Effective Elastic and Hydraulic Properties of Fractured Rock Masses with High Contrast of Permeability: Numerical Calculation by an Embedded Fracture Continuum Approach

Autor: Dashnor Hoxha, Hong-Lam Dang, Duc-Phi Do
Přispěvatelé: University of Transport and Communications [Hanoi] (UTC), Génie Civil (GC), Laboratoire de Mécanique Gabriel Lamé (LaMé), Université d'Orléans (UO)-Université de Tours-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université d'Orléans (UO)-Université de Tours-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)
Rok vydání: 2019
Předmět:
Article Subject
0211 other engineering and technologies
02 engineering and technology
010502 geochemistry & geophysics
01 natural sciences
law.invention
Moduli
[SPI]Engineering Sciences [physics]
law
[SPI.GCIV.RISQ]Engineering Sciences [physics]/Civil Engineering/Risques
Polygon mesh
Cartesian coordinate system
ComputingMilieux_MISCELLANEOUS
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Civil and Structural Engineering
[SPI.GCIV.CD]Engineering Sciences [physics]/Civil Engineering/Construction durable
Continuum (measurement)
Computer simulation
[SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique
Mechanics
Permeability (earth sciences)
lcsh:TA1-2040
[SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures
[SPI.GCIV.MAT]Engineering Sciences [physics]/Civil Engineering/Matériaux composites et construction
lcsh:Engineering (General). Civil engineering (General)
Porous medium
Relative permeability
Geology
Zdroj: Advances in Civil Engineering, Vol 2019 (2019)
Advances in Civil Engineering
Advances in Civil Engineering, Hindawi Publishing Corporation, 2019, 2019, pp.1-21. ⟨10.1155/2019/7560724⟩
ISSN: 1687-8094
1687-8086
DOI: 10.1155/2019/7560724
Popis: In this work, the hydromechanical modeling of the fractured rock masses was conducted based on a new numerical simulation method named as embedded fracture continuum (EFC) approach. As the principal advantage, this approach allows to simplify the meshing procedure by using the simple Cartesian meshes to model the fractures that can be explicitly introduced in the porous medium based on the notion of fracture cells. These last elements represent the grid cells intersected by at least one fracture in the medium. Each fracture cell in the EFC approach present a continuum porous medium whose hydromechanical properties are calculated from ones of the matrix and ones of the intersected fractures, thanks for using the well-known solution of the joint model. The determination of the hydromechanical properties of the fracture cells as presented in this work allows to provide the theoretical base and to complete some simple approximations introduced in the literature. Through different verification tests, the capability of the developed EFC approach to model the hydromechanical behavior of fractured rock was highlighted. An analysis of different parameters notably the influence of the fracture cell size on the precision of the proposed approach was also conducted. This novel approach was then applied to investigate the effective permeability and elastic compliance tensor of a fractured rock masses taken from a real field, the Sellafield site. The comparison of the results calculated from this approach with ones conducted in the literature based on the distinct element code (UDEC) presents a good agreement. However, unlike the previous studies using UDEC, which limits only in the case of fractured rock masses without dead-end fractures, our approach allows accounting for this kind of fractures in the medium. The numerical simulations show that the dead-end fractures could have a considerable contribution on the effective compliance moduli, while their effect can be neglected to calculate the overall permeability of the of fractured rock masses.
Databáze: OpenAIRE
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