The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel
Rockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinpin...
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| Format: | Article |
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MDPI AG
2019-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/17/3629 |
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| author | Heng Zhang Yimo Zhu Liang Chen Weidong Hu Shougen Chen |
| author_facet | Heng Zhang Yimo Zhu Liang Chen Weidong Hu Shougen Chen |
| author_sort | Heng Zhang |
| collection | DOAJ |
| description | Rockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinping II hydropower station of China, this paper analyzed the mechanical principle of support in the process of construction, and discussed in detail the active release and passive support by numerical simulation and field application. The results show that as two active measures, stress relieve holes and advanced stress relief blasting can release the energy of the microseismic source and transfer the high stress to the deeper surrounding rock, make the surface rock wall with a relatively low stress act as a protective barrier. Their stress release rate is about 12% and 33% in this project, respectively. In term of passive measure, the combined rapid support, which is mainly composed of water swelling anchor and nano-admixture shotcrete, is also an effective way to prevent and control the rockburst under high geostress. |
| first_indexed | 2024-12-12T20:02:04Z |
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| id | doaj.art-1e64b05f1cac430184683f9f3413a5d3 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-12T20:02:04Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-1e64b05f1cac430184683f9f3413a5d32022-12-22T00:13:43ZengMDPI AGApplied Sciences2076-34172019-09-01917362910.3390/app9173629app9173629The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried TunnelHeng Zhang0Yimo Zhu1Liang Chen2Weidong Hu3Shougen Chen4Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha 410076, ChinaChina Railway SIYUAN Survey and Design Group Co., Ltd., Wuhan 430063, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, ChinaRockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinping II hydropower station of China, this paper analyzed the mechanical principle of support in the process of construction, and discussed in detail the active release and passive support by numerical simulation and field application. The results show that as two active measures, stress relieve holes and advanced stress relief blasting can release the energy of the microseismic source and transfer the high stress to the deeper surrounding rock, make the surface rock wall with a relatively low stress act as a protective barrier. Their stress release rate is about 12% and 33% in this project, respectively. In term of passive measure, the combined rapid support, which is mainly composed of water swelling anchor and nano-admixture shotcrete, is also an effective way to prevent and control the rockburst under high geostress.https://www.mdpi.com/2076-3417/9/17/3629deeply buried tunnelhigh stressrockburst characteristicsrockburst damagenumerical simulationsupport system |
| spellingShingle | Heng Zhang Yimo Zhu Liang Chen Weidong Hu Shougen Chen The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel Applied Sciences deeply buried tunnel high stress rockburst characteristics rockburst damage numerical simulation support system |
| title | The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel |
| title_full | The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel |
| title_fullStr | The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel |
| title_full_unstemmed | The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel |
| title_short | The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel |
| title_sort | prevention and control mechanism of rockburst hazards and its application in the construction of a deeply buried tunnel |
| topic | deeply buried tunnel high stress rockburst characteristics rockburst damage numerical simulation support system |
| url | https://www.mdpi.com/2076-3417/9/17/3629 |
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