.
SCIENTIFIC REPORTS
(2023)
Article
Computer Science, Interdisciplinary Applications
Luming Zhou, Shu Zhu, Zhende Zhu
Summary: This paper proposes an ordinary state-based peridynamic (OS-PD) model based on the Cosserat continuum to predict the propagation and coalescence of rock cracks. Compared with the classical OS-PD model, the pairwise moment between two material points is also considered in the proposed Cosserat ordinary state-based peridynamic (COS-PD) model. The rotational stiffness and rotation angle are introduced to characterize the microdeformation and microstructure of rock, and the expression of rotational stiffness coefficient is derived. Three numerical cases are presented to compare the performance of OS-PD model and COS-PD model, and the effect of rotational stiffness on crack growth is investigated. The results show that the introduction of pairwise moment accelerates the rock failure process, and the crack propagation type and coalescence mode are more inclined to shear failure with the increase of rotation stiffness coefficient. Compared with experimental results, it is found that the COS-PD model can extend the classical OS-PD model and better capture the evolution process of the rock crack.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Multidisciplinary Sciences
Hewan Li, Jian Liu, Laigui Wang, Tianjiao Ren
Summary: This paper proposes a method to analyze rock samples with different inclination angles from the standpoint of energy, using the bond-base peridynamic theory and the PMB model of brittle materials, combined with laboratory experiments. The whole process of shearing is analyzed, and the LAMMPS software is used to simulate the internal energy change of rock-like materials under shear conditions. The result shows that prefabricated cracks and the inclination of cracks are important factors for specimen damage, which has important theoretical value for rock mechanics research. The research results can reduce the occurrence of rock burst accidents, the difficulty of mine support, and the cost of mining engineering, as well as improve mine safety levels.
SCIENTIFIC REPORTS
(2023)
Article
Mechanics
Cungen Wang, Shuhong Wang
Summary: This study modified the generalized maximum tangential stress criterion by considering parallel and perpendicular nonsingular stresses, successfully simulating open and closed crack propagation and modeling. The simulation results were in good agreement with experimental data.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Energy & Fuels
Xiao Huang, Chong Shi, Huaining Ruan, Yiping Zhang, Wei Zhao
Summary: This study investigates the stable crack propagation characteristics of rocks and proposes a rock crack stable propagation model based on crack strain, showing its effectiveness through experimental data.
Article
Engineering, Geological
L. He, X. M. An, X. B. Zhao, Z. Y. Zhao, J. Zhao
ROCK MECHANICS AND ROCK ENGINEERING
(2018)
Article
Engineering, Geological
Y. L. Gui, W. Hu, Z. Y. Zhao, X. Zhu
Article
Engineering, Geological
J. Shang, L. J. West, S. R. Hencher, Z. Zhao
Article
Computer Science, Interdisciplinary Applications
Xiaoying Liu, Zhiye Zhao
COMPUTERS AND GEOTECHNICS
(2018)
Article
Construction & Building Technology
Shuqi Ma, Zhiye Zhao, Jun Peng, Yilin Gui
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Review
Engineering, Geological
J. Shang, L. J. West, S. R. Hencher, Z. Zhao
ENGINEERING GEOLOGY
(2018)
Article
Engineering, Geological
J. Shang, Z. Zhao, M. M. Aliyu
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2018)
Article
Engineering, Geological
Y. L. Gui, Z. Y. Zhao, L. B. Jayasinghe, H. Y. Zhou, A. T. C. Goh, M. Tao
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2018)
Article
Engineering, Geological
J. Shang, Z. Zhao, J. Hu, K. Handley
ROCK MECHANICS AND ROCK ENGINEERING
(2018)
Article
Engineering, Mechanical
J. Shang, Y. Gui, Z. Zhao
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2018)
Article
Construction & Building Technology
W. Nie, Z. Y. Zhao, S. Q. Ma, W. Guo
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2018)
Article
Engineering, Geological
Lei He, Qian Tian, Zhiye Zhao, Xiaobao Zhao, Qianbing Zhang, Jian Zhao
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2018)
Article
Engineering, Multidisciplinary
Xiaoying Liu, Zhiye Zhao, Xinmei An, Yuyong Jiao
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2018)
Article
Engineering, Geological
L. B. Jayasinghe, Z. Y. Zhao, A. T. C. Goh, H. Y. Zhou, Y. L. Gui, M. Tao
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2018)
Article
Computer Science, Interdisciplinary Applications
J. Shang, K. Duan, Y. Gui, K. Handley, Z. Zhao
COMPUTERS AND GEOTECHNICS
(2018)
