Strength and Energy Evolution Law of Deep-Buried Granite Under Triaxial Conditions
文献类型：期刊论文
| 作者 | Guo, Guangtao; Xu, Dingping; Feng, Guangliang; Wu, Xiaogang; Zhou, Yuxin |
| 刊名 | FRONTIERS IN ENVIRONMENTAL SCIENCE
 |
| 出版日期 | 2022-07-13 |
| 卷号 | 10 |
| 关键词 | deep-buried granite deformation and failure characteristics strength parameters energy evolution energy consumption ratio |
| 英文摘要 | With the increasing global demand for clean and renewable energy sources, many underground hydropower caverns are built in deep mountain valleys in high-stress regions. The evolution of the mechanical properties of the surrounding rock of underground caverns under high-stress excavation requires urgent investigation. According to the deep-buried granite in the underground caverns of the Shuangjiangkou hydropower station, triaxial tests under confining pressures of 10, 30, 40, and 50 MPa were conducted by the MTS815 rock mechanics test system. Based on the stress-strain curve, the evolution law of the strength parameters of rock samples with the crack volume strain and energy with the energy consumption ratio under different confining pressures was analyzed. Our results showed that the stress-strain curve of the sample is divided into five stages with four characteristic points: the closed point, initiation point, volume expansion point, and peak point. The strength of each stage increases with an increase in the confining pressure. In addition, the failure of this granite is characterized by apparent shear failure. The internal friction angle and the cohesion increase rapidly with the increase in the crack volume strain, and they gradually tend to be constant. Furthermore, the confining pressure profoundly influences energy evolution during the loading in the stable and unstable crack growth stages. In these stages, total energy, dissipated energy, and elastic strain energy increase with an increase in the confining pressure. Finally, the energy consumption ratio can represent the preliminary criterion of rock failure in terms of energy. With the increase in the confining pressure, the energy consumption ratio of rock samples gradually increases to approximately 1.0 at the peak stress point. The research results can provide a reference for the instability prediction of surrounding rock masses of high-stress underground caverns. |
| 学科主题 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000832714300001 |
| 出版者 | FRONTIERS MEDIA SA |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34711]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Guo, Guangtao,Xu, Dingping,Feng, Guangliang,et al. Strength and Energy Evolution Law of Deep-Buried Granite Under Triaxial Conditions[J]. FRONTIERS IN ENVIRONMENTAL SCIENCE,2022,10. |
| APA | Guo, Guangtao,Xu, Dingping,Feng, Guangliang,Wu, Xiaogang,&Zhou, Yuxin.(2022).Strength and Energy Evolution Law of Deep-Buried Granite Under Triaxial Conditions.FRONTIERS IN ENVIRONMENTAL SCIENCE,10. |
| MLA | Guo, Guangtao,et al."Strength and Energy Evolution Law of Deep-Buried Granite Under Triaxial Conditions".FRONTIERS IN ENVIRONMENTAL SCIENCE 10(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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