DOI: 10.1002/grl.50436
论文题名: Linking permeability to crack density evolution in thermally stressed rocks under cyclic loading
作者: Faoro I. ; Vinciguerra S. ; Marone C. ; Elsworth D. ; Schubnel A.
刊名: Geophysical Research Letters
ISSN: 0094-8986
EISSN: 1944-8717
出版年: 2013
卷: 40, 期: 11 起始页码: 2590
结束页码: 2595
语种: 英语
英文关键词: crack connectivity
; deformability
; rock physics
; thermal cracking
; transport properties
Scopus关键词: Circulating fluids
; Complex-coupling
; Deviatoric stress
; Differential stress
; Evolution of cracks
; Flow-through tests
; Rock physics
; Thermal cracking
; Basalt
; Cracking (chemical)
; Deformation
; Electron transport properties
; Formability
; Granite
; Transport properties
; Cracks
; basalt
; crack propagation
; cyclic loading
; deformation
; granite
; microfacies
; permeability
; rock mechanics
; temperature effect
; water content
英文摘要: To improve our understanding of the complex coupling between circulating fluids and the development of crack damage, we performed flow-through tests on samples of Etna basalt and Westerly granite that were cyclically loaded by deviatoric stresses. The basalt was naturally microfractured, while the relatively crack-free Westerly granite was thermally pretreated to 500°C and 800°C to generate microcrack damage. Samples were repeatedly loaded and then unloaded under deviatoric stress paths and ultimately to failure. Permeability and water volume content were measured throughout the loading history together with the differential stress. Permeability decreases at low differential stresses and increases at intermediate differential stresses up to a steady value at failure. We use water volume content as a proxy for fluid storage and show that both permeability and storage evolve with damage and evolution of crack density. We use crack models to represent the evolution of permeability as a function of loading state and are able to independently link it to the observed evolution of deformability, used as an independent measure of crack density. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879898534&doi=10.1002%2fgrl.50436&partnerID=40&md5=534668d2c4c3aca85753c2ef0c24414c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6250
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Sciences, University of Durham, Durham, United Kingdom
Recommended Citation:
Faoro I.,Vinciguerra S.,Marone C.,et al. Linking permeability to crack density evolution in thermally stressed rocks under cyclic loading[J]. Geophysical Research Letters,2013-01-01,40(11).