Vor den Toren der Stadt Dresden wurde im Döhlener Becken ohne Unterbrechung seit dem 16. Jahrhundert bis zum Jahr 1989 Steinkohle im Tiefbau gewonnen. In den Jahren von 1945 bis 1989 wurde mit Unterbrechungen auch uranhaltige Steinkohle abgebaut. Die Region wird von der Weißeritz durchflossen. Westlich der Weißeritz befindet sich das Grubenfeld Zauckerode. Auf der östlichen Seite spricht man vom Burgker Revier. Bereits in den 1980er Jahren wurde an Konzepten zur Verwahrung der Bergwerke gearbeitet. Ein zentrales Element der Verwahrung der bergbaulichen Hinterlassenschaften im Bereich westlich und östlich der Weißeritz war die dauerhafte Ableitung der Grubenwässer über den 6 km langen Tiefen Elbstolln in die Elbe. Zwischen 1991 und 2014 unternahm die Wismut GmbH erhebliche Anstrengungen zur umweltverträglichen Verwahrung der Bergbaubetriebe. So wurde der Versuch unternommen, den Grubenwasseranstieg im östlichen Revier auf einem Niveau oberhalb des Tiefen Elbstollns nahe der Tagesoberfläche zu stabilisieren. Die dabei gewonnenen Erfahrungen führten zum Rückgriff auf „Plan B“. Damit ist die Auffahrung des sogenannten Wismut-Stolln gemeint, der den hydraulischen Anschluss der Grubenbetriebe östlich der Weißeritz an das untertägige System westlich der Weißeritz und damit an den Tiefen Elbstolln realisiert. Im Zeitraum der Verwahrung hat die Wismut GmbH im Döhlener Becken insbesondere bei der Anhebung des Grubenwasser-Niveaus eine Vielzahl wertvoller Erfahrungen gesammelt, die von wesentlicher Bedeutung sind. Dies gilt auch für die Abschlussarbeiten an Schächten und Bergehalden. Mit der Fertigstellung der Auffahrung des Wismut-Stollns ist das Revier erfolgreich und umweltverträglich verwahrt. Das Forschungszentrum Nachbergbau an der Technischen Hochschule Georg Agricola zu Bochum ist von der Wismut GmbH beauftragt worden, den Grubenwasseranstiegsprozess zu evaluieren. Ziel ist es, den Lernprozess im Zuge des Grubenwasseranstiegs im Döhlener Becken in seinen wissenschaftlichen Aspekten zu bewerten und die Erkenntnisse für zukünftige Projekte verfügbar zu machen. Die Ergebnisse dieser Arbeiten sind zentraler Bestandteil des Vortrages. / In the southwest of Dresden within the area of the „Doehlen basin“ hard coal was continuously mined from the 16th century until 1989. The long-term drainage of mine water along the 6 km long deep drainage adit „Tiefer Elbstolln“ into the receiving river Elbe is the central issue of the mine closure process. During this process the Wismut GmbH gained a multitude of valuable experience, especially concerning the rising mine water table.

Es handelt sich um eine Arbeitsschrift zur Montangeschichte der Gegend um Langenstriegis. Neben wenigen historischen Bergbau ist das Arbeitsgebiet durch Prospektionen auf Eisenerz im 19. Jahrhundert bekannt geworden. Jedoch kam ein anhaltender wirtschaftlicher Abbau der vorhandenen Erze nie zustande. die Arbeitsschrift betrachtet diese Zeitepoche besonders.:1. Allgemeines 1.1 Zur Lage des Bergbaugebietes 1.2 Regionalgeschichte 1.3 Geologie und Mineralogie 2. Montangeschichte 2.1 Zur Lage der Berggebäude in Langenstriegis 2.2 Belehnungen 3. Letzte Bergbauperiode - Bergbauversuche und Spekulationen um Langenstriegis 3.1 Muthungen 3.2 Wassernutzung des Eleonora Erbstolln 3.3 Bergschäden im Bereich der alten Grubenfelder 4. Weiterführende Quellen Impressum

In Indonesia, the various mining commodities and the amount of resources and reserves are promising, as evidence there are numerous large-scale mining companies and small-scale mines in operation. In 2014 there were 41 companies that held the CoW (mineral contract of work) and 13 companies active in production; and 76 CCoW (coal contract of work) holders, and 57 companies active in production. As well as this, there are more than a thousand small-scale mining companies active for mining commodities. However, mining commodities provide a resource that is not renewable. This will potentially lead to prolonged problems when mining companies do not adhere to good mining practices, particularly in the closing stages of the mine. Mine closure is the final stage in the process of mining activity. In certain circumstances, closure activities can take a long time and of course can have huge costs. In fact, at this stage, the company is no longer making profit, only incurring costs for the project closure. To prevent problems that may arise after the mine is closed, such as abandoned post-mining land, and the bankruptcy of the company at the end of mining operations, etc., then through specific rules, ie rules of the Minister of Energy and Mineral Resources No. 18 of 2008, the mining company in Indonesia must provide a certain amount of money as a financial guarantee to finance the planned closure project; it must be approved by the government before entering this phase. However, problems are encountered in practice. The government may become overloaded because they have to quickly make a decision on the closure plan submitted by the company. So a tool is needed that can be used to assess the feasibility as soon as the mine closure plan is proposed by a company, these tools can provide an overview and a variety of options for decision making. In this dissertation methodology was developed to create a systems dynamic model of mine closure. The model developed can be applied to a variety of mining methods and for various mining commodities. The model can be used to determine the closure costs, to choose the closure project-financing scenario, and up to micro and macro economic analysis of mining activities in the region. In the case studies conducted in this dissertation, the best scenario of the mine closure planning is to include the everlasting fund in the form of time deposits, and convert the post-mining land for agriculture. The amount of deposit money is about USD 358,986,500 should be spare at the end of mine production, and the total of mine closure cost to be approximately USD 440,757,384. Agriculture, the economic sector as a substitute for the mining sector, the added value to the GRDP (Gross Regional Domestic Product) is about 0.25 % / a for the province, and 1.68 % for the regency, but the contribution of the mining sector to GRDP was 30% / a at province scale, and 90% / a at regency scale. So that the substitution value is less significant to GRDP growth. However, this scenario is the best scenario among others, due to consideration is the certainty of ecological and economic sustainability. it is the best goal of corporate social responsibility to the environment in the post- mining land.

Zugl.: Berlin, Humboldt-Univ., Diss., 2008

Freiberg, TU Bergakademie, Diss., 2000.

The first conference on Real-Time Mining is bringing together individuals and companies working on EU-sponsored projects to exchange knowledge and rise synergies in resource extraction innovation. The topics include: • Resource Modelling and Value of Information; • Automated Material Characterization; • Positioning and Material Tracking; • Process Optimization; • Data Management. The conference has been initiated by the consortium of the EU H2020 funded project Real-Time Mining as a platform for inter-project communication and for communication with project stakeholders. It brings together several European research projects in the field of industry 4.0 applied to mineral resource extraction. These are the projects VAMOS, SOLSA and UNEXMIN.

The flow of information, and consequently the decision-making along the chain of mining from exploration to beneficiation, typically occurs in a discontinuous fashion over long timespans. In addition, due to the uncertain nature of the knowledge about deposits and the inherent spatial distribution of material characteristics, actual production performance often deviates from expectations. Reconciliation exercises to adjust mineral resource and reserve models and planning assumptions are performed with timely lags of weeks, months or even years.

Combined mineralogical and chemical analyses on drill cores are highly demanded by mining and metallurgical companies to speed up exploration, mining and define geometallurgical parameters for beneficiation. Furthermore, high quality coherent and complete drill cores are needed to obtain reliable analyses for more accurate geomodels, resource and reserve estimates. At present, analyses are done by exploiting only a single technique, such as hyperspectral imaging, XRF or LIBS. The coupling of different analytical instruments is still a technological challenge. The SOLSA project, sponsored by the EU-H2020 Raw Material program, targets to construct an expert system coupling sonic drilling with XRF, XRD, hyperspectral imaging and Raman spectroscopy. This paper will present the 4-years project in progress, a general, almost mid-term, state-of-the-art.

The 42-month ¡VAMOS! project (Viable Alternative Mine Operating System, Grant Agreement 642477, vamos-project.eu), co-funded by the European Commission’s Horizon2020 programme, will enable access to reserves of mineral deposits by developing an innovative, safe, clean, and low-visibility underwater inland mining technique. Through field-testing, ¡VAMOS! hopes to encourage investment in abandoned and prospective EU open-pit mines by providing a viable novel excavation process, ultimately aiming to reduce the EU’s reliance on imports of strategically important raw materials. The project will test the technological and economic viability of the underwater mining of inland mineral deposits which are currently economically, technologically, and environmentally unobtainable. If proven viable, ¡VAMOS! will enable access to deposits whose excavation has been historically limited by stripping ratio and hydrological and geotechnical considerations. Also, due to low noise and dust levels, and its road-transportable electric-powered system, ¡VAMOS! will be able to be applied safely in both urban-proximal and hard-to-access rural locations. ¡VAMOS! is defined by a remotely-operated underwater mining vehicle, adapted and improved from existing subsea mining technology. Operating in tandem with a remote-controlled sensory assistance-vehicle, the underwater miner will connect to a flexible riser through which mined material will be pumped from the mudline to a land-based dewatering pit via a floating mobile deployment-platform. On the deployment platform, a bypass system will be linked to production measuring equipment and a laser-induced breakdown spectroscopy system, enabling throughput monitoring and real-time grade-control. Preparatory work has been carried out to assess the regulatory compliance of the project, its likely social and environmental impact, and the steps which need to be taken to reduce and quantify these during testing. Two community stakeholder workshops held in both England and Portugal have indicated that the public is receptive to the concept. Following an official project design-freeze in October 2016, construction and integration of all components will conclude in June 2017. This will be followed by field-testing at a flooded kaolin-granite quarry in Devon, England in October 2017, with further testing planned at a flooded iron mine in Vareš, Bosnia in June 2018.

UNEXMIN (Underwater Explorer for Flooded Mines, Grant Agreement No. 690008, www.unexmin.eu) is a project funded by the European Commission’s HORIZON2020 Framework Programme. The project is developing a multi-platform robotic system for the autonomous exploration and mapping of flooded underground mines. The robotic system – UX-1 – will use non-invasive methods for the 3D mapping of abandoned underground flooded mines, bringing new important geological data that currently cannot be obtained by other means without having significant costs and safety risks. The deployment of a multi-robotic system in a confined and unknown environment poses challenges to the autonomous operation of the robot, and there is a risk of damaging the equipment and the mine itself. Key challenges are related to 1) structural design for robustness and resilience, 2) localization, navigation and 3D mapping, 3) guidance, propulsion and control, 4) autonomous operation and supervision, 5) data processing, interpretation and evaluation. Underwater environments constrain basic robotic functions as well as the size and weight of any operable robot. The limiting factors in these environments influence the type and amount of equipment able to be mounted onto a robotic system. Crucial abilities for an underwater robot’s functionality include unobstructed movement, autonomy, mapping and environmental awareness. To enable these critical functions, we employ components such as cameras, SONAR, thrusters, structured-light laser scanners, and on-board computers, rechargeable batteries and protective pressure hulls. In UNEXMIN, additional underwater instrumentation is being developed to measure pH, pressure, temperature, water chemistry and conductivity, magnetic fields, and gamma radiation levels. An on-board geophysical system will enable sub-bottom profiling, and multispectral and UV fluorescence imaging units are being installed for mineralogical identification. All these tailor-made instruments are been tested in laboratory and real environment conditions.