Evaluation Method of Rock Brittleness under True Triaxial Stress States Based on Pre-peak Deformation Characteristic and Post-peak Energy Evolution
文献类型：期刊论文
| 作者 | Zhang, Yan1; Feng, Xia-Ting1 ; Yang, Chengxiang1; Han, Qiang1; Wang, Zhaofeng2; Kong, Rui1
|
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2021-01-05 |
| 页码 | 15 |
| 关键词 | Brittleness Strain energy Rupture energy True triaxial stress |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-020-02330-w |
| 英文摘要 | Deep rock masses are in true triaxial stress (TTS) fields, and few studies have examined the brittleness evaluation of rock under TTS thus far. In particular, research has not been conducted on the brittleness evaluation index and the effect of TTS. Therefore, based on a summary and analysis of pre-existing brittleness indexes, this paper proposes a brittleness index of rock under TTS that considers both stress-induced anisotropy and energy conversion characteristics during Class I behavior and Class II behavior. Meanwhile, the studied brittleness index is analyzed and verified. The brittleness of rock was found to increase with increasing sigma(2) while sigma(3) is constant; when sigma(2) is constant, the rock brittleness decreases with the increase in sigma(3). When sigma(3) is high, the increase in the rock brittleness amplitude with increasing sigma(2) is large; conversely, when sigma(3) is low, the amplitude is small. For the same sigma(3) (sigma(3) = 5 MPa), the order of brittleness of the three rocks is basalt > granite > marble. Finally, this paper shows that the proposed brittleness index can be applied to conventional triaxial and uniaxial stresses. In addition, under different TTS, a brittleness threshold of sigma(2)/sigma(3) = 5 was found for the rocks, and when sigma(2)/sigma(3) < 5, the rock brittleness enters a stress sensitive zone. The research results in this study can provide a relevant basis and guidance for the study of the brittle fracture process and the brittleness of rock under TTS. |
| 资助项目 | National Natural Science Foundation of China[51839003] ; National Natural Science Foundation of China[51621006] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000605111300004 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25451]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Feng, Xia-Ting |
| 作者单位 | 1.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yan,Feng, Xia-Ting,Yang, Chengxiang,et al. Evaluation Method of Rock Brittleness under True Triaxial Stress States Based on Pre-peak Deformation Characteristic and Post-peak Energy Evolution[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021:15. |
| APA | Zhang, Yan,Feng, Xia-Ting,Yang, Chengxiang,Han, Qiang,Wang, Zhaofeng,&Kong, Rui.(2021).Evaluation Method of Rock Brittleness under True Triaxial Stress States Based on Pre-peak Deformation Characteristic and Post-peak Energy Evolution.ROCK MECHANICS AND ROCK ENGINEERING,15. |
| MLA | Zhang, Yan,et al."Evaluation Method of Rock Brittleness under True Triaxial Stress States Based on Pre-peak Deformation Characteristic and Post-peak Energy Evolution".ROCK MECHANICS AND ROCK ENGINEERING (2021):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。