中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Impact of fracture normal and shear stiffnesses on the scattering attenuation of P and S waves in a naturally fractured rock

文献类型:期刊论文

作者Lei, Qinghua1,2,3
刊名JOURNAL OF APPLIED GEOPHYSICS
出版日期2022-11-01
卷号206期号:-页码:-
关键词Natural fracture network Fracture stiffness Elastic waves Scattering Inverse quality factor Anderson localisation
ISSN号0926-9851
英文摘要In this paper, numerical simulations are conducted to study elastic wave transport, scattering, and attenuation in a naturally fractured rock associated with length-correlated fracture normal and shear stiffnesses. The model represents the pattern of a real fracture outcrop in an explicit fashion based on the discrete fracture network approach and computes the dynamical interaction between waves and fractures based on the displacement discontinuity method. A broad spectrum of geologically relevant fracture stiffness values are explored to analyse the impact of fracture normal and shear stiffness components on the wavefield evolution. It is observed that when the fracture normal and shear stiffnesses are both high, the wavefield is a propagative mode dominated by a forward ballistic transport. With the reduction of fracture normal and/or shear stiffnesses, the wavefield becomes diffusive characterised by the emergence and dominance of coda waves. If the fracture stiffnesses are very low, waves become trapped entering the so-called localisation regime associated with an absence of effective transport as well as a profound attenuation. Our results show that the scattering attenuation of S waves tends to be greater than that of P waves in the propagation and diffusion regimes, but becomes similar in the localisation regime. The research findings of this paper have important implications for understanding and predicting the seismic wave attenuation behaviour in naturally fractured rocks for various geophysical applications.
学科主题Geology ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000858994100003
出版者ELSEVIER
源URL[http://119.78.100.198/handle/2S6PX9GI/35323]  
专题中科院武汉岩土力学所
作者单位1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
2.Department of Earth Sciences, Uppsala University, Uppsala 752 36, Sweden
3.Department of Earth Sciences, ETH Zürich, Zürich 8092, Switzerland
推荐引用方式
GB/T 7714
Lei, Qinghua. Impact of fracture normal and shear stiffnesses on the scattering attenuation of P and S waves in a naturally fractured rock[J]. JOURNAL OF APPLIED GEOPHYSICS,2022,206(-):-.
APA Lei, Qinghua.(2022).Impact of fracture normal and shear stiffnesses on the scattering attenuation of P and S waves in a naturally fractured rock.JOURNAL OF APPLIED GEOPHYSICS,206(-),-.
MLA Lei, Qinghua."Impact of fracture normal and shear stiffnesses on the scattering attenuation of P and S waves in a naturally fractured rock".JOURNAL OF APPLIED GEOPHYSICS 206.-(2022):-.

入库方式: OAI收割

来源:武汉岩土力学研究所

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