Hongjie Liu
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
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Research Interests
Hongjie Liu has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Juntao Ma
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
1 shared publication - Qin Zhou
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, China
1 shared publication - Xue Ling
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
1 shared publication - Zhiqiao Wang
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
1 shared publication
Latest Publications
- Open Access
- 6 October 2023
- Published by MDPI AG in Applied Sciences
- Vol. 13 (19) , 11028
Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting
In order to study the mechanism of crack propagation in rock cutting, experiments and discrete element numerical simulation of rock cutting at different depths were adopted in this paper. The rock fragmentation can be divided into mini-size fragmentation and normal-size fragmentation from a size viewpoint. The discrete element method (DEM) is used to further investigate the mechanism of normal size fragmentation at different depths and record the process of crack initiation and propagation. Additionally, the paper characterizes the process of crack initiation and examines the representative rock fragmentation. According to the mechanism of crack development, rock fragmentation can be divided into three categories: conventional failure, fracture failure, and damage failure. The fragmentation of three kinds of failure has one common point. To form semi-dislodged rock fragmentation, the macroscopic shear cracks are first formed. Subsequently, the tensile failure at weak places causes fragmentation ejection. Therefore, the mechanism of fragmentation generation in rock cutting is investigated in terms of crack initiation and extension. In this study, the fracture phenomenon of previous rock cutting experiments is reproduced by an experiment, and the failure process is analyzed in detail by the discrete element method, which reveals the essence of producing fragment phenomena and summarizes the fracture phenomenon and damage crack propagation mechanism in rock cutting.
- 6 October 2023
- Published by MDPI AG in Applied Sciences
- Vol. 13 (19) , 11028
Open AccessResearch on the Development Mechanism of Three Kinds of Cracks in Rock Cutting
In order to study the mechanism of crack propagation in rock cutting, experiments and discrete element numerical simulation of rock cutting at different depths were adopted in this paper. The rock fragmentation can be divided into mini-size fragmentation and normal-size fragmentation from a size viewpoint. The discrete element method (DEM) is used to further investigate the mechanism of normal size fragmentation at different depths and record the process of crack initiation and propagation. Additionally, the paper characterizes the process of crack initiation and examines the representative rock fragmentation. According to the mechanism of crack development, rock fragmentation can be divided into three categories: conventional failure, fracture failure, and damage failure. The fragmentation of three kinds of failure has one common point. To form semi-dislodged rock fragmentation, the macroscopic shear cracks are first formed. Subsequently, the tensile failure at weak places causes fragmentation ejection. Therefore, the mechanism of fragmentation generation in rock cutting is investigated in terms of crack initiation and extension. In this study, the fracture phenomenon of previous rock cutting experiments is reproduced by an experiment, and the failure process is analyzed in detail by the discrete element method, which reveals the essence of producing fragment phenomena and summarizes the fracture phenomenon and damage crack propagation mechanism in rock cutting.