Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Bergbau"”.
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Nachhaltigkeit im Bergbau - Indikatoren und Beurteilungssystem
In the course of the development of the Report of the World Commission on Environment and Development (WCED) in the 1980ies an expression was introduced in the public discussion on environment and development that influenced the international and national policies of the last twenty years in all …
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Copper Metallurgy in Cilicia and the Amuq in the Second Millennium BC: Insights into Aspects of Bronze Age Technology and Trade
… spectrometry, at the laboratories of Deutsches Bergbau Museum in Bochum in Germany. The chemical analysis demonstrates a gradual shift from the arsenical-copper metallurgy to the use of tin-bronze through the second millennium BC, which correlates well with the general pattern in the …
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Hybrid Solving Techniques for Project Scheduling Problems
… fallen Net Present Value-Probleme, wie sie im Bergbau auftreten, und Labor-beschränkte Scheduling Probleme, wie sie in der chemischen Industrie auftreten. Abschließend nutzen wir das Konzept der Dantzig-Wolfe Dekomposition, um scharfe Schranken an die Optimallösung von Turnaround Scheduling …
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Grundlagenuntersuchungen zur elektrochemischen Remediation von schwermetallkontaminierten Boden- /Sediment- Wassersystemen am Beispiel von Uran, Chrom, Arsen und Chlorbenzen
… Die Gewinnung erfolgte durch konventionellen Bergbau, durch in- situ- oder offene Haufenlagerung. Die Urangewinnung auf dem Territorium der ehemaligen DDR wurde nach der Wiedervereinigung eingestellt und mit der Sanierung der Altstandorte begonnen. Nach Einstellung des Uranabbaus muss die …
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Hydrogeochemical and radiometric investigation of the uranium tailings Schneckenstein
The main goal of this thesis is the evaluation of the environmental contamination risk from the tailings materials. In order to achieve this task, hydrogeological, mineralogical, geochemical, hydrochemical, and isotope studies were conducted at the uranium tailings Schneckenstein. Four cores were …
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Evaluation of geological CO 2 storage involving adsorption on mining wastes from coal processing
The continuous increase of anthropogenic greenhouse gas emissions since the industrialization in the 18th century is a serious problem regarding the climate change. In order to reduce CO2 emissions, approaches for the improvement of power generation eciency and the implementation of CO2 capture at …
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Walzenlader-Strebbau-Simulation
This doctoral thesis deals with the recent development of a longwall simulation tool for analyzing shearer operations and estimating hourly and annual production output. In most cases longwall mining refers to underground coal extraction processes. Coal is mainly used for electricity and steel …
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Elektronische Ersatzteilkataloge in der Bergbauzulieferindustrie : Entwicklung einer Methode zur Einführung und Adaption von elektronischen Ersatzteilkatalog-Systemen bei KMUs des Sondermaschinen- und Anlagenbaus
In order to improve their service and to make their customers more successful, every company needed to increase ease of access to equipment information and empower customers to help themselves. With an electronic spare part catalogue-system equipment manufacturers and assemblers are able to rapidly …
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Geotechnische Modellvorstellungen zur Abschätzung von Gefährdungsbereichen des Altbergbaus und Schachtschutzbereichen im Aachener Steinkohlenrevier
Before industrial revolution in the 19th century, mining activity concentrated on near surface coal and ore deposits. In the hard coal mining district of Aachen in close vicinity of the river “Wurm”, near surface hard coal has been mined in an area of about 19 km². Shallow mining dates back to at …