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Intermediate Principal Stress Effect on Time-dependent Behavior of Deep Hard Rock in Excavation Damage Zone
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Pei-yang YU1, Xiu-li DING1, Peng-zhi PAN2, Shu-ling HUANG1
Water Resources and Power | 2023, 41(8) : 170 - 174
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Water Resources and Power | 2023, 41(8): 170-174
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Intermediate Principal Stress Effect on Time-dependent Behavior of Deep Hard Rock in Excavation Damage Zone
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Pei-yang YU1, Xiu-li DING1, Peng-zhi PAN2, Shu-ling HUANG1
Affiliations
  • 1.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Published: 2023-08-25 doi: 10.20040/j.cnki.1000-7709.2023.20230162
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Based on elasto-viscoplastic theory of Perzyna and strain energy theory and 3D yield criterion considering the effect of intermediate principal stress, a mesoscopic coupled elasto-viscoplastic-damage model is developed in order to explore the intermediate principal stress effect on the time-dependent behavior of deep hard rock in excavation damage zone. The model is implemented in a software for engineering rockmass fracturing process (CASRock). By comparing modeling results with experimental results, the model and the code are validated. Furthermore, the time-dependent behaviour of #1 laboratory of CJPL-II project is simulated, and the time-dependent fracture process of hard rock in excavation damage zones under different intermediate principal stresses are investigated. The results show that the time-dependent fracture behavior of hard rock exhibits an obvious interval effect of intermediate principal stress. It is found that the interval effect of the intermediate principal stress is affected by time through the isochronous curve clusters of the total viscoplastic strain and the intermediate principal stress. Finally, the existence of the excavation damage zone can promote the development of time-dependent fracture of its internal surrounding rock, thereby expanding the scope of the plastic zone.

intermediate principal stress  /  elasto-viscoplastic-damage creep model  /  time-dependent fracture  /  excavation damage zone  /  long-term strength
Pei-yang YU, Xiu-li DING, Peng-zhi PAN, Shu-ling HUANG. Intermediate Principal Stress Effect on Time-dependent Behavior of Deep Hard Rock in Excavation Damage Zone[J]. Water Resources and Power, 2023 , 41 (8) : 170 -174 . DOI: 10.20040/j.cnki.1000-7709.2023.20230162
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20230162
  • Receive Date：2023-02-09
  • Online Date：2026-01-28
  • Published：2023-08-25
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History
  • Received：2023-02-09
  • Revised：2023-03-24
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Affiliations
    1.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
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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
species (%)
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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