Acoustic emission insights into rock salt damage under humidity cycling
文献类型：期刊论文
| 作者 | Zeng, Zhen3,4,5; Ma, Hongling3,4,5; Li, Yinping3,4,5; Li, Hang2; Wang, Xuan3,4,5; Liu, Fahui1; Zhao, Kai3,4,5 |
| 刊名 | GEOENERGY SCIENCE AND ENGINEERING
 |
| 出版日期 | 2025-08-01 |
| 卷号 | 251页码:14 |
| 关键词 | Rock salt Acoustic emission Humidity cycling Mesostructure Damage mechanism |
| ISSN号 | 2949-8929 |
| DOI | 10.1016/j.geoen.2025.213898 |
| 英文摘要 | Salt caverns used as compressed air energy storage (CAES) reservoirs undergo humidity cycling during operation, introducing moisture in the surrounding rock salt's cracks and influencing its mechanical properties. This study quantitatively examines the evolution of mesoscale (2-50 nm) structures and damage mechanisms associated with this effect. Acoustic emission (AE) was monitored during uniaxial compression tests on pre-damaged rock salt specimens subjected to humidity cycling. Real-time AE characteristics, such as count density, frequency, and amplitude, were utilized to identify sound sources within the rock, facilitating the analysis of the distribution and evolution of the associated structural damage throughout the macroscopic compression. The findings indicate that humidity cycling weakens the Felicity effect in damaged rock salt, with AE event counts decreasing by 59.2 % while the outbreak of AE was significantly delayed. AE signal frequency and amplitude progressively decreased, indicating a transition from high-energy transgranular cracking to lower-intensity damage such as intergranular cracking and void closure. RA-AF analysis revealed an increase in tensile crack proportion from 44.39 % to 59.11 %. Combined with mesoscale observation, self-healing effects in damaged rock salt were confirmed, and the relationship between the mesoscale damage mechanisms and macroscopic mechanical responses of rock salt under humidity cycling was elucidated. Recrystallized salt structures bridged the cracks, mitigating stress concentration at crack tips and suppressing secondary crack propagation. These structures facilitated releasing strain energy in small increments during the later loading stage, delaying high-energy fracture events. Additionally, brine inclusion within cracks reduced intergranular damage and enhanced rock deformation. Consequently, humidity cycling improves the compressive strength and ductility of damaged rock salt. These insights facilitate predictions of the mechanical properties of rocks surrounding CAES salt caverns, enabling a more accurate assessment of reservoirs' geological safety under long-term operation. |
| 资助项目 | Major Research Development Program of Hubei province[2022BAA093] ; Major Research Development Program of Hubei province[2022BAD163] ; Major Research Development Program of Jiangxi province[2023ACG01004] ; Technical Research Projects of China Petrochemical Corporation[P23195] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME023008] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001470046900001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35697]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Ma, Hongling |
| 作者单位 | 1.China Univ Petr, Coll Pipeline & Civil Engn, Qingdao 266580, Shandong, Peoples R China 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.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 | Zeng, Zhen,Ma, Hongling,Li, Yinping,et al. Acoustic emission insights into rock salt damage under humidity cycling[J]. GEOENERGY SCIENCE AND ENGINEERING,2025,251:14. |
| APA | Zeng, Zhen.,Ma, Hongling.,Li, Yinping.,Li, Hang.,Wang, Xuan.,...&Zhao, Kai.(2025).Acoustic emission insights into rock salt damage under humidity cycling.GEOENERGY SCIENCE AND ENGINEERING,251,14. |
| MLA | Zeng, Zhen,et al."Acoustic emission insights into rock salt damage under humidity cycling".GEOENERGY SCIENCE AND ENGINEERING 251(2025):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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