The effect of pegmatite veins on fracture behaviors of granite in a deep large underground cavern
文献类型：期刊论文
| 作者 | Xia, Yuelin3; Xu, Ding-Ping2; Jiang, Quan2; Xie, Jianbin3; Li, Zhiguo1 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 83期号:11页码:21 |
| 关键词 | High stress Veined granite Spalling True triaxial testing Shuangjiangkou underground powerhouse |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-024-03989-z |
| 英文摘要 | The fracture behavior of granite with pegmatite veins, which influences brittle spalling at the Shuangjiangkou Hydropower Station's underground powerhouse in China, was investigated. This study explored the fracture characteristics of veined granite through three approaches: an in-situ geological survey, true triaxial compression experiments, and microscopic fracture analysis. The results revealed that pegmatite veins, due to their high brittleness, are prone to spalling and often serve as boundaries for rock mass instability. Under true triaxial compression, the stress-strain curve of granite shifted from Class I to Class II in the presence of veins, with thicker veins resulting in lower overall granite strength. In granite with gently dipping veins, deflection of the main fracture at the vein-granite interface was observed, while steeply dipping veins led to fracture propagation either within the veins or along the lithologic interface. Factors influencing the fractures included differences in elastic modulus and Poisson's ratio between the veins and granite near the lithological interface, as well as mineral composition and structural characteristics. A greater aggregation of shear fracture signals was observed in specimens with thicker veins before reaching the damage stress threshold. Stress-relieving measures are necessary to reduce stress concentration near veined rock masses, and microseismic techniques are recommended for monitoring shear fractures to provide timely warnings of rock mass instability when excavating granite with steep and thick veins in a deep underground cavern. |
| 资助项目 | National Natural Science Foundation of China[52279117] ; National Natural Science Foundation of China[52325905] ; National Natural Science Foundation of China[DJ-HXGG-2023-04] ; Public Bidding and Leadership Project of Power China[SKLGME-JBGS2401] ; Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001345446100002 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42936]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xu, Ding-Ping |
| 作者单位 | 1.POWERCHINA Chengdu Engn Corp Ltd, Chengdu 610072, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Yunnan Univ, Sch Architecture & Planning, Kunming 650500, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Yuelin,Xu, Ding-Ping,Jiang, Quan,et al. The effect of pegmatite veins on fracture behaviors of granite in a deep large underground cavern[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2024,83(11):21. |
| APA | Xia, Yuelin,Xu, Ding-Ping,Jiang, Quan,Xie, Jianbin,&Li, Zhiguo.(2024).The effect of pegmatite veins on fracture behaviors of granite in a deep large underground cavern.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(11),21. |
| MLA | Xia, Yuelin,et al."The effect of pegmatite veins on fracture behaviors of granite in a deep large underground cavern".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.11(2024):21. |
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。