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Study on Energy Evolution of Hard Rock Under High Confining Pressure and Unloading Condition
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Bao-wen HU1, 2, 3, Cong-rui LV1, Hui SU1, Bo-wen NAN1, Jin-ke SONG1, Jiang-zhe LI1
Water Resources and Power | 2023, 41(6) : 114 - 118
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Water Resources and Power | 2023, 41(6): 114-118
• WATER CONSERVANCY AND HYDROPOWER ENGINEERING •
Study on Energy Evolution of Hard Rock Under High Confining Pressure and Unloading Condition
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Bao-wen HU1, 2, 3, Cong-rui LV1, Hui SU1, Bo-wen NAN1, Jin-ke SONG1, Jiang-zhe LI1
Affiliations
  • 1.School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
  • 2.Beijing Key Laboratory of Urban Underground Space Engineering, Beijing 100083, China
  • 3.Hebei Key Laboratory of Intelligent Water Conservancy, Handan 056038, China
Published: 2023-06-25 doi: 10.20040/j.cnki.1000-7709.2023.20221620
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In order to explore the energy evolution law of rock failure process in the excavation process of diversion tunnel, this paper selects magnetite ore and carries out conventional triaxial and triaxial pre-peak constant axial pressure unloading confining pressure tests. The results show that in the conventional triaxial test, the rock is dominated by elastic strain energy storage and dissipative strain energy consumption before the peak stress, and the elastic strain energy release and dissipative strain energy consumption after the peak stress. With the increase of confining pressure, pre-peak shear fracture energy is higher than post-peak shear fracture energy. In the unloading confining pressure test, the dissipated strain energy increases exponentially. The faster the unloading rate, the shorter the unloading period is, and the higher the rate of energy increment per unit time between the unloading point and the drop point. Based on the M-C criterion of rockburst dynamics, the loss of rock cohesion and the dissipated strain energy of rock under unloading path, the damage variable in the process of rock unloading is defined, and the damage degree of rock deformation and failure is revealed from the perspective of energy.

energy evolution  /  shear fracture energy  /  energy change rate  /  damage variable
Bao-wen HU, Cong-rui LV, Hui SU, Bo-wen NAN, Jin-ke SONG, Jiang-zhe LI. Study on Energy Evolution of Hard Rock Under High Confining Pressure and Unloading Condition[J]. Water Resources and Power, 2023 , 41 (6) : 114 -118 . DOI: 10.20040/j.cnki.1000-7709.2023.20221620
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Year 2023 volume 41 Issue 6
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Article Info
doi: 10.20040/j.cnki.1000-7709.2023.20221620
  • Receive Date：2022-08-06
  • Online Date：2026-01-28
  • Published：2023-06-25
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History
  • Received：2022-08-06
  • Revised：2022-08-27
Funding
Affiliations
    1.School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan 056038, China
    2.Beijing Key Laboratory of Urban Underground Space Engineering, Beijing 100083, China
    3.Hebei Key Laboratory of Intelligent Water Conservancy, Handan 056038, 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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