Coupled Thermo-Hydro-Mechanical Processes in Fractured Rock Masses
Discrete Element Modeling and Engineering Applications
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Article
Transformation mechanism of suffusion and backward erosion pi** in gap-graded soil: an experimental study
Suffusion and pip** are two main causes for dam and dike failures. In this study, a permeameter with transparent specimen tank was developed, which allowed internal erosion process recording via a camera, an...
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Article
Site water salinity effect on the hydro-mechanical behavior of compacted GMZ bentonite with technological void
The hydromechanical behavior of compacted bentonite in near-field salinity groundwater environment is of great importance for achieving the low-permeability sealing capacity in deep geological repositories. Wi...
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Article
DEM Analysis of the P-Wave Anisotropy Response to the Microstructure of Sedimentary Rock Under Biaxial Compression
This study presents a method to characterize anisotropic microcracks and discontinuous bedding in rock using the discrete element method (DEM). We focus on the influence of microstructure on P-wave velocity an...
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A thermal–mechanical coupled DEM model for deep shale reservoir: the effects of temperature and anisotropy
This paper presents a new thermal–mechanical coupled numerical approach to investigate the effects of temperature and inherent anisotropy on deep reservoir shale. The proposed method combines the discrete elem...
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Frictional Stability and Permeability Evolution of 3D Carved Longmaxi Shale Fractures and Its Implications for Shale Fault Stability in Sichuan Basin
Fluid injection associated with unconventional resource extraction activities can alter the friction-permeability relationship of fractures, thereby significantly affecting the stability of fractures/faults. I...
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Article
Open AccessFire-Retarding Asphalt Pavement for Urban Road Tunnels: A State-of-the-Art Review and Beyond
With the rapid urbanization and development of metropolises, urban road tunnels have been constructed at an increasing rate, significantly alleviating urban traffic pressure, and improving urban resilience. Fi...
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Full-scale in situ experimental study on the bearing capacity of energy piles under varying temperature and multiple mechanical load levels
Although the thermomechanical behaviors of energy piles have been investigated through a limited number of full-scale tests with constant loads, the effect of multiple load levels on the bearing capacity of en...
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DEM Modeling of Simultaneous Propagation of Multiple Hydraulic Fractures Across Different Regimes, from Toughness- to Viscosity-Dominated
To improve the effectiveness of fracturing treatment, it is vital to understand how multiple fractures interact with each other. This study presents a fully coupled hydraulic fracture model that considers both...
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Open AccessSize effect on hydraulic properties of rough-walled fractures upscaled from meter-scale granite fractures
To better bridge the gap between lab-scale data and larger-scale applications. In this study, an integrated method was developed to investigate the size dependence of fluid flow through rough-walled fractures....
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Article
Open AccessHigh seismic velocity structures control moderate to strong induced earthquake behaviors by shale gas development
Moderate to strong earthquakes have been induced worldwide by shale gas development, however, it is still unclear what factors control their behaviors. Here we use local seismic networks to reliably determine ...
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Open AccessIntegrated microseismic and geomechanical analysis of hydraulic fracturing induced fault reactivation: a case study in Sichuan Basin, Southwest China
Because of the special geographical location adjacent to the Tibetan Plateau, the geological setting of the Sichuan Basin is very complex, which brings a great challenge to shale gas development. In this study...
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Open AccessFrictional stability and permeability evolution of fractures subjected to repeated cycles of heating-and-quenching: granites from the Gonghe Basin, northwest China
Fluid injection into enhanced geothermal system (EGS) reservoirs can reactivate subsurface fractures/faults and trigger earthquakes—requiring that frictional stability and permeability evolution characteristic...
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Chapter
3D Lattice Modeling of Hydraulic Fracturing in Naturally Fractured Reservoirs
Simulation of hydraulically driven fractures on a reservoir scale is a challenging problem. It involves simulation of coupled processes, including deformation and fracturing of rock, and fluid flow in open hyd...
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Heat Advection and Forced Convection in a Lattice Code
A three-dimensional thermo-hydro-mechanical numerical model with thermal capabilities to study the response of geothermal reservoirs to stimulation and production is discussed in this chapter. We present an ef...
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Book
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Three-Dimensional Experimental and Numerical Investigations on Fracture Initiation and Propagation for Oriented Limited-Entry Perforation and Helical Perforation
The competitive initiation from multiple perforation tunnels and the non-planar propagation near the wellbore for different perforation technologies are not fully understood. Laboratory physical experiment can...
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Chapter
Introduction to the Discrete Element Method (DEM)
This chapter introduces the mathematical formulations, numerical models and solution schemes used throughout the book. The discrete and distinct element methods are introduced and defined. The calculation cycl...
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Chapter
DEM Coupled with Computational Fluid Dynamics (CFD)
The coupling of computational fluid dynamics (CFD) and discrete element method (DEM) is a well-established technique used to model physical phenomena span the spectrum between flow in a porous media to the tra...
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Chapter
DEM Coupled with Lattice-Boltzmann Method (LBM)
The lattice-Boltzmann method (LBM) is a powerful tool for simulating incompressible viscous flow, offering several advantages over traditional computational fluid dynamics (CFD) approaches. Instead of solving ...
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Chapter
Models of Stimulation and Production from Enhanced Geothermal Systems
This chapter is focused on a series of sensitivity studies using a numerical modeling approach with respect to some of the key field and operational parameters in Enhanced Geothermal System (EGS) reservoirs. T...
