: Baotang Shen, Ove Stephansson, Mikael Rinne · This paper provides a review of hydromechanical (HM) couplings in fractured rock, with special emphasis on HM interactions as a result of, or directly
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· Summary. Numerical simulation of thermo-hydromechanical (THM) coupling in practical complex fractured rocks is an essential but challenging issue for the evaluation and optimization of underground energy production. In this study, we present our work on a scalable parallel compositional simulator for THM coupling, which is suitable
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· Hydromechanical coupling is a two-way street; not only can deformation of geologic media affect groundwater pressure and flow, changes in groundwater pressure can deform rocks and sediments and cause them to fail mechanically. These important interactions underlie phenomena as diverse as sediment compaction, anomalous fluid
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· The simulation of gas flow in shale formation has been a major challenge in the oil and gas industry due to related multiscale pore structure and nonlinear coupled processes such as rock deformation. In this Article, we present a new hierarchical approach for simulating hydromechanical (HM) coupling in fractured shale gas reservoirs with
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· Section snippets An improved hydromechanical coupling model In the framework of particle flow simulation, cohesive porous rocks are represented by an assembly of discrete particles which are connected by bonded interfaces. Voids are distributed along particles.
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· The introduced hydromechanical coupling model has the ability to describe local stress evolution around boreholes and fracture propagation outside of boreholes. With this model in hand, a series of parameter sensitive studies on hydraulic fracturing propagation have been performed, including in situ stress, differential stress,
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· The dynamic interaction between subsurface flow and soil mechanics is often simplified in the stability assessment of variably saturated landslide-prone hillslopes. The aim of this study is to analyze the impact of conventional simplifications in coupling and modeling strategies on stability assessment of such hillslopes in response to precipitation
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· Yan et al. established a hydromechanical coupling model based on the FDEM for studying hydraulic fractures in porous media [27]. However, it is worth noting that the discontinuum-based methods mentioned above often face limitations concerning crack propagation along element boundaries and potential influences from mesh size and
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· Numerical modeling of deformation and damage around underground excavation by phase-field method with hydromechanical coupling Computers and Geotechnics, 138 (2021), 10.1016/j.compgeo.2021.104369 Google Scholar Zeng et al., 2023 Zeng, Q., Bo, L An
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· Characterization of subsurface fluid flow re-. quires accounting for hydro-mec hanical coupling between fluid-pressure varia-. tions and rock deformation. Within this thesis, modeling aspects
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This 3D validation considers a block of fractured rock mass of 2000 m x 1000 m x 1000 m. Permeability is generated by a single family of horizontally fractures with aperture 0.1 mm and frequency 100 (1/m). The rock density is =2500 kg/m3, closure stress is 0 ′=350 MPa, and Poisson ratio is taken as =0.5.
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The hydromechanical coupling failure process and pore water pressure distribution law of basalt are analyzed, and the rationality of the critical pore water pressure failure criterion is verified. These findings are significant for understanding the rock failure process under hydromechanical coupling action and provide a valuable reference for future research.
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Effective Stress in Unsaturated Soils 371 recent experiments confirm this expectation. These phenomena are briefly reviewed in the following section. In what follows, we focus on the role of fluid–fluid interfaces in effective stress formula-tion.Butasdiscussedin
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DOI: 10.1016/j.ijmecsci.2023.108649 Corpus ID: 260322382 Coupling Explicit Phase-field MPM for Two-Dimensional Hydromechanical Fracture in Poro-elastoplastic Media @article{Hu2023CouplingEP, title={Coupling Explicit Phase-field MPM for Two-Dimensional Hydromechanical Fracture in Poro-elastoplastic Media}, author={Zhiqiang
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It is proposed that a means to obtain these functions is through pore-network modelling, by which it is possible to integrate the phenomena of drainage and volume change and the different effects of suction and mechanical loading. The implementation of a two-dimensional pore-network model is described. A simple algorithm for individual pore
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: Chi-Yuen Wang, Michael Manga · We conduct a comparative analysis of this problem based on a mechanical (M) model by assuming an invariant pore pressure and a hydro-mechanical (HM) model
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· In this paper, we present a three-dimensional (3D) grouting model based on the combined finite-discrete element method (FDEM). The 3D grouting model discretizes the problem domain into tetrahedral elements and joint elements, and the grout flows only in the broken joint elements, which satisfies the planar Poiseuille flow.
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: Chenxi Zhao, Chenxi Zhao, Zixin Zhang, Qinghua Lei · This chapter provide the theoretical formulations and numerical procedures involved in hydro-mechanical coupling function in FRACOD. An explicit iteration
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During the hydromechanical coupling calculation, the critical water pressure failure criterion of equation (4) was employed, and the shear and tensile failure criteria of the rocks are defined as follows:where σ1 and σ3 are the maximum and minimum principal 1−sin
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· Subsequently, the mechanical behaviour was characterized, and finally the failure mechanism was revealed. The results showed that: (1) The failure of the sandstone with the bedding angle of 45° or 60° was the structure-dominant type, while that with the bedding angle of 0°, 30° or 90° was the force-dominant type.
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· However, little is known on the coupling between slip stability, healing properties and hydromechanical behaviour of serpentinite rich fault gouges. The purpose of this manuscript is to report on an experimental investigation of the frictional behaviour, including velocity dependence of friction and frictional healing, coupled with hydrological
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· MAIN COMPONENTS INCLUDE: Primary 6-Ring Sizer. Complete R400 60:1 Gearbox / Drive Assembly. Voith 650 TSVC Fluid Coupling Set with under-speed sensor. High Voltage Induction Motor (400kW, 6600v 50Hz, 3 Phase) Oil Pump and Oil Air Cooler with motors. Grease Pump and Grease Tanks with motors. Trolly / Wheel
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· A novel two-dimensional mixed fracture–pore seepage model for fluid flow in fractured porous media is presented based on the computational framework of finite-discrete element method (FDEM). The model consists of a porous seepage model in triangular elements bonded by unbroken joint elements, as well as a fracture seepage
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· Crack propagation and rock failure under hydromechanical coupling have typical time-dependent characteristics, and the subcritical crack propagation is one of the most important causes of rock instability. Rheological tests based on mortar specimens containing single internal 3-D cracks and the corresponding numerical simulations are
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· This paper provides a review of hydromechanical (HM) couplings in fractured rock, with special emphasis on HM interactions as a result of, or directly connected with human activities. In the early 1960s, the coupling between hydraulic and mechanical processes in fractured rock started to receive wide attention. A series of events including
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· The hydromechanical coupling action alters the micro-pore and fracture structure of sandstone. Due to the limit of space, as an example, the SEM results of dry sandstone specimen before test and failed sandstone specimens after post-peak cyclic loading and unloading under confining pressure of 20 MPa are shown in Fig. 24 a–i.
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s. s − − saturation and water pressure head at saturation, respectively; λ is the model parameter and determined for a given soil. The hydraulic parameters used in the simulation for rainfall infiltration and ponding in the loamy sand are from Ref. [44]: Ks=2 cm/h, θs=0.43, θr=0.08, h. s=−22.6. cm, λ =0.53.
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· Unsaturated soils are extensively encountered in nature and engineering practice. Understanding the hydromechanical coupling effects in the infiltration process of an unsaturated porous medium is of considerable interest to the geotechnical and hydrological community. In this paper, a nonlinear, fully hydromechanical coupling
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· Therefore, it is of vital importance to extensively explore the unloading mechanism of rock under hydromechanical coupling conditions. In this research, further investigation into the mechanical behavior and deformation characteristics of sandstone was performed under uniaxial and triaxial compression tests, unloading confining pressure
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· This paper attempts to formulate a coupled practical model in the framework of continuum mechanics to evaluate the phenomenon of internal erosion and its consequences on the mechanical behavior of soils. For this purpose, a four-constituent numerical approach has been developed to describe the internal erosion process. The
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