Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave
To study the characteristics of rock fracture in deep underground under blast loads, some numerical models were established in AUTODYN code. Weibull distribution was used to characterize the inhomogeneity of rock, and a linear equation of state was applied to describe the relation of pressure and vo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/2579569 |
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| author | Zheming Zhu Weiting Gao Duanying Wan Meng Wang Yun Shu |
| author_facet | Zheming Zhu Weiting Gao Duanying Wan Meng Wang Yun Shu |
| author_sort | Zheming Zhu |
| collection | DOAJ |
| description | To study the characteristics of rock fracture in deep underground under blast loads, some numerical models were established in AUTODYN code. Weibull distribution was used to characterize the inhomogeneity of rock, and a linear equation of state was applied to describe the relation of pressure and volume of granite elements. A new stress initialization method based on explicit dynamic calculation was developed to get an accurate stress distribution near the borehole. Two types of in situ stress conditions were considered. The effect of heterogeneous characteristics of material on blast-induced granite fracture was investigated. The difference between 2D models and 3D models was discussed. Based on the numerical results, it can be concluded that the increase of the magnitude of initial pressure can change the mechanism of shear failure near the borehole and suppress radial cracks propagation. When initial lateral pressure is invariable, with initial vertical pressure rising, radial cracks along the acting direction of vertical pressure will be promoted, and radial cracks in other directions will be prevented. Heterogeneous characteristics of material have an obvious influence on the shear failure zones around the borehole. |
| format | Article |
| id | doaj-art-276ed0ee02274ca09ab5d03a73d891bd |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-276ed0ee02274ca09ab5d03a73d891bd2025-08-20T02:04:48ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/25795692579569Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress WaveZheming Zhu0Weiting Gao1Duanying Wan2Meng Wang3Yun Shu4State Key Laboratory of Hydraulics and Mountain River Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaFailure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, ChinaMOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaMOE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, ChinaFailure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, ChinaTo study the characteristics of rock fracture in deep underground under blast loads, some numerical models were established in AUTODYN code. Weibull distribution was used to characterize the inhomogeneity of rock, and a linear equation of state was applied to describe the relation of pressure and volume of granite elements. A new stress initialization method based on explicit dynamic calculation was developed to get an accurate stress distribution near the borehole. Two types of in situ stress conditions were considered. The effect of heterogeneous characteristics of material on blast-induced granite fracture was investigated. The difference between 2D models and 3D models was discussed. Based on the numerical results, it can be concluded that the increase of the magnitude of initial pressure can change the mechanism of shear failure near the borehole and suppress radial cracks propagation. When initial lateral pressure is invariable, with initial vertical pressure rising, radial cracks along the acting direction of vertical pressure will be promoted, and radial cracks in other directions will be prevented. Heterogeneous characteristics of material have an obvious influence on the shear failure zones around the borehole.http://dx.doi.org/10.1155/2021/2579569 |
| spellingShingle | Zheming Zhu Weiting Gao Duanying Wan Meng Wang Yun Shu Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave Shock and Vibration |
| title | Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave |
| title_full | Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave |
| title_fullStr | Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave |
| title_full_unstemmed | Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave |
| title_short | Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave |
| title_sort | numerical study of fracture characteristics of deep granite induced by blast stress wave |
| url | http://dx.doi.org/10.1155/2021/2579569 |
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