期刊
ENGINEERING GEOLOGY
卷 179, 期 -, 页码 24-31出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2014.06.019
关键词
Rock fracture; Unsaturated seepage flow; Capillary pressure; Shear deformation; Relative hydraulic conductivity
资金
- National Natural Science Foundation of China [51179136, 51222903]
- National Basic Research Program of China [2011CB013503]
This study presents a methodology for estimating the unsaturated hydraulic properties of rock fractures under deformation conditions. The surface morphology of an artificial granite rock fracture was examined using a high-resolution three-dimensional laser scanner, and the aperture distribution of the fracture was found to follow a Gaussian distribution. By virtue of the aperture distribution function and applying the Young-Laplace equation to local apertures, a novel model was presented to predict the capillary pressure-saturation relationship and the relative hydraulic conductivity of rough-walled rock fractures subjected to normal and shear loading. The proposed model was partially validated against existing laboratory data on the unsaturated hydraulic properties of rock fractures, and can be readily applied to various engineering practices such as transport phenomena in fractures, landslide mitigation, or underground oil storage. (C) 2014 Elsevier B.V. All rights reserved.
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