Glück auf! 3/2016

ISSUE 03/2016

The NRW Mines Inspectorate Approach to the Hazards Posed by Abandoned Mines

North Rhine-Westphalia can look back at a long tradition of mining and there is even verifiable evidence of mining activities dating back to the 13th century. The economic development of some regions – including the Ruhr, Siegerland, Aachen and the Oberbergish Land – is closely associated with the mining industry. The natural resources of North Rhine-Westphalia have been worked for many generations and include lignite, coal, rock salt, slate and various metal ores. The legacies of the mining industry still have damage relevance to this day and the dangers posed by abandoned mines can extend right up to the surface. This paper describes the measures being taken by Arnsberg District Government to develop a risk management strategy for the abandoned mines of North Rhine-Westphalia.

Authors: Abteilungsdirektor Friedrich Wilhelm Wagner, Leiter der Abteilung Bergbau und Energie in NRW, Leitender Bergvermessungsdirektor Andreas Welz, Leiter des Dezernats Altbergbau und Bergdirektor Ulrich Hoppe, Dezernent im Sachgebiet Markscheiderische Aufgaben im Altbergbau bei der Bezirksregierung Arnsberg, Dortmund

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Elements and Aspects of the Post-Mining Era

The subsidised German coal industry will cease to exist on 31.12.2018. The post-mining era will then set in, not just in the coalfields of North Rhine-Westphalia and Saarland, but in many other German mining regions too, where it has already been a reality for some time. The elements and aspects of the post-mining age will mean a permanent weighing-up of opportunities and risks, and this is a task that will also face coming generations. The post-mining era will be a time for risk prevention, restoration and the re-development of former mining sites. Two of the key challenges will be to protect and secure surface structures and to manage mine-water flow. Specially developed monitoring systems will play a vital role here, while in terms of land recycling and conversion the focus will be on drawing up plans for attracting and establishing new businesses, developing renewable-energy production facilities, ecological upgrading and promoting tourism and cultural attractions.

Authors: rof. Dr. rer. nat. Christian Melchers und Prof. Dr.-Ing. Peter Goerke-Mallet, Forschungszentrum Nachbergbau der Technischen Hochschule Georg Agricola (THGA), Dipl.-Ing. Karl Kleineberg, DMT Gesellschaft für Lehre und Bildung mbH, Bochum

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Mine Surveying and Post-Mining Activities of RAG Aktiengesellschaft

RAGAktiengesellschaft, Herne/Germany, owns the last two coal mines in Germany: the mine Prosper-Haniel in Bottrop and the Mine in Ibbenbüren. At the end of 2018 the production of hard coal will be finished. But even then the RAG Aktiengesellschaft remains responsible for the consequences caused by the coal industry. The area of responsibility will include settling of mining damage and the handling of closed mines among others. RAG Aktiengesellschaft is intensively dealing with this matter, bears the responsibility and takes action. This article demonstrates how the risks of historical mine building and former surface openings are consequently met in the post-mining sector. The majority of these risks date from long before the foundation of RAG Aktiengesellschaft. Important elements are a well-functioning risk management system, an optimized monitoring system and preventive exploration and remediation measures which are state of the art.

Authors: Dipl.-Ing. Stefan Hager, Leiter Servicebereich Standort- und Geodienste, und Dipl.-Ing. Frank Wollnik, Abteilungsleiter Altbergbau/markscheiderische Bearbeitung im Servicebereich Standort- und Geodienste der RAG Aktiengesellschaft, Herne

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Residual Lakes in the Rhineland Lignite Area

The lignite mining area of the Rhineland/Germany is bounded by the three cities of Dusseldorf, Cologne and Aachen. Lignite has been mined in this locality since the 18th century and the three opencast mines currently in operation, namely Inden, Hambach and Garzweiler, produce between 90 and 100 mt of fuel a year. About 85 % of the annual production is used for electricity generation, with the remaining 15 % being delivered to processing plants. The following paper sums up the authorisation and approval status of Rhineland’s three remaining opencast lignite mines in terms of their future land-use and development.

Author: A.d.B. Jasmin Korbmacher M.Sc. , Dezernat Rohstoffe im Tagebau in der Abteilung für Bergbau und Energie in NRW der Bezirksregierung Arnsberg, Dortmund

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Investigation, Securing and Remediation of the Former Coal Mine Vihovići in Mostar, Bosnia-Herzegovina

The City of Mostar is located in the South of Bosnia and Herzegovina. In the West and in the North of the city, lignite was exploited in underground mining in the suburban municipalities Ilići, Cim, Vihovići and Raštani since the mid of the 19th century. In Vihovići, lignite was also mined in open pit. Since the 1980ies, large parts of the exploitation area were overbuilt by expanding residential areas.

Authors: Dipl.-Geol. Michael Mackenbach, Dipl.-Geol. Nikolaus Linder, Abteilung Mining & Environment der Fichtner Water & Transportation GmbH, Essen

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The Project “Sustainable Site Development of the Mining Region Erdenet, Mongolia”

The project “Sustainable site development of the mining region Erdenet, Mongolia” was commenced in spring, 2014 by the partners and project sponsors the government of the province of Orkhon and mayor of the city of Erdenet, the management of the Erdenet Mining Corporation (EMC) and the management of the Berlin-based mining consulting company geotec Rohstoffe GmbH.

The overall objective of the project is defined as follows: Development and implementation of a program of measures for the ecological rehabilitation and economic re-valorization of the mining region Erdenet. From the very beginning the guiding principle was to develop the project “Sustainable site development of the mining region Erdenet, Mongolia” as a pilot project for Mongolia as well as to develop the project under the bilateral cooperation between Germany and Mongolia.

Authors: Dr. rer. nat. Rüdiger Schwarz, Geschäftsführer, Dennis Bastian M. Sc., Explorationsgeologe, und Rebecca Reiche B. Sc., Projektmanagerin geotec Rohstoffe GmbH, Berlin

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The German Lignite Industry in 2015

Germany’s domestic lignite output decreased by 0.1 % from 178.2 mt to 178.1 mt between 2014 and 2015. 2015’s extracted lignite had a net calorific value of 54.9 mtce. 159.3 mt, or almost 90 %, of that output were used in utility power plants supplying the general public. This translates into an increase of 0.2 % compared to the previous year. 14.9 mt were used in the factories of the lignite mining industry for the manufacture of solid products. 2.0 mt were used to generate electricity in mine-mouth power plants. 1.9 mt accounted for other sales of raw lignite and changes in stocks. Lignite’s contribution to Germany’s total electricity production amounted to 23.8 % in 2015.

Authors: Dipl.-Volkswirt Uwe Maaßen, Geschäftsführer Statistik der Kohlenwirtschaft e. V., Köln, und Dr. rer. pol. Hans-Wilhelm Schiffer, Executive Chair World Energy Resources, World Energy Council, London

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