A5051989481- Soil and Unsaturated Flow
- Groundwater flow and contamination studies
- Rock Mechanics and Modeling
- CO2 Sequestration and Geologic Interactions
- Landslides and related hazards
- Hydraulic Fracturing and Reservoir Analysis
- Grouting, Rheology, and Soil Mechanics
- Seismic Imaging and Inversion Techniques
- Nuclear and radioactivity studies
- Geotechnical and Geomechanical Engineering
- earthquake and tectonic studies
- Geothermal Energy Systems and Applications
- NMR spectroscopy and applications
- Geographic Information Systems Studies
- Geotechnical Engineering and Underground Structures
- Geophysical and Geoelectrical Methods
- Geological Modeling and Analysis
- Video Analysis and Summarization
- Dam Engineering and Safety
- Seismology and Earthquake Studies
- Hygrothermal properties of building materials
- Tunneling and Rock Mechanics
- Scientific Computing and Data Management
- Building materials and conservation
- Fault Detection and Control Systems
Federal Institute for Geosciences and Natural Resources
2014-2024
Leibniz Institute for Applied Geophysics
2014
Leibniz University Hannover
2013
Abstract In this paper, thermo-hydro-mechanically (THM) coupled processes triggered during the construction, operation and closure of a deep geological repository for heat generating, high level radioactive waste are discussed based on generic disposal concept. For purpose, we using numerical non-isothermal two-phase–two-component flow in deformable porous media (TH 2 M) implementation (Grunwald et al. Geomech Geophys Geo-energy Geo-resour, 2022) open-source software OpenGeoSys (Bilke...
We present results from an international model comparison study involving a series of controlled fault activation experiments in Opalinus Clay at the Mont Terri Laboratory, Switzerland. The were conducted situ by water injection variable pressure boreholes targeting different parts Main Fault crossing several tunnels and galleries Laboratory. simulations focused on (1) experiment activating discontinuity (fracture or minor fault) within damage zone main fault, (2) discontinuities close to...
To enable safe geological storage of high-level radioactive waste, a comprehensive understanding the overall system must include relevant physical processes, and geotechnical boundary conditions. In Mont Terri Rock Laboratory (Switzerland) Cyclic Deformation (CD-A) experiment has been established with excavation two twin niches in year 2019. study impact different climatic conditions on hydraulic mechanical processes claystone, an extensive investigation program carried out. As part CD-A...
In the Mont Terri Rock Laboratory (Switzerland), a comprehensive interdisciplinary exploration program is carried out to increase knowledge about long-term coupled hydraulic–mechanical effects in Opalinus Clay. As these are of significant interest regarding stability and integrity potential storage facility for high radioactive waste, "Influence humidity on cyclic longterm deformations" (CD-A) experiment aims characterize Clay, especially its heterogeneous sandy facies, investigate evolution...
Geological materials such as Opalinus Clay show complex coupled hydro-mechanical behavior at laboratory and field scales. In the context of radioactive waste disposal, in-situ excavations might remain open for ventilation operation decades and, consequently, be susceptible to environmental changes desaturation. The saturation can then lead mechanical deformation desiccation cracks. To account cracking scale, this study proposes an unsaturated model combined with phase-field approach. Using...
Abstract The present paper gives an overview of the GeomInt project “Geomechanical integrity host and barrier rocks—experiment, modelling analysis discontinuities” which has been conducted from 2017–2020 within framework “Geo:N Geosciences for Sustainability” program. research concept collaborative is briefly introduced followed by a summary most important outcomes. puts geological discontinuities into centre investigations—as these belong to interesting critical elements any subsurface...
In the ANSICHT project that was jointly carried out by DBE TECHNOLOGY GmbH, BGR, and GRS gGmbH, two generic geological site models were used to develop a first draft of methodology demonstrate safety high-level waste (HLW) repository in argillaceous formations Germany, taking into account regulatory requirements. The main results are characterised developed concepts adapted conditions. specific quantifications integrity criteria their exemplary application with calculational proofs host...
Abstract The present work deals with diffusion of gases in fully saturated porous media. We test and validate the gas transport mechanism dissolution diffusion, implemented TH 2 M process class open-source finite-element software OpenGeoSys. discuss importance for integrity multi-barrier system. Furthermore, we a multi-component mass balance equation implementation Python, which serves as reference two-component allows discussion liquids. verify numerical implementations follows: First, come...
Abstract In the Mont Terri Rock Laboratory (Switzerland), an interdisciplinary examination program is carried out to increase knowledge about coupled hydro-mechanical effects in Opalinus Clay, which are of significant interest regarding stability and integrity a potential storage facility for high-level radioactive waste. This article focuses on characterization claystone near field excavations related hydraulic due excavation ventilation. Electrical resistivity tomography (ERT) applied...
This paper focuses on hydraulic-mechanical effects in the Mont Terri rock laboratory (Switzerland) and investigates their impact pore pressure, convergence of a niche evolution pre-existing cracks wallrock niche. A comparison measurements with numerical simulation results is conducted. The presented situ include long-term data temperature, relative humidity, convergence, as well crackmeter jointmeter determining aperture bedding-parallel crack. Furthermore, time-domain-reflectometry were...
Underground Research Laboratories (URLs) allow geoscientific in-situ experiments at large scale. At the Mont Terri URL in Switzerland, international research groups conduct numerous parallel. The measured and simulated data as well results obtained from them are highly relevant they improve general understanding of geological processes, for example context radioactive waste disposal. Unfortunately, test site is often only available to researchers who directly involved a particular...
Opalinus Clay (OPA) has been one of the main focuses international geoscientific research due to its potential use as a host rock for storage heat-generating radioactive waste. In-situ experiments taking place in Mont Terri Rock Laboratory Switzerland provide valuable insights into material properties and behavior OPA. The Cyclic Deformation (CD-A) experiment conducted since October 2019 laboratory investigate hydro-mechanical effects through long-term direct indirect measurements such...
<p>The Mont Terri rock laboratory is situated in a clay formation the northwestern part of Switzerland and place several research focused experiments. These experiments enable study relevant coupled effects Opalinus Clay formation, an important material context radioactive waste management due to its possible use as geological barrier. Our focuses on cyclic deformation (CD-A) experiment, which aims at investigating hydro-mechanical (HM) behavior material, e.g. shrinkage,...
Assessing barrier integrity under varying environmental conditions is crucial in the context of radioactive waste disposal. This study, originally  conducted at Mont Terri Rock Laboratory Switzerland within Cyclic Deformation (CD-A) experiment, gains new understanding this context. The laboratory, located an Opalinus Clay formation, has been also instrumented to observe triggers desiccation cracking open and closed excavations. Seasonal changes play important role especially during...
Abstract This paper presents the design, implementation, and evaluation of VR-EX, a combination virtual field trip serious game in immersive reality. The application’s purpose is communication research conducted Mont Terri underground laboratory Switzerland. VR-EX enables users to actively attend electrical resistivity tomography measurements within geological experiment, from planning execution analysis results, this way implements an active playful learning approach. work laboratories has...
<title>Abstract</title> In this paper, we present the results of a large-scale numerical model generic nuclear waste repository situated in an argillaceous host rock formation. Modelling evolution entire presents challenges due to strong contrast spatial and temporal scales at which different processes take place, ranging from centimetres kilometres days hundreds thousands years, respectively. From view point physical processes, further challenge originates gas transport mechanisms: Gas...
&lt;p&gt;Claystone is characterized by a complex, highly coupled hydraulic-mechanical behavior. The physical understanding of the related effects great importance concerning stability during construction phase as well for safety assessment integrity potential repository high-level nuclear waste. rock laboratory Mont Terri, Switzerland, provides unique possibility to conduct in-situ experiments in Opalinus Clay broad international community. experiment on influence humidity cyclic and...
Abstract. Salt, crystalline and clay formations are under discussion as potential host rocks for storage of heat-generating radioactive waste. Each these has a different structure composition, consequently material behavior. The latter needs to be studied evaluated with respect the main aim: find place store waste in safe sustainable manner. Several requirements context safety repository need fulfilled, concerning long-term well operational phase. One key point this matter is integrity,...