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 vie...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/19/11028 |
| _version_ | 1797576173547421696 |
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| author | Juntao Ma Xue Ling Qin Zhou Zhiqiao Wang Hongjie Liu |
| author_facet | Juntao Ma Xue Ling Qin Zhou Zhiqiao Wang Hongjie Liu |
| author_sort | Juntao Ma |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T21:48:30Z |
| format | Article |
| id | doaj.art-4bca4342d0634a38bdd00a1251ab0275 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T21:48:30Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-4bca4342d0634a38bdd00a1251ab02752023-11-19T14:07:35ZengMDPI AGApplied Sciences2076-34172023-10-0113191102810.3390/app131911028Research on the Development Mechanism of Three Kinds of Cracks in Rock CuttingJuntao Ma0Xue Ling1Qin Zhou2Zhiqiao Wang3Hongjie Liu4School of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaSchool of Engineering and Technology, China University of Geosciences, Beijing 100083, ChinaIn 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.https://www.mdpi.com/2076-3417/13/19/11028rock cuttingcrack initiation and propagationrock fragmentdiscrete element method |
| spellingShingle | Juntao Ma Xue Ling Qin Zhou Zhiqiao Wang Hongjie Liu Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting Applied Sciences rock cutting crack initiation and propagation rock fragment discrete element method |
| title | Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting |
| title_full | Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting |
| title_fullStr | Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting |
| title_full_unstemmed | Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting |
| title_short | Research on the Development Mechanism of Three Kinds of Cracks in Rock Cutting |
| title_sort | research on the development mechanism of three kinds of cracks in rock cutting |
| topic | rock cutting crack initiation and propagation rock fragment discrete element method |
| url | https://www.mdpi.com/2076-3417/13/19/11028 |
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