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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