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Research on Catastrophe Instability Criterion of Surrounding Rock under Blasting Action in Shallow-buried Tunnel with Unsymmetrical Pressure
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Rong-zeng MA1, Wen LI1, Ze-hui DU2, Ya-xiong PENG3, Li WU4
Blasting | 2024, 41(4) : 54 - 60
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Blasting | 2024, 41(4): 54-60
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Research on Catastrophe Instability Criterion of Surrounding Rock under Blasting Action in Shallow-buried Tunnel with Unsymmetrical Pressure
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Rong-zeng MA1, Wen LI1, Ze-hui DU2, Ya-xiong PENG3, Li WU4
Affiliations
  • 1.CCCC SHEC (Kunming) Construction Co., Ltd., Kunming 650200, China
  • 2.CCCC Wuhan Harbour Engineering Design and Research Co., Ltd., Wuhan 430040, China
  • 3.Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China
  • 4.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
Published: 2024-12-01 doi: 10.3963/j.issn.1001-487X.2024.04.007
Outline
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To address the instability problem of shallow-buried tunnel with unsymmetrical pressure under blasting, the potential energy equation of surrounding rock was derived by considering both blasting damage and water weakening effect. Using the cusp catastrophe theory and its calculation method, a catastrophe instability criterion of surrounding rock mass in a shallow-buried tunnel with unsymmetrical pressure under blasting was established. Then, the effects of water weakening, blasting damage and unsymmetrical pressure on the instability of the surrounding rock mass were discussed. Taking Dayangan tunnel in the national high-speed G5615 (Tianbao-Malipo section) as an example, a catastrophe criterion k of surrounding rock mass under different working conditions was calculated according to the physical and mechanical parameters of surrounding rock and the results of the field acoustic wave test. Meanwhile, a shallow-buried tunnel's surrounding rock stability state with unsymmetrical pressure was determined. The results show that the necessary condition for abrupt instability in shallow-buried tunnels with biased pressure under blasting is the abrupt failure criterion k<1, indicating a potential state of abrupt instability. The degree of bias pressure is the critical internal factor affecting tunnel instability surrounding rock mass. Additionally, the greater the degree of bias pressure, the more prone the tunnel is to sudden instability. The practical evaluation results are consistent with the field observations, verifying the practicability and validity of the criterion.

tunnel  /  blasting  /  shallow-buried  /  unsymmetrical pressure  /  catastrophe instability
Rong-zeng MA, Wen LI, Ze-hui DU, Ya-xiong PENG, Li WU. Research on Catastrophe Instability Criterion of Surrounding Rock under Blasting Action in Shallow-buried Tunnel with Unsymmetrical Pressure[J]. Blasting, 2024 , 41 (4) : 54 -60 . DOI: 10.3963/j.issn.1001-487X.2024.04.007
Funding
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  • State Key Laboratory of Precision Blasting and Hubei Key Laboratory of Blasting Engineering, Jianghan University(PBSKL2022D08)
  • Scientific research project of Hunan Provincial Department of Education(22B0486)
Appendix
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Year 2024 volume 41 Issue 4
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71
28
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Article Info
doi: 10.3963/j.issn.1001-487X.2024.04.007
  • Receive Date：2024-05-19
  • Online Date：2026-03-19
  • Published：2024-12-01
Article Data
Affiliations
History
  • Received：2024-05-19
Funding
State Key Laboratory of Precision Blasting and Hubei Key Laboratory of Blasting Engineering, Jianghan University(PBSKL2022D08)
Scientific research project of Hunan Provincial Department of Education(22B0486)
Affiliations
    1.CCCC SHEC (Kunming) Construction Co., Ltd., Kunming 650200, China
    2.CCCC Wuhan Harbour Engineering Design and Research Co., Ltd., Wuhan 430040, China
    3.Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China
    4.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

Corresponding:

WU Li (1963-), male, born in Zhuzhou city, Hunan province, professor, mainly engaged in blasting and rock dynamics research, (E-mail) .
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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