Nele Pollmann

Nele Pollmann
DMT Group · Civil & Mining Engineering: Hydrogeology & Mine Water Management

PhD

About

12
Publications
1,555
Reads
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19
Citations
Citations since 2017
9 Research Items
19 Citations
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468
201720182019202020212022202302468
Additional affiliations
February 2021 - present
DMT GmbH & Co. KG
Position
  • Engineer
Description
  • numerical modeling in mining engineering
April 2020 - January 2021
Ruhr-Universität Bochum
Position
  • PostDoc Position
Description
  • numerische Simulation geomechanischer Prozesse
August 2018 - December 2019
Chalmers tekniska högskola, division of Material and Computational Mechanics
Position
  • PhD Student
Description
  • Multi-scale modeling and finite element simulation of diffusion in porous media. FEM Simulationen und Berechnungen
Education
October 2008 - October 2013
Ruhr-Universität Bochum
Field of study
  • Mechanical Engineering

Publications

Publications (12)
Book
Full-text available
TEXMIN Handbook has been prepared to make the results of investigated impacts of future climate change on working and abandoned mining facilities, and to the surrounding environment and populations, as well as developed tool available to those who are responsible for aspects of mine operation, mine closure and rehabilitation, and the management of...
Experiment Findings
Full-text available
Based on the climate review & projections of WP1 and the climate impact identification of WP2, the goal of WP3 is to evaluate and quantify the key physical impacts resulting from changes in climatic conditions and relating to the quality and quantity of mine water, the stability of surface mining features and the flow of mine gases to the surface....
Conference Paper
Full-text available
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 based DFN into an FEM code (COMSOL Multiphysics) by means of a MATLAB routine. This workflow is involved in the Z...
Article
Full-text available
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 those typically targeted by hydrocarbon industries. Therefore, the mechanical interaction between conventional p...
Article
Full-text available
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 combining Variationally Consistent Homogenization on numerical microstructures with analytical techniques accounti...
Article
Full-text available
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-saturated porous rock. In this paper, we focus on the less complex case of fluid transport in stationary fracture net...
Article
Full-text available
Characterization of hydro-mechanical processes in reservoir rocks is an essential issue for many geo investigations such as characterization of subsurface fluid flow or geothermal exploitation. For geothermal applications, the role of fractures as storage and transport components of a hydraulic system are highly important. In the present contributi...
Conference Paper
Full-text available
Modern interpretation of seismic surveys aims at going beyond structural characterization of reservoirs on the basis of the spatial distribution of velocity. In particular, hydraulic properties of fluid-filled reservoirs are of prime interest for hydrocarbon exploration or water-reservoir management. Such analyses require a physics-based understand...
Article
Full-text available
Modern interpretation of seismic surveys aims at going beyond structural characterization of reservoirs on the basis of the spatial distribution of velocity. In particular, hydraulic properties of fluid-filled reservoirs are of prime interest for hydrocarbon exploration or water-reservoir management. Such analyses require a physics-based understand...
Article
Full-text available
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 processes in porous rock containing complex fracture networks with the main objective to identify effective hydro-mecha...
Conference Paper
Full-text available
A hydro-mechanically coupled model is used to analyze the frequency-dependent attenuation characteristics of a fluid-filled fractured rock domain. The physics of attenuation related to viscous fluid flow at the pore scale as well as through fractures are analyzed using a hybrid-dimensional approach, which allows to conveniently model large aspect r...
Article
Full-text available
In geomechanics the consolidation of a fluid-saturated soil is of great interest and many theories have been proposed in the recent years. A special case is the consolidation problem in a porous, fluid-saturated sphere under drainage and hydrostatic pressure. For this configuration Cryer [2] discussed the special effect of pore pressure response. W...

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Projects

Projects (2)
Project
Focused on assessing and minimising the environmental impact of extreme weather events on mining operations, TEXMIN aims to provide guidance to all stakeholders on gradual and sudden impacts on operating, closed and abandoned coal mines brought about by climate change and extreme weather events, as this issue is currently affecting sites in Europe and the rest of the world. The overall objective of the TEXMIN project is to develop an integrated management tool and monitoring strategy for reducing the vulnerability of the mining sector to extreme weather events and climate change. The project will achieve this aim through the following specific objectives: 1. To review and record previous extreme weather events in the mining industry and review historic climate trends in mining regions around Europe; 2. To calculate projections of future climate changes for European mining regions for different emission scenarios; 3. To identify, based on these modelled projections, how future climate scenarios could impact on closed, abandoned and operating mines within these regions; 4. To identify, quantify and evaluate those impacts brought about by changes in precipitation, temperature and sudden changes in atmospheric pressure and model them for improvement of the understanding of how changing parameters influence the results; 5. To develop effective adaptation strategies and monitoring solutions to reduce the impact and vulnerability of sites to climate change, and in turn enhance the sustainability credentials of mining activities, especially when related to mine closure and mine closure planning; 6. To develop an integrated risk management tool; 7. To apply in pilot scale the remedial measures for stabilisation of sealed shaft and mine spoil dump in case of extreme weather events occurrence; 8. To involve all stakeholders in a process of consultation and communication of the findings and deliverables throughout the duration of the project to raise attention to these issues and vulnerabilities; 9. To exchange knowledge about extreme weather events affecting different mines in Europe. Project leader: Central Mining Institute (Główny Instytut Górnictwa, GIG) Project partners: Centre for Research & Technology Hellas (EL) - CERTH University of Exeter (UK) - UNEXE Silesian University of Technology (Politechnika Śląska, SUT) (PL) SUBTERRA Ingeniería (E) - SUB DMT GmbH & Co. KG (D) – DMT Výzkumný Ustav pro Hnědé Uhlí a. S (CZ) - VUHU Spółka Restrukturyzacji Kopalń S.A. (PL) - SRK Tauron Wydobycie (PL) - TWD Project website: http://texmin.gig.eu/index.php
Project
The impact of Extreme weather events on Mining operations Lead Partner: GLOWNY INSTYTUT GORNICTWA Whilst extreme weather events that are consequence of climate change has been a well-researched subject for many years, it is only recently that the subject has appeared on the radar of the international mining industry. Some mines have already faced issues relating to increased severe weather events so this issue needs to be addressed. The scenarios of climate change indicate that this types of events will be more frequent and violent. TEXMIN project will identify and evaluate the environmental impacts on operating, closed and abandoned mines caused by extreme weather events. Climate change scenarios will be calculated from regional climate models and climate baseline review. Impacts brought about by increases in precipitation, temperature and sudden changes in atmospheric pressure will be identified and evaluated with respect to mines across Europe. These will focus on issues such as minewater, gas emissions and structural stability. Risks will be assessed and adaptation and monitoring strategies will be proposed and developed to mitigate current and future impacts. Some of the remedial actions proposed for shafts and spoil dumps will be applied and tested in pilot scale. This Project is funded by RFCS. Project Number: 847250