Effect of True Triaxial Loading and Unloading Rates on the Mechanical Properties of Deep Rock
文献类型：期刊论文
| 作者 | Gao, Heng2,3; Xie, Heping2,3; Zhang, Ru3; Zhang, Zetian3; Gao, Mingzhong2,3; Lu, Jun2; Wu, Mingyang1; Li, Yihang3; Xie, Hongxin3 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2025-04-27 |
| 页码 | 25 |
| 关键词 | Deep rock True triaxial stress Loading and unloading Mechanical properties Failure |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-025-04555-z |
| 英文摘要 | The acceleration of deep resource exploitation has led to challenges in deep resource development, deep engineering geological disaster prevention, and healthy operation and maintenance, where the stress changes in surrounding rock under different conditions present varying stress loading and unloading rates. To investigate the mechanical properties of deep rock under different loading and unloading rates, several tests were conducted via a multifunctional true triaxial geophysical apparatus. The results indicate that the principal strain of specimen is not directly related to the loading rate but depends on the relative changes in three-dimensional principal stresses caused by complex loading-unloading conditions. In horizontal maximum principal stress unloading (HMAU) tests, the true triaxial strength of specimen gradually decreases with decreasing the rate of change of sigma h,max, with the corresponding failure mode shifting from shear failure to tensile failure, intensifying tensile plastic failure. In horizontal minimum principal stress unloading (HMIU) tests, the true triaxial strength also gradually decreases with decreasing the rate of change of sigma h,min (vh,min), transitioning from tensile-shear failure mode to a more complex failure mode, exacerbating specimen fragmentation. In horizontal minimum principal stress loading (HMIL) tests, the true triaxial strength of specimens shows no significant change with increasing vh,min, and the failure mode remains unchanged, resulting in tensile-shear failure characterized by layering and less fragmentation. A calculation method for elastic strain energy and dissipation energy applicable to different true triaxial stress loading-unloading conditions is proposed, revealing the characteristics of energy evolution. Furthermore, based on the Drucker-Prager criterion, the stress results under different loading-unloading conditions are compared with those under normal conditions, elucidating the variations in mechanical parameters of specimens and establishing the relationship between loading and unloading rates and strength reduction, thereby revealing the mechanism of strength reduction in true triaxial tests. This research provides guidance for deep underground engineering. |
| 资助项目 | National Natural Science Foundation of China[52174084] ; National Natural Science Foundation of China[U23B20146] ; National Natural Science Foundation of China[2024ZD1003901] ; Deep Earth Probe and Mineral Resources Exploration-National Science and Technology Major Project |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001476522100001 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35825]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Zetian |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Shenzhen Univ, Inst Deep Earth Sci & Green Energy, Coll Civil & Transportat Engn, Shenzhen 518060, Peoples R China 3.Sichuan Univ, Coll Water Resources & Hydropower, State Key Lab Intelligent Construct & Hlth Operat, Chengdu 610065, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Heng,Xie, Heping,Zhang, Ru,et al. Effect of True Triaxial Loading and Unloading Rates on the Mechanical Properties of Deep Rock[J]. ROCK MECHANICS AND ROCK ENGINEERING,2025:25. |
| APA | Gao, Heng.,Xie, Heping.,Zhang, Ru.,Zhang, Zetian.,Gao, Mingzhong.,...&Xie, Hongxin.(2025).Effect of True Triaxial Loading and Unloading Rates on the Mechanical Properties of Deep Rock.ROCK MECHANICS AND ROCK ENGINEERING,25. |
| MLA | Gao, Heng,et al."Effect of True Triaxial Loading and Unloading Rates on the Mechanical Properties of Deep Rock".ROCK MECHANICS AND ROCK ENGINEERING (2025):25. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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