ENERGY TRANSPORT IN A SINGLE ROCK FRACTURE

Grouting reinforcement was used to improve rock strength and avoid seepage in rock engineering. A self-developed visualised test platform was developed and the influences of different fracture openness on grouting diffusion modes were revealed; the Bingham rheological model was imported to simulate the grouting diffusion process in a single plate fracture, the spatio-temporal distribution of the velocity field under different obstructions was determined using the finite element method. The results indicate that: 1) The grout diffuses faster with the increase of fracture openness, while a stagnation effect of the grouting diffusion velocity behind the obstruction occurs. 2) Due to obstructions, the grouting diffusion process can be divided into four stages: circular diffusion, flat diffusion, vortex diffusion, and butterfly diffusion. 3) The grouting diffusion area is divided into a fully-reinforced zone and a semi-reinforced zone, and the area of the latter increases with the fracture openness, while being little affected by the size of any obstruction. 4) Furthermore, some new grouting diffusion laws were revealed considering the asymmetrical arrangement of obstructions. The results presented in this work will be helpful for describing and predicting the grouting process in fracture networks.

Download Full-text

Numerical Simulation of Solute Transport Instantaneously Injected in a Single Rock Fracture System: Inclusion of a Nonlinear Sorption Term

MRS Proceedings ◽

10.1557/proc-353-371 ◽

1994 ◽

Vol 353 ◽

Author(s):

Yoko Fujikawa ◽

M. Fukui

Keyword(s):

Numerical Simulation ◽

Solute Transport ◽

Nonlinear Term ◽

Transport Model ◽

Rock Fracture ◽

Porous Matrix ◽

Nonlinear Sorption ◽

The Laplace Transform ◽

Single Rock Fracture ◽

System Inclusion

AbstractThe effect of nonlinear Freundlich sorption isotherm on the transport of sorptive solute in a system of fracture and porous matrix was investigated through numerical simulation. To solve a set of partial differential equations of solute transport with nonlinear term, use of the Laplace transform Galerkin (LTG) technique was investigated. It was shown that the LTG method could be applied successfully to solve quasi-linearized transport equation. Sensitivity analysis showed that nonlinear sorption in porous matrix with order less than 1 increased the skewness of the breakthrough curve. The fitting of experimental effluent data using a transport model with nonlinear isotherms was also conducted.

Download Full-text

Quantitative evaluation of fracture geometry influence on nonlinear flow in a single rock fracture

Journal of Hydrology ◽

10.1016/j.jhydrol.2020.125162 ◽

2020 ◽

Vol 589 ◽

pp. 125162

Author(s):

Guan Rong ◽

Jie Tan ◽

Hongbin Zhan ◽

Renhui He ◽

Ziyang Zhang

Keyword(s):

Quantitative Evaluation ◽

Rock Fracture ◽

Nonlinear Flow ◽

Fracture Geometry ◽

Single Rock Fracture

Download Full-text

Shear induced anisotropy and heterogeneity of fluid flow in a single rock fracture with translational and rotary shear displacements ¿ a numerical study

International Journal of Rock Mechanics and Mining Sciences ◽

10.1016/j.ijrmms.2003.12.026 ◽

2004 ◽

Vol 41 (3) ◽

pp. 426 ◽

Cited By ~ 8

Author(s):

T. Koyama ◽

N. Fardin ◽

L. Jing

Keyword(s):

Fluid Flow ◽

Numerical Study ◽

Rock Fracture ◽

Induced Anisotropy ◽

Rotary Shear ◽

Single Rock Fracture

Download Full-text

Research Advance in Fluid Flow through a Single Rock Fracture

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.628 ◽

2012 ◽

Vol 204-208 ◽

pp. 628-634

Author(s):

Bao Hua Guo ◽

Cai Xia Tian

Keyword(s):

Fluid Flow ◽

Fractured Rock ◽

Rock Fracture ◽

Research Work ◽

Engineering Practice ◽

Flow Through ◽

Research Advance ◽

Single Rock Fracture ◽

Fractured Rock Masses ◽

Channeling Flow

Flow properties through a single rock fracture are the foundation of researching fluid flow in fractured rock masses. Many researchers at home and abroad are engaging in this subject for the urgent need of engineering practice. This article mainly introduces concepts of roughness, aperture, tortuosity, channeling flow, and influencing factors of stress, temperature, anisotropic, inlet head, scale effect, solution etc. Finally, some research work should be done in future are given.

Download Full-text

Laboratory studies of transport within a single rock fracture

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(91)92848-s ◽

1991 ◽

Vol 28 (2-3) ◽

pp. A149

Keyword(s):

Rock Fracture ◽

Laboratory Studies ◽

Single Rock Fracture

Download Full-text

Hydraulic Properties of a Single Rock Fracture Filled by Calcite

Journal of the Japan Society of Engineering Geology ◽

10.5110/jjseg.51.92 ◽

2010 ◽

Vol 51 (2) ◽

pp. 92-96 ◽

Cited By ~ 1

Author(s):

Takato TAKEMURA ◽

Masahiko OSADA ◽

Yukiyasu FUJII ◽

Tatsuo KANAMARU ◽

Manabu TAKAHASHI

Keyword(s):

Hydraulic Properties ◽

Rock Fracture ◽

Single Rock Fracture

Download Full-text

Multiphase models for simulating hot and slightly miscible DNAPL (dense non-aqueous phase fluids) in a saturated rock fracture under deformation

Water Science & Technology ◽

10.2166/wst.2009.023 ◽

2009 ◽

Vol 59 (4) ◽

pp. 755-762 ◽

Cited By ~ 1

Author(s):

Shibani Jha ◽

M. S. Mohan Kumar

Keyword(s):

Mass Transfer ◽

Aqueous Phase ◽

Energy Transport ◽

Phase Transfer ◽

Rock Fracture ◽

External Stress ◽

Multiphase System ◽

Rough Fracture ◽

Interphase Mass Transfer ◽

Joint Deformation

In the present study a two dimensional model is first developed to show the behaviour of dense non-aqueous phase liquids (DNAPL) within a rough fracture. To consider the rough fracture, the fracture is imposed with variable apertures along its plane. It is found that DNAPL follows preferential pathways. In next part of the study the above model is further extended for non-isothermal DNAPL flow and DNAPL-water interphase mass transfer phenomenon. These two models are then coupled with joint deformation due to normal stresses. The primary focus of these models is specifically to elucidate the influence of joint alteration due to external stress and fluid pressures on flow driven energy transport and interphase mass transfer. For this, it is assumed that the critical value for joint alteration is associated with external stress and average of water and DNAPL pressures in multiphase system and the temporal and spatial evolution of joint alteration are determined for its further influence on energy transport and miscible phase transfer. The developed model has been studied to show the influence of deformation on DNAPL flow. Further this preliminary study demonstrates the influence of joint deformation on heat transport and phase miscibility via multiphase flow velocities. It is seen that the temperature profile changes and shows higher diffusivity due to deformation and although the interphase miscibility value decreases but the lateral dispersion increases to a considerably higher extent.

Download Full-text