Influence of initial stresses and unloading rates on the deformation and failure mechanism of Jinping marble under true triaxial compression
文献类型：期刊论文
| 作者 | Xu, Hong; Feng, Xia-Ting ; Yang, Chengxiang; Zhang, Xiwei; Zhou, Yangyi; Wang, Zhaofeng
|
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2019 |
| 卷号 | 117期号:-页码:90-104 |
| 关键词 | True triaxial compression test Initial stresses Unloading rate Deformation process Failure mechanism |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2019.03.013 |
| 英文摘要 | To investigate the deformation and failure mechanism of rock influenced by initial stress and unloading rates, this study presents minimum principal stress unloading tests of Jinping marble under true triaxial compression conditions under various initial stresses and unloading rates based on the in situ stresses measured in the China Jinping Underground Laboratory Phase II (CJPL-II). The effects of initial stresses and unloading rates on the bearing capacity and the deformation and failure characteristics of Jinping marble were analysed. The relationship between the strains in the three principal stress directions and the unloading extent of sigma(3) is defined using parameters such as the strain-unloading extent ratio and the unloading strain rate. With an increase in the initial sigma(1), the increase in strain-unloading extent ratio and unloading strain rate changed from linear to exponential earlier, and sample failure occurred with a smaller unloading extent. Meanwhile, the number of acoustic emission rings and the amount of cumulative energy increased, and the sample failure changed from tensile failure to a mixture of tensile and shear failure that showed more transgranular cracks in the microscopic images. With an increase in the initial sigma(2) or sigma(3), the overall trend of the failure characteristics was similar to that with an increase in the initial sigma(1), but the sample failed with a larger unloading extent, and the increase in strain-unloading extent ratio and unloading strain rate changed from linear to exponential later. The influence of unloading strain rate shows that as unloading strain rate increased, the sample failed with a larger unloading extent and changed from a mixture of tensile and shear to tensile failure, and more transgranular cracks were observed in the microscopic images. |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000469934600008 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14982]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Hong,Feng, Xia-Ting,Yang, Chengxiang,et al. Influence of initial stresses and unloading rates on the deformation and failure mechanism of Jinping marble under true triaxial compression[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2019,117(-):90-104. |
| APA | Xu, Hong,Feng, Xia-Ting,Yang, Chengxiang,Zhang, Xiwei,Zhou, Yangyi,&Wang, Zhaofeng.(2019).Influence of initial stresses and unloading rates on the deformation and failure mechanism of Jinping marble under true triaxial compression.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,117(-),90-104. |
| MLA | Xu, Hong,et al."Influence of initial stresses and unloading rates on the deformation and failure mechanism of Jinping marble under true triaxial compression".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 117.-(2019):90-104. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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