The mechanical behavior of rock salt under different confining pressure unloading rates during compressed air energy storage (CAES)

doi:10.1016/j.petrol.2020.107676

	The mechanical behavior of rock salt under different confining pressure unloading rates during compressed air energy storage (CAES)
	Han, Yue 1; Ma, Hongling 2; Yang, Chunhe 1,2; Li, Huan 2; Yang, Jie 1
刊名	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2021
卷号	196 页码:8
关键词	Confining pressure unloading test Unloading rate Mechanical behavior Failure CAES
ISSN号	0920-4105
DOI	10.1016/j.petrol.2020.107676
英文摘要	Compressed air energy storage (CAES) is a promising energy conversion storage technology and underground salt caverns are recognized as the appropriate storage places for it. The reduction of air during the withdrawal periods leads to the surrounding rock being unloaded, which threatens the stability of the salt cavern. To investigate the mechanical behavior of surrounding rock under different unloading rates, the confining pressure unloading tests in six unloading rates have been conducted on rock salt. Results show the rock salt undergoes volume expansion at the beginning of unloading due to the reduction of elastic compression strain. The volume strain expands rapidly beyond a threshold, i.e. accelerated strain point. The stresses at failure point and accelerated strain point show that a low unloading rate is beneficial to enhance rock strength. Nevertheless, larger inelastic strain appears in a lower unloading rate. The effect of the unloading rate on rock salt failure mode is that rapid unloading will promote crack growth. Moreover, the relationship between the unloading rate of surrounding rock and the air withdrawal rate is established. The outcome derived from the research can provide some instruction and inspiration for air withdrawal rate design in CAES.
资助项目	National Natural Science Foundation of China[5187041724]
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000600808100048
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25519]
专题	中科院武汉岩土力学所
通讯作者	Han, Yue; Ma, Hongling
作者单位	1.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, 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	Han, Yue,Ma, Hongling,Yang, Chunhe,et al. The mechanical behavior of rock salt under different confining pressure unloading rates during compressed air energy storage (CAES)[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2021,196:8.
APA	Han, Yue,Ma, Hongling,Yang, Chunhe,Li, Huan,&Yang, Jie.(2021).The mechanical behavior of rock salt under different confining pressure unloading rates during compressed air energy storage (CAES).JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,196,8.
MLA	Han, Yue,et al."The mechanical behavior of rock salt under different confining pressure unloading rates during compressed air energy storage (CAES)".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 196(2021):8.