Article
Engineering, Geological
David Holton, David Roberts, Thomas Williams
Summary: This paper describes a methodology for evaluating the influence of thermal stress on fracture aperture around a Geological Disposal Facility (GDF), and presents calculations on an illustrative Discrete Fracture Network (DFN) to estimate the responses of the fractures to rock stress changes.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Feng Ma, Guihong Liu, Zhihong Zhao, Haoran Xu, Guiling Wang
Summary: Numerical reservoir modeling is crucial for understanding and predicting the performance of geothermal reservoirs. This study developed an integrated model to simulate the thermo-hydro-mechanical processes in geothermal reservoirs. Results from a case study showed that the developed integrated model is a robust tool for predicting the performance of city-scale geothermal fields.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
M. Williams, M. Ziegler, Stephan Schennen, S. Loew
Summary: The text presents the results of seismic experiments conducted in two excavation damaged zones (EDZs) in Mont Terri Underground Rock Laboratory. The findings provide valuable insights into the integrity of the rock mass surrounding the excavation and its implications for mid-term safety assessments.
ENGINEERING GEOLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Tsubasa Sasaki, Jonny Rutqvist
Summary: Geologic disposal is a promising solution for safe permanent isolation of high-level nuclear waste, and researchers have developed a method to estimate stress and permeability changes, successfully matching these values in simulations.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Eleonora Sailer, David M. G. Taborda, Lidija Zdravkovic, David M. Potts, Wenjie Cui
Summary: This study investigates the impact of thermal-active structures exchanging heat with the ground, analyzing one-dimensional problems and establishing dimensionless parameters to evaluate THM interactions and their evolution over time. Results show that in THM modeling of thermo-active retaining walls, the structural response is influenced by various factors including thermal expansion of soils, volumetric deformations due to pore water generation, and mechanical boundary conditions. Therefore, performing accurate THM analyses and estimating hydraulic and thermal properties correctly are crucial for ensuring the safe design of thermo-active structures.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Multidisciplinary
Saeed Saeedmonir, Amir R. Khoei
Summary: This paper presents a numerical multiscale formulation for analyzing transient heat and fluid flow in deformable heterogeneous porous media. The proposed method uses first-order computational homogenization to simulate THM problems at two scales, providing an efficient computational procedure. Proper virtual power relations bridge the scales, and microscopic boundary conditions are enhanced to consider transient effects. Macroscopic properties are determined from the microscopic solution using appropriate mathematical procedures. An upwind finite element squared method is employed for accurate spatial results in highly advective heat transfer.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Tuan Nguyen-Sy, Minh-Ngoc Vu, Thoi-Trung Nguyen
Summary: A hybrid Laplace-Galerkin method is proposed for modeling thermo-hydro-mechanical coupled problems of fluid saturated porous media in unsteady state regime. This technique does not require any time stepping and achieves accurate results by transforming weak form equations into Laplace space and using Galerkin finite element method.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Engineering, Multidisciplinary
N. H. Tran, T. T. N. Nguyen, D. T. Pham, H. T. Trieu
Summary: The deep geological disposal facility is considered as the most appropriate solution for the safe long-term management of high-level radioactive waste. Clays, due to their properties like very low permeability, stability, high retention capacity, and self-sealing, have been selected as the host formation in several countries. However, the disposal of waste packages can lead to an increase in temperature within the host rock, causing excess pore pressure and potential thermo-hydro-mechanical (THM) responses. This paper presents coupled THM constitutive equations for a saturated porous medium and their finite element solution, in order to assess the behavior of the host rock in a HLW repository.
JOURNAL OF APPLIED SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Geological
Hao Fu, Erxiang Song, Rui Tong
Summary: In this paper, a numerical model considering fully thermo-hydro-mechanical (THM) coupling is proposed to study the characteristics of frost heave and calculate the frost heave amount and frost heave pressure. The model takes into account the complex interactions among water flow, heat transfer, stress equilibrium, phase change, and ice segregation. Simulation tests on frost heave amount and frost heave pressure validate the reliability of the proposed model.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Geosciences, Multidisciplinary
Ke Man, Xiaoli Liu, Zhifei Song
Summary: The study conducted blasting tests in the Beishan Exploration Tunnel and monitored blasting vibration velocity and excavation damaged zone, identifying the impact of different blasting parameters on vibration velocity and damaged depth, and proposing a method to control rock damaged depth.
GEOMATICS NATURAL HAZARDS & RISK
(2021)
Article
Energy & Fuels
Saeed Mahmoodpour, Mrityunjay Singh, Ramin Mahyapour, Sri Kalyan Tangirala, Kristian Baer, Ingo Sass
Summary: This study examines the impact of thermo-poro-elastic stress field disturbance caused by cold fluid injection on porosity and permeability, and its importance in heat extraction from enhanced geothermal systems. A validated numerical simulation model combining operational and field data is used to analyze the mechanical impact on pressure and temperature evolution. The results show that stress field changes strongly affect permeability and porosity values near the injection wellbore zones, and these changes have an overall impact on system temperature and pressure.
Article
Green & Sustainable Science & Technology
Rahim Habibi, Shokrollah Zare, Amin Asgari, Mrityunjay Singh, Saeed Mahmoodpour
Summary: This study presents the coupled Thermal-Hydraulic-Mechanical-Chemical (THMC) processes in the storage and disposal of hydrocarbons, hydrogen, compressed air, and nuclear waste in salt formations. The aim is to identify key parameters associated with each process and evaluate available simulation codes/software. The outcome of this study will help design a comprehensive framework to enhance environmental and operational safety measures.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Engineering, Geological
Xin Cui, Louis Ngai Yuen Wong
Summary: Enhanced geothermal systems (EGS) are currently the most efficient method to extract heat from hot dry rock (HDR) reservoirs. This study developed a novel 3D thermo-hydro-mechanical coupling model to predict the long-term performance of EGS. The simulation results showed that while EGS maintains high productivity during early injection stages, it degrades rapidly once thermal drawdown occurs.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Multidisciplinary
Xin Cui, Louis Ngai Yuen Wong
Summary: Thermo-hydro-mechanical (THM) coupling is prevalent in underground activities, and numerical simulation plays a crucial role in understanding THM coupling. The primary challenge lies in solving a system of partial differential equations (PDEs) with displacements, pore pressure, and temperature as the primary variables. Previous studies have mainly focused on UPT and U-PT schemes, with limited exploration of the promising UP-T scheme. Moreover, the performance of different solution schemes and stabilization of 3D simulations under advection-dominated heat transfer have not been adequately reported. This study introduces HENGYI, a new THM coupling simulator developed using the finite element method, which employs the robust UP-T scheme and the Streamline Upwind Petrov Galerkin method for advection-dominated heat transfer. The applicability of different solution schemes is found to be highly dependent on the degree of coupling between primary variables.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Construction & Building Technology
Martin Ziegler, Arash Alimardani Lavasan, Simon Loew
Summary: This study presents in-situ datasets obtained from the monitoring section of a faulted section in the new Belchen tunnel tube in the Swiss Jura Mountains. The data reveals heterogeneous radial pressures on the tunnel support and a gradual increase over the course of four years. Numerical simulations also show a significant temperature effect on the measured total pressures.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Qi Zhao, Nicola Tisato, Giovanni Grasselli, Omid K. Mahabadi, Andrea Lisjak, Qinya Liu
GEOPHYSICAL JOURNAL INTERNATIONAL
(2015)
Article
Engineering, Geological
Andrea Lisjak, Bryan S. A. Tatone, Omid K. Mahabadi, Giovanni Grasselli, Paul Marschall, George W. Lanyon, Remi de la Vaissiere, Hua Shao, Helen Leung, Christophe Nussbaum
ROCK MECHANICS AND ROCK ENGINEERING
(2016)
Article
Construction & Building Technology
A. Lisjak, B. Garitte, G. Grasselli, H. R. Mueller, T. Vietor
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2015)
Article
Engineering, Civil
Giovanni Grasselli, Andrea Lisjak, Omid K. Mahabadi, Bryan S. A. Tatone
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2015)
Article
Geochemistry & Geophysics
A. Lisjak, Q. Liu, Q. Zhao, O. K. Mahabadi, G. Grasselli
GEOPHYSICAL JOURNAL INTERNATIONAL
(2013)
Article
Engineering, Geological
A. Lisjak, G. Grasselli, T. Vietor
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2014)
Article
Engineering, Geological
Andrea Lisjak, Bryan S. A. Tatone, Giovanni Grasselli, Tim Vietor
ROCK MECHANICS AND ROCK ENGINEERING
(2014)
Article
Engineering, Geological
O. K. Mahabadi, A. Lisjak, A. Munjiza, G. Grasselli
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2012)
Article
Computer Science, Interdisciplinary Applications
A. Lisjak, P. Kaifosh, L. He, B. S. A. Tatone, O. K. Mahabadi, G. Grasselli
COMPUTERS AND GEOTECHNICS
(2017)
Proceedings Paper
Engineering, Geological
A. Lisjak, O. K. Mahabadi, P. Kaifosh, T. Vietor, G. Grasselli
ROCK ENGINEERING AND ROCK MECHANICS: STRUCTURES IN AND ON ROCK MASSES
(2014)
Article
Engineering, Geological
Andrea Lisjak, Daniel Figi, Giovanni Grasselli
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2014)
Review
Engineering, Geological
A. Lisjak, G. Grasselli
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2014)
Proceedings Paper
Geochemistry & Geophysics
G. Grasselli, Q. Zhao, A. Lisjak, Q. Liu
ROCK DYNAMICS AND APPLICATIONS - STATE OF THE ART
(2013)