Nele Pollmann
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View article: Wastes in Underground Coal Mines and Their Behavior during Mine Water Level Rebound—A Review
Wastes in Underground Coal Mines and Their Behavior during Mine Water Level Rebound—A Review Open
Backfill materials of various origin and composition, abandoned machinery, oils, PCB, gallery support material and cables are the main wastes occurring in underground coal mines during the period of their abandonment. Bearing in mind that …
View article: Transport of Waste Material Contaminants during Mine Water Level Rebound in Underground Coal Mines of the Ruhr Area, Germany – Application of Finite-Volume Reactive Transport Modelling
Transport of Waste Material Contaminants during Mine Water Level Rebound in Underground Coal Mines of the Ruhr Area, Germany – Application of Finite-Volume Reactive Transport Modelling Open
In this paper an overview of waste materials in underground coal mines is presented, whereas waste materials can be of anthropogenic or geogenic origin. Complex interactions with mine water and waste materials take place, especially during…
View article: TEXMIN Handbook: A Guide to Managing the Risks Posed to Working and Abandoned Mining Facilities, and to the Surrounding Environment, Caused by Climate Change
TEXMIN Handbook: A Guide to Managing the Risks Posed to Working and Abandoned Mining Facilities, and to the Surrounding Environment, Caused by Climate Change Open
The handbook is a result of TEXMIN research project, implemented under the Research Fund for Coal and Steel (RFCS) programme, which has investigated the impact of future climate change on working and abandoned mining facilities, and to the…
View article: TEXMIN Handbook: A Guide to Managing the Risks Posed to Working and Abandoned Mining Facilities, and to the Surrounding Environment, Caused by Climate Change
TEXMIN Handbook: A Guide to Managing the Risks Posed to Working and Abandoned Mining Facilities, and to the Surrounding Environment, Caused by Climate Change Open
The handbook is a result of TEXMIN research project, implemented under the Research Fund for Coal and Steel (RFCS) programme, which has investigated the impact of future climate change on working and abandoned mining facilities, and to the…
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: Modeling and computational homogenization of chloride diffusion in three-phase meso-scale concrete
Modeling and computational homogenization of chloride diffusion in three-phase meso-scale concrete Open
A computational homogenization technique for modeling diffusion in concrete is introduced with emphasis on the influence of the aggregate content and variability. The highly heterogeneous material is investigated on different scales by com…
View article: Diffuse interface modeling and variationally consistent homogenization of fluid transport in fractured porous media
Diffuse interface modeling and variationally consistent homogenization of fluid transport in fractured porous media Open
We critically assess diffuse interface models for fluid transport in fractured porous media. Such models, often called fracture phase field models, are commonly used to simulate hydraulic stimulation or hydraulic fracturing of fluid-satura…
View article: Multi-scale modeling and finite element simulation of diffusion in porous media
Multi-scale modeling and finite element simulation of diffusion in porous media Open
Porous media comprise a large range of natural and industrial materials and are typically complex on multiple length scales. At lower (micro-scopic) length scales, such media consist of a solid skeleton and fluid-filled pores in between. A…
View article: Numerical investigation of seismic attenuation in fluid‐saturated fractured media: An extended view of the Skempton coefficient
Numerical investigation of seismic attenuation in fluid‐saturated fractured media: An extended view of the Skempton coefficient Open
The interpretation of data from seismic exploration gains from consideration of hydro‐mechanical processes in particular when the waves propagate through fluid‐filled fractured porous rocks. We specifically investigate attenuation processe…