Fachartikel 02_2020
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Long-Term Management of Mine Water Operations in the German Coalfields – an Interim Evaluation of the Findings Based on Operating Plans and Hydrological Permits
The cessation of coal mining in North Rhine-Westphalia on 31st December 2018 marked the start of a period of long-term aftercare measures. The end of coal winning also meant that the original purpose of the mine dewatering operations, which was to make it possible to extract the resources in the…
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The Casing Pipe Method of Converting Mine Water Pumping Stations to Well-Type Operation Based on the Example of CarolinenglĂĽck 3 Shaft
The northwards migration of the coal mining industry created a well-developed network of underground roadways and this allowed interconnected collieries to be organised as combined water drainage systems. This resulted in a centralisation of the water pumping operations. The mine water is currently pumped to the surface at a total…
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Explosion-Proof Casing-Pipe Obturator with Flap Valve Mechanism
Optimising the mine de-watering arrangements involves converting the centralised drainage systems to water wells. In order to retain access to the mine water a series of casing pipes has to be cemented section by section into the filling column. These pipes can then be used at some future date to…
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Development of a Concreting System Based on the Climbing Formwork Concept for the Partial Filling of the Friedlicher Nachbar Shaft
The Friedlicher Nachbar shaft in Bochum is one of the 13 central water pumping stations operated by RAG Aktiengesellschaft, Essen/Germany. One of the unusual features of this installation is that the operation to convert to a well-type system has to be carried out without switching off the pumps in the…
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Long-term Impact of Coal Mining on Surface Movement: Residual Subsidence versus Uplift
It is well known that longwall mining leads to a significant amount of surface subsidence. This is driven by a mechanical stress-deformation process that is initiated when the roof collapses in the mined-out area. Since entire coal basins recently have been closed in Europe, the focus has moved more to…
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New Prospects
The landscaping of the State Garden Show 2020 in Kamp-Lintfort and the concomitant on-time clean-up and preparation of the area for future uses that are required are some of the special challenges facing RAG Montan Immobilien GmbH, Essen/Germany, which has been sustainably revitalising closed mining sites for more than 40…
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Research Areas in Post-Mining
The Research Institute for Post-Mining (FZN) at TH Georg Agricola University (THGA) in Bochum/Germany, has developed an integrated approach to meet the challenges of the post-mining era. Therefore, post-mining covers four research areas: Perpetual tasks and minewater management; Geomonitoring in post-mining; Material science for the preservation of industrial heritage; Reactivation…
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New National Raw Materials Strategy: No Sustainability without Inclusion of Post-Mining
The goal of the German government’s new national raw materials strategy is to confront current and foreseeable future challenges in securing raw materials for the German economy and in particular for the German industry from 2020 onwards. Issues of sustainability will be given greater priority than in the first raw…
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Hard Coal 2019
The year 2019, just as the previous years 2017 and 2018, was a very poor one for hard coal in Germany. Electric power generation using hard coal was down by 31 % in 2019. Over the three years 2017, 2018 and 2019, cumulative power generation from hard coal fell by 49 %…
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