Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses
A 3D numerical model was presented to investigate the blast-induced damage characteristics of highly stressed rock mass. The RHT (Riedel, Hiermaier, and Thoma) model in LS-DYNA was used to simulate the blast-induced damage and its parameters were calibrated by a physical model test. Based on the cal...
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MDPI AG
2021-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/11/4992 |
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| author | Xiaofeng Huo Xiuzhi Shi Xianyang Qiu Hui Chen Jian Zhou Shian Zhang Dijun Rao |
| author_facet | Xiaofeng Huo Xiuzhi Shi Xianyang Qiu Hui Chen Jian Zhou Shian Zhang Dijun Rao |
| author_sort | Xiaofeng Huo |
| collection | DOAJ |
| description | A 3D numerical model was presented to investigate the blast-induced damage characteristics of highly stressed rock mass. The RHT (Riedel, Hiermaier, and Thoma) model in LS-DYNA was used to simulate the blast-induced damage and its parameters were calibrated by a physical model test. Based on the calibrated numerical model, the influences of confining pressure and free surface span on the blast-induced damage characteristics were investigated. The results show that under uniaxial loading, the crater volume increases with confining pressure increases. The uniaxial static load can change the optimal burden and the critical embedding depth of charge. In stressed rock, the variation law of the crater shape affected by radial tensile fractures is opposite to that affected by reflected tensile fractures. Under the biaxial static load, the crater volume of the borehole placed on the side of the max static load is greater than the other side. The explosion crater can be improved by increasing the free surface span on the same side. Finally, it is suggested that the blasting efficiency can be improved by preferentially detonating the charge on the side of the max static load, and then the charge on the other side can be detonated with a wider free surface span. |
| first_indexed | 2024-03-10T10:55:33Z |
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| id | doaj.art-62088e8eb906473ca7684d854c263855 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:55:33Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-62088e8eb906473ca7684d854c2638552023-11-21T21:54:33ZengMDPI AGApplied Sciences2076-34172021-05-011111499210.3390/app11114992Study on Rock Damage Mechanism for Lateral Blasting under High In Situ StressesXiaofeng Huo0Xiuzhi Shi1Xianyang Qiu2Hui Chen3Jian Zhou4Shian Zhang5Dijun Rao6School of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaSchool of Geological and Mining Engineering, Xinjiang University, Tianshan District, Urumqi 830000, ChinaSchool of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Yuelu District, Changsha 410083, ChinaA 3D numerical model was presented to investigate the blast-induced damage characteristics of highly stressed rock mass. The RHT (Riedel, Hiermaier, and Thoma) model in LS-DYNA was used to simulate the blast-induced damage and its parameters were calibrated by a physical model test. Based on the calibrated numerical model, the influences of confining pressure and free surface span on the blast-induced damage characteristics were investigated. The results show that under uniaxial loading, the crater volume increases with confining pressure increases. The uniaxial static load can change the optimal burden and the critical embedding depth of charge. In stressed rock, the variation law of the crater shape affected by radial tensile fractures is opposite to that affected by reflected tensile fractures. Under the biaxial static load, the crater volume of the borehole placed on the side of the max static load is greater than the other side. The explosion crater can be improved by increasing the free surface span on the same side. Finally, it is suggested that the blasting efficiency can be improved by preferentially detonating the charge on the side of the max static load, and then the charge on the other side can be detonated with a wider free surface span.https://www.mdpi.com/2076-3417/11/11/4992blast-induced damageexplosion craterlateral blastingin situ stresslateral free surface |
| spellingShingle | Xiaofeng Huo Xiuzhi Shi Xianyang Qiu Hui Chen Jian Zhou Shian Zhang Dijun Rao Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses Applied Sciences blast-induced damage explosion crater lateral blasting in situ stress lateral free surface |
| title | Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses |
| title_full | Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses |
| title_fullStr | Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses |
| title_full_unstemmed | Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses |
| title_short | Study on Rock Damage Mechanism for Lateral Blasting under High In Situ Stresses |
| title_sort | study on rock damage mechanism for lateral blasting under high in situ stresses |
| topic | blast-induced damage explosion crater lateral blasting in situ stress lateral free surface |
| url | https://www.mdpi.com/2076-3417/11/11/4992 |
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