인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
The fractal topography of fracture surfaces challenges the upscaling of laboratory test results to the field scale, therefore the study of rock masses often requires numerical experimentation. We generate digital fracture analogues and model invasion percolation to investigate the capillarity-saturation P<sub>c</sub>-S<sub>w</sub> fracture response to changes in boundary conditions. Results show that aperture is Gaussian-distributed and the coefficient of variation is scale-independent. The aperture contraction during normal stress increments causes higher capillary pressures and steeper P<sub>c</sub>-S<sub>w</sub> curves, while shear displacement results in invasion anisotropy. The three-parameter van Genutchen model adequately fits the fracture capillary response in all cases; the capillary entry value decreases with fracture size, yet the fracture P<sub>c</sub>-S<sub>w</sub> curve normalized by the entry value is size-independent. Finally, we combine the fracture and matrix response to infer the rock mass response. Fracture spacing, aperture statistics and matrix porosity determine the rock mass capillarity-saturation P<sub>c</sub>-S<sub>w</sub> curve. Fractures without gouge control the entry pressure whereas the matrix regulates the residual saturation at high capillary pressure P<sub>c</sub>.
#Saturation (graph theory)
#Rock mass classification
#Capillary pressure
#Geology
#Materials science
#Geotechnical engineering
#Anisotropy
#Fracture (geology)
#Mechanics
#Matrix (chemical analysis)
#Conservation of mass
#Mineralogy
#Composite material
#Porous medium
#Porosity
#Mathematics
#Optics
#Physics
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