X-ray Insights into Fluid Flow During Rock Failures: Nonlinear Modeling of Fluid Flow Through Fractures with Varied Roughness

Author:

Sun HuanORCID,Long Qijian,Ye ZhenniORCID,Liu Hao,Meng Zimin

Abstract

AbstractFluid flow and evolution mechanisms in fractured rocks are fundamental tasks in engineering fields such as geohazards prediction, geothermal resource exploitation, oil and gas exploitation, and geological sequestration of carbon dioxide. This study employed an enhanced X-ray imaging digital radiography to investigate nonlinear flow model of fluid through different roughness fractures. The X-ray images of fluid flow during rock failure were analyzed using a multi-threshold segmentation method applied to the X-ray absorption dose. The result show that a proposed nonlinear flow equation considers the joint roughness coefficient and the uniaxial compressive strength of the jointed rock, enabling a better understanding of the nonlinear flow behavior in fractured rock masses. This modeling approach has important theoretical and practical implications. By accounting for key factors influencing fluid flow behavior, it can help guide monitoring efforts to support early warning of fractured rock mass instability. Additionally, a more mechanistic understanding of flow processes may inform strategies to prevent engineering geological hazards.

Funder

National Natural Science Foundation of China

Hainan Province Science and Technology Special Fund

Hainan Provincial Natural Science Foundation of China

Research Project of Collaborative Innovation Center of Hainan University of China

Open Research Fund Program of State key Laboratory of Hydroscience and Engineering

Publisher

Springer Science and Business Media LLC

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