Characterizing imbibition and void structure evolution in damaged rock salt under humidity cycling by low-field NMR
文献类型：期刊论文
| 作者 | Zeng, Zhen1,2,3; Ma, Hongling1,2,3; Yang, Chunhe1,2,3; Zhao, Kai1,2,3; Wang, Xuan1,2,3; Zheng, Zhuyan1,2,3 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2024 |
| 卷号 | 328页码:13 |
| 关键词 | Rock salt Humidity cycle Imbibition Self-healing Low-Field NMR |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2023.107371 |
| 英文摘要 | The excavation damaged zone (EDZ) of salt cavities for compressed air energy storage (CAES) undergoes daily humidity cycling. This study investigated moisture imbibition and its impact on void structures in differently damaged rock salt in a cyclic humidity environment using periodic low-field nuclear magnetic resonance (NMR) tests. NMR tests were also conducted on centrifuged and saturated specimens to assist with the analysis. Fluidaccessible voids in rock salts encompass mesovoids (2-50 nm) and macrovoids (>50 nm). In the wet stage of the first cycle, imbibition in the mesovoids lagged behind that in the macrovoids, whereas dehydration in the mesovoids was more pronounced and rapid in the subsequent dry stage than in the macrovoids. Throughout the long-term treatment, imbibition persisted, and the macrovoid volume in all three specimens notably decreased, whereas those of the mesovoids slightly increased. Collectively, these effects significantly reduced the fluidaccessible porosity. In our interpretation, the greater viscous force in the mesovoids impeded their imbibition and brine supplementation, resulting in a difference in the tests of the first cycle. The continuous imbibition of brine activated two self-healing mechanisms in the macrovoids: diffusion mass transfer and recrystallization. These mechanisms transformed consecutive macrocracks into isolated voids filled with recrystallized microstructures, effectively transforming macrovoids into mesovoids. In summary, this study characterized the complex imbibition and void structure evolution affected by self-healing mechanisms of rock salt under humidity cycling, offering new insights for evaluating the long-term stability and integrity of CAES salt cavities. |
| 资助项目 | National Natural Science Foundation of China[51874273] ; National Natural Science Foundation of China[51874274] ; National Science Foundation for Excellent Young Scholars[52122403] ; Youth Innovation Promotion Association CAS[2019324] ; Special Fund for Strategic Pilot Technology of Chinese Academy of Sciences[XDPB21] ; Major Research Development Program of Hubei province[2022BAA093] ; Major Research Development Program of Jiangxi province[2023ACG01004] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001146328900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40493]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Ma, Hongling; Zhao, Kai |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Zhen,Ma, Hongling,Yang, Chunhe,et al. Characterizing imbibition and void structure evolution in damaged rock salt under humidity cycling by low-field NMR[J]. ENGINEERING GEOLOGY,2024,328:13. |
| APA | Zeng, Zhen,Ma, Hongling,Yang, Chunhe,Zhao, Kai,Wang, Xuan,&Zheng, Zhuyan.(2024).Characterizing imbibition and void structure evolution in damaged rock salt under humidity cycling by low-field NMR.ENGINEERING GEOLOGY,328,13. |
| MLA | Zeng, Zhen,et al."Characterizing imbibition and void structure evolution in damaged rock salt under humidity cycling by low-field NMR".ENGINEERING GEOLOGY 328(2024):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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