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2025 | OriginalPaper | Chapter

Future Residual Lakes in the Rhenish Lignite Mining Area - Geotechnical Challenges and Special Aspects

Author : Dieter Dahmen

Published in: Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice

Publisher: Springer Nature Switzerland

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Abstract

As a result of the early phase-out of coal mining, new geotechnical questions have to be answered in connection with the design of opencast mine lakes, in particular with regard to the excavated lake slopes.
Answering these questions requires extensive fundamental research. This is particularly true as the mine slopes are designed for an unlimited lifetime in an earthquake region, and especially as the Hambach “deep lake” will be the lake with the greatest water depth in Germany in the future.
As shown, a wide range of geotechnical questions (stability, earthquake impact, liquefaction resistance, wave impact and erosion, long-term material behaviour) need to be answered, and the results need to be scientifically validated, as subsequent changes to the design or reworking of the slopes are hardly possible in view of the dimensions of the future opencast mine lakes.
On the other hand, the early phase-out of coal requires timely findings for operational decisions. In order to take these operational requirements into account, safe geotechnical approaches were determined in an initial processing phase and corresponding pre-dimensioning was carried out. These have been and will continue to be successively validated and optimised. The work is carried out in cooperation with our external scientific partners and in close coordination with the internal specialist departments involved, in order to be able to evaluate and implement the results directly in terms of planning and operation.

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previous chapter Phase-Field for Compaction Bands in Wet and Dry Limestones
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Metadata
Title
Future Residual Lakes in the Rhenish Lignite Mining Area - Geotechnical Challenges and Special Aspects
Author
Dieter Dahmen
Copyright Year
2025
Book
Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice

Print ISBN: 978-3-031-71895-3

Electronic ISBN: 978-3-031-71896-0

Copyright Year: 2025

DOI
https://doi.org/10.1007/978-3-031-71896-0_2

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