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DOI | 10.1002/2018GL077548 |
Correlation Between Fracture Network Properties and Stress Variability in Geological Media | |
Lei, Qinghua1; Gao, Ke2 | |
2018-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:9页码:3994-4006 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Canada |
英文摘要 | We quantitatively investigate the stress variability in fractured geological media under tectonic stresses. The fracture systems studied include synthetic fracture networks following power law length scaling and natural fracture patterns based on outcrop mapping. The stress field is derived from a finite-discrete element model, and its variability is analyzed using a set of mathematical formulations that honor the tensorial nature of stress data. We show that local stress perturbation, quantified by the Euclidean distance of a local stress tensor to the mean stress tensor, has a positive, linear correlation with local fracture intensity, defined as the total fracture length per unit area within a local sampling window. We also evaluate the stress dispersion of the entire stress field using the effective variance, that is, a scalar-valued measure of the overall stress variability. The results show that a well-connected fracture system under a critically stressed state exhibits strong local and global stress variabilities. |
英文关键词 | fracture network fracture intensity connectivity tectonic stress stress variability critically stressed state |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434111700028 |
WOS关键词 | EARTHS CRUST ; FAULT ; CONNECTIVITY ; ROCK ; PATTERNS ; SYSTEMS ; STATE ; ORIENTATION ; TENSORS ; PROJECT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26765 |
专题 | 气候变化 |
作者单位 | 1.Imperial Coll London, Dept Earth Sci & Engn, London, England; 2.Univ Toronto, Dept Civil Engn, Toronto, ON, Canada |
推荐引用方式 GB/T 7714 | Lei, Qinghua,Gao, Ke. Correlation Between Fracture Network Properties and Stress Variability in Geological Media[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(9):3994-4006. |
APA | Lei, Qinghua,&Gao, Ke.(2018).Correlation Between Fracture Network Properties and Stress Variability in Geological Media.GEOPHYSICAL RESEARCH LETTERS,45(9),3994-4006. |
MLA | Lei, Qinghua,et al."Correlation Between Fracture Network Properties and Stress Variability in Geological Media".GEOPHYSICAL RESEARCH LETTERS 45.9(2018):3994-4006. |
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