A mesh mapping method for simulating stress-dependent permeability of three-dimensional discrete fracture networks in rocks

Guowei Ma, Yang Wang, Tuo Li, Yun Chen

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A mesh mapping method is proposed to incorporate stress effect into the hydraulic analysis for highly fractured rock masses. Mechanical and hydraulic mesh are introduced for the hydraulic and mechanical simulations, respectively. The mechanical mesh contains strong discontinuities for capturing the fracture opening, closure and shearing, while the hydraulic mesh only consists of merged triangles on fractures. Using finite element method and unified pipe network method, stress effects on the equivalent permeability of complex discrete fracture networks (DFNs) are studied. The numerical result demonstrates that the mesh mapping method is effective to the stress-dependent analysis of 3D complicated DFNs.

Original languageEnglish
Pages (from-to)95-106
Number of pages12
JournalComputers and Geotechnics
Volume108
DOIs
Publication statusPublished - 1 Apr 2019

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mapping method
fracture network
Rocks
Hydraulics
permeability
hydraulics
rock
Shearing
finite element method
discontinuity
pipe
Pipe
Finite element method
simulation
effect
analysis

Cite this

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title = "A mesh mapping method for simulating stress-dependent permeability of three-dimensional discrete fracture networks in rocks",
abstract = "A mesh mapping method is proposed to incorporate stress effect into the hydraulic analysis for highly fractured rock masses. Mechanical and hydraulic mesh are introduced for the hydraulic and mechanical simulations, respectively. The mechanical mesh contains strong discontinuities for capturing the fracture opening, closure and shearing, while the hydraulic mesh only consists of merged triangles on fractures. Using finite element method and unified pipe network method, stress effects on the equivalent permeability of complex discrete fracture networks (DFNs) are studied. The numerical result demonstrates that the mesh mapping method is effective to the stress-dependent analysis of 3D complicated DFNs.",
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A mesh mapping method for simulating stress-dependent permeability of three-dimensional discrete fracture networks in rocks. / Ma, Guowei; Wang, Yang; Li, Tuo; Chen, Yun.

In: Computers and Geotechnics, Vol. 108, 01.04.2019, p. 95-106.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A mesh mapping method for simulating stress-dependent permeability of three-dimensional discrete fracture networks in rocks

AU - Ma, Guowei

AU - Wang, Yang

AU - Li, Tuo

AU - Chen, Yun

PY - 2019/4/1

Y1 - 2019/4/1

N2 - A mesh mapping method is proposed to incorporate stress effect into the hydraulic analysis for highly fractured rock masses. Mechanical and hydraulic mesh are introduced for the hydraulic and mechanical simulations, respectively. The mechanical mesh contains strong discontinuities for capturing the fracture opening, closure and shearing, while the hydraulic mesh only consists of merged triangles on fractures. Using finite element method and unified pipe network method, stress effects on the equivalent permeability of complex discrete fracture networks (DFNs) are studied. The numerical result demonstrates that the mesh mapping method is effective to the stress-dependent analysis of 3D complicated DFNs.

AB - A mesh mapping method is proposed to incorporate stress effect into the hydraulic analysis for highly fractured rock masses. Mechanical and hydraulic mesh are introduced for the hydraulic and mechanical simulations, respectively. The mechanical mesh contains strong discontinuities for capturing the fracture opening, closure and shearing, while the hydraulic mesh only consists of merged triangles on fractures. Using finite element method and unified pipe network method, stress effects on the equivalent permeability of complex discrete fracture networks (DFNs) are studied. The numerical result demonstrates that the mesh mapping method is effective to the stress-dependent analysis of 3D complicated DFNs.

KW - Equivalent permeability

KW - Finite element method (FEM)

KW - Strong discontinuities

KW - Three-dimensional discrete fracture networks (DFNs)

KW - Unified pipe-network method (UPM)

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