Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock
In order to conserve the water resource during underground mining, the fracture and mechanical properties of rock are important for the stability of water-resisting layers, especially for the fracture behavior of boundary cracks containing water in rock. Considering the swelling of rock under water...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6142945 |
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| author | Zhensheng Yang Fulin Li Tianran Ma |
| author_facet | Zhensheng Yang Fulin Li Tianran Ma |
| author_sort | Zhensheng Yang |
| collection | DOAJ |
| description | In order to conserve the water resource during underground mining, the fracture and mechanical properties of rock are important for the stability of water-resisting layers, especially for the fracture behavior of boundary cracks containing water in rock. Considering the swelling of rock under water environment and the influence of water on rock, the stress intensity factors of modes I and II are derived for boundary cracks in rock under compressive and shear stresses. The cracks are divided into the closed and open states. The effects of the crack inclination angle, friction coefficient between crack surfaces, and initial crack length on stress intensity factors are also taken into account. The stress intensity factors for closed and open boundary cracks are verified by numerical and physical experiments, respectively, and the deviation of the results is within 5%. It is shown that pore pressure has different effects on the relationship between stress intensity factor and friction coefficient under different lateral pressures. The effect of water on crack propagation is mainly due to the deterioration of the fracture toughness of the rock. It is found that the critical coefficient λc is a key parameter to determine whether the boundary crack propagates in rock under compression-shear stress. Further studies should be performed to apply the present fracture theory to rock mass or water-resisting layers. |
| format | Article |
| id | doaj-art-83aad6a5bd7b42e5bfcbdf63a928e986 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-83aad6a5bd7b42e5bfcbdf63a928e9862025-08-20T03:37:11ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/61429456142945Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in RockZhensheng Yang0Fulin Li1Tianran Ma2State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaIn order to conserve the water resource during underground mining, the fracture and mechanical properties of rock are important for the stability of water-resisting layers, especially for the fracture behavior of boundary cracks containing water in rock. Considering the swelling of rock under water environment and the influence of water on rock, the stress intensity factors of modes I and II are derived for boundary cracks in rock under compressive and shear stresses. The cracks are divided into the closed and open states. The effects of the crack inclination angle, friction coefficient between crack surfaces, and initial crack length on stress intensity factors are also taken into account. The stress intensity factors for closed and open boundary cracks are verified by numerical and physical experiments, respectively, and the deviation of the results is within 5%. It is shown that pore pressure has different effects on the relationship between stress intensity factor and friction coefficient under different lateral pressures. The effect of water on crack propagation is mainly due to the deterioration of the fracture toughness of the rock. It is found that the critical coefficient λc is a key parameter to determine whether the boundary crack propagates in rock under compression-shear stress. Further studies should be performed to apply the present fracture theory to rock mass or water-resisting layers.http://dx.doi.org/10.1155/2020/6142945 |
| spellingShingle | Zhensheng Yang Fulin Li Tianran Ma Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock Advances in Materials Science and Engineering |
| title | Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock |
| title_full | Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock |
| title_fullStr | Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock |
| title_full_unstemmed | Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock |
| title_short | Compression and Shear Fracture Analysis of Boundary Cracks Containing Water in Rock |
| title_sort | compression and shear fracture analysis of boundary cracks containing water in rock |
| url | http://dx.doi.org/10.1155/2020/6142945 |
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