气候变化领域集成服务门户(CCPortal): Migration mechanism of fine particles in aquifer during water injection

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DOI	10.1007/s11069-020-03947-4
	Migration mechanism of fine particles in aquifer during water injection
	Du M.; Gong B.; Xu Y.; Zhao Z.; Zhang L.
发表日期	2020
ISSN	0921030X
起始页码	1095
结束页码	1116
卷号	102 期号:3
英文摘要	Water injection in aquifers to stabilize water level is a novel method to prevent shaft failure. However, with the progression of water injection, the flow rate of water injection decreases gradually. Through analysis, it is considered that the fine particles in sand migrate to form a dense structure, which hinders the increase of water flow. In order to investigate the migration mechanism of fine particles in the aquifer during water injection, experimental tests and numerical simulations were conducted in the present study. First, the physical experiment was designed, and it was shown that the water pressure difference between the two pressure gauges gradually decreased, while the water flow rate per hour slowly decreased. Furthermore, the permeability coefficient of sand near the outlet became smaller and smaller with the migration of fine particles, which indicated that the fine particles among sand grains migrated gradually from the water injection inlet to the outlet. Additionally, the water flow channels formed slowly. Then, the microscopic mechanism of fine particle migration was studied using particle flow code numerical simulation. During water injection, water pressure and porosity of sand decreased from the water injection inlet to the outlet, while the coordination number of particles increased on the whole. Contact force chain gradually strengthened near the outlet side during water injection. The trends of force chain distribution, the coordination number distributions and the evolution of porosity were consistent, which highlighted the process of fine particles migrating from the injection inlet to the outlet in the aquifer. © 2020, Springer Nature B.V.
关键词	Aquifer Particle migration Seepage Shaft failure Water injection
英文关键词	aquifer; channel flow; flow velocity; fluid injection; gauge; numerical method; permeability; porosity; testing method; trend analysis; water flow
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205675
作者单位	Mine Safety Technology Branch, China Coal Research Institute, Beijing, 100013, China; State Key Lab of Coal Resource High Efficient Mining and Clean Utilization (China Coal Research Institute), Beijing, 100013, China; Liaoning Technical University, Fuxin, 123000, China; Graduate School of Engineering, Nagasaki University, Nagasaki, 852-8521, Japan; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China; School of Energy and Mining Engineering, China University of Mining and Technology, Beijing, 100083, China
推荐引用方式 GB/T 7714	Du M.,Gong B.,Xu Y.,et al. Migration mechanism of fine particles in aquifer during water injection[J],2020,102(3).
APA	Du M.,Gong B.,Xu Y.,Zhao Z.,&Zhang L..(2020).Migration mechanism of fine particles in aquifer during water injection.Natural Hazards,102(3).
MLA	Du M.,et al."Migration mechanism of fine particles in aquifer during water injection".Natural Hazards 102.3(2020).