Tobias Backers
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View article: Simulation of displacement rate effect on tensile rock failure using a phase-field fracture approach
Simulation of displacement rate effect on tensile rock failure using a phase-field fracture approach Open
The tensile strength of brittle rocks is commonly determined experimentally using the Brazilian test (splitting tensile strength test). For spatial and temporal upscaling of these experimental results, numerical methods are necessary to pr…
View article: DRAGON Ruhr.nrw: reducing barriers in geosciences and civil engineering education through digital innovation
DRAGON Ruhr.nrw: reducing barriers in geosciences and civil engineering education through digital innovation Open
In geosciences and civil engineering, a key aspect of professional expertise is gaining experience in perceiving and understanding the three-dimensional interactions within the subsurface, as well as between the subsurface and structures, …
View article: Experimental investigation of the effect of thermal cycling loading on physical properties of a sandstone from the Upper Rhine Graben
Experimental investigation of the effect of thermal cycling loading on physical properties of a sandstone from the Upper Rhine Graben Open
Thermal energy storage can help to bridge temporal fluctuations of renewable energy provision, e.g. from wind and solar energy,  and demand, e.g. to avoid system shutdown and associated negative effects on technical equipment and rese…
View article: GeoVis: Developing an immersive educational tool using Unreal Engine 5
GeoVis: Developing an immersive educational tool using Unreal Engine 5 Open
Fieldwork is an essential part of geoscience education, offering hands-on experience in observing and analyzing geological formations. However, participation in fieldwork is often limited by logistical, physical or financial constraints, e…
View article: Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies
Comparison of different methods to characterise the abrasivity potential and mechanical properties of carbonates with respect to its relevance for practical purposes in excavation technologies Open
The characterisation of the abrasivity potential of carbonates plays an important role for drilling-based excavation technologies, for example in tunneling or geothermal exploration. Although carbonates are known to have a rather low abras…
View article: Experimental investigation of the effect of thermal cycling on the thermomechanical properties of three rock varieties for high temperature thermal energy storage
Experimental investigation of the effect of thermal cycling on the thermomechanical properties of three rock varieties for high temperature thermal energy storage Open
During the past years “rock batteries” have become increasingly relevant for the storage of renewable energy sources, such as wind and solar energy, because of their economic and ecological advantages with respect to previously more common…
View article: Fluid flow of various configurations in a rock-proppant-system
Fluid flow of various configurations in a rock-proppant-system Open
A high rock mass permeability is essential for developing an enhanced geothermal system and commonly achieved through the fracture conductivity. Hydraulic stimulation of fractures in combination with the use of proppants can significantly …
View article: 3D in situ stress state modelling and fault reactivation risk exemplified in the Ruhr region (Germany)
3D in situ stress state modelling and fault reactivation risk exemplified in the Ruhr region (Germany) Open
This work was carried out in the framework of the 3DRuhrMarie (“FHprofUnt2016”) project, which received funding from the German Federal Ministry of Education and Research (BMBF) and geomecon GmbH.
View article: Effect of sloppy sample preparation on results from uniaxial compressive strength tests
Effect of sloppy sample preparation on results from uniaxial compressive strength tests Open
The requirements on sample geometry for strength tests are specified in standards and recommendations such as those provided by ASTM, ISRM and DGGT. Various circumstances may lead to deviations from these specifications, e.g., the nature o…
View article: Descriptive and quantitative analysis of fracture systems in a carbonate rock mass complex
Descriptive and quantitative analysis of fracture systems in a carbonate rock mass complex Open
The study area is located in the Franconian Alb in Southern Germany and is an Upper Jurassic, karstified and fractured, regularly bedded carbonate rock mass with thin marl interlayers. Structurally, these deposits are heterogeneous and a c…
View article: Mechanical investigation of rock-proppant interaction with focus on geothermal applications
Mechanical investigation of rock-proppant interaction with focus on geothermal applications Open
Since decades proppants have been used to enhance hydraulic pathways for the exploitation of hydrocarbon reservoirs. These technologies may also be adapted for geothermal applications, but geothermal reservoirs rocks strongly differ from t…
View article: Investigation of hydro-mechanical processes in fluid-saturated fractured rock based on numerical model generation
Investigation of hydro-mechanical processes in fluid-saturated fractured rock based on numerical model generation Open
To realistically simulate fluid flow in fractured rock mass, a scheme to represent the discrete fracture networks (DFN) in the numerical model is of utmost importance. In this paper we discuss a workflow to implement a field-measurement ba…
View article: DECOVALEX-2019 (Task G Final Report)
DECOVALEX-2019 (Task G Final Report) Open
The DECOVALEX Project is an on-going international research collaboration, established in 1992, to advance the understanding and modeling of coupled Thermal (T), Hydrological (H), Mechanical (M) and Chemical (C) processes in geological in …
View article: Decovalex-2019 (Executive Summary)
Decovalex-2019 (Executive Summary) Open
The DECOVALEX Project is an on-going international research collaboration, established in 1992, to advance the understanding and modeling of coupled Thermal (T), Hydrological (H), Mechanical (M) and Chemical (C) processes in geological in …
View article: The in-situ stress state of the Rhine-Ruhr region and its implications for the geothermal energy utilization
The in-situ stress state of the Rhine-Ruhr region and its implications for the geothermal energy utilization Open
<p>The Rhine-Ruhr region is one of the largest metropolitan areas in Europe, with more than 10 million inhabitants, located in western Germany. The region is defined by the rich coal-bearing layers from the upper&#160;Carbonifero…