An XFEM-based hydro-mechanical model to consider the non-Darcy flow in complex fracture networks
文献类型：期刊论文
| 作者 | Zhou, Yun2,3; Yang, Diansen1; Sui, Qun2,3,4; Chen, Weizhong2,3 |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 170页码:15 |
| 关键词 | XFEM Hydro-mechanical coupling Non-Darcy flow Complex fracture network |
| ISSN号 | 1365-1609 |
| DOI | 10.1016/j.ijrmms.2023.105517 |
| 英文摘要 | Geotechnical instability and failure are closely related to the hydro-mechanical coupled behavior of fractured rocks, and the existing studies often regard the fracture seepage as linear Darcy flow. Due to the neglect of nonDarcy effect caused by rough rock wall and high flow velocity, the estimated rock deformation and seepage flow can lead to incorrect assessment of geotechnical risks. Hence, this study proposed an efficient and robust hydromechanical (HM) coupled model to consider non-Darcy flow in complex fracture networks. The fractured rock mass's mechanical response, including the fracture surface's frictional contact, was calculated using the XFEM solver, and the widely used Forchheimer's law was adopted to describe the non-Darcy flow along the fractures. The fracture segments cut by mechanical element edges are considered one-dimensional flow elements, and the Newton-Raphson iteration method is adopted to solve the Forchheimer equation directly. To consider the influence of fracture deformation on the conductivity of fractures, the Barton-Bandis model was adopted to determine the hydraulic aperture of the fractures when the fracture was closed. Subsequently, a staggering Newton-Raphson method can be developed to decouple the fracture deformation and fluid flow process. Experimental results were adopted to validate the accuracy of the numerical model, and several numerical cases were used to illustrate the efficiency and robustness of the proposed model. The effects of inlet pressure, confining stress, and non-Darcy effect on the HM-coupled behavior of fractured rock were investigated. Numerical results suggested that the distribution of fluid pressure and failure process of rock mass based on Darcy assumption could be dramatically changed after considering the nonlinear seepage behavior. |
| 资助项目 | National Natural Science Foundation of China[12202463] ; National Natural Science Foundation of China[U22A20595] ; National Natural Science Foundation of China[52179113] ; National Natural Science Foundation of China[52179116] ; National Natural Science Foundation of China[51991392] ; National Key Research and Development Program of China[2021YFC3100800] ; Key Deployment Projects of Chinese Academy of Sciences[ZDRW-ZS-2021-3] |
| WOS研究方向 | Engineering ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001050215400001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39213]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yang, Diansen |
| 作者单位 | 1.Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Changjiang Design Grp Co Ltd, Wuhan 430010, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Yun,Yang, Diansen,Sui, Qun,et al. An XFEM-based hydro-mechanical model to consider the non-Darcy flow in complex fracture networks[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2023,170:15. |
| APA | Zhou, Yun,Yang, Diansen,Sui, Qun,&Chen, Weizhong.(2023).An XFEM-based hydro-mechanical model to consider the non-Darcy flow in complex fracture networks.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,170,15. |
| MLA | Zhou, Yun,et al."An XFEM-based hydro-mechanical model to consider the non-Darcy flow in complex fracture networks".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 170(2023):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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