Tobias Braun

Untersuchungen zur Betriebsstruktur deutscher Natursteintagebaue

ZusammenfassungDie Quantifizierung der Anwendungspotenziale für unterschiedliche Transporttechnologien in deutschen Natursteintagebauen ist Gegenstand eines Forschungsprojektes an der RWTH Aachen. Im Zuge dieses Projektes fand eine eingehende Analyse des entsprechenden Anwendungsbereiches statt. Im vorliegenden Beitrag wird auf Basis der Analyseergebnisse die allgemeine Struktur der Gewinnungsbetriebe für gebrochene Festgesteine in Deutschland dargestellt. Neben der Untersuchung verschiedener Parameter der Tagebaue wie Fördertonnage, beanspruchte Tagebaufläche und Art des gewonnen Gesteins wird vorgestellt, welche Abbaumethoden angewendet werden und welche Betriebsmittel in welcher Kombination für verschiedene Prozessschritte eingesetzt werden. In diesem Zusammenhang wurden mithilfe verschiedener Erfassungsmethoden ca. 450 Natursteintagebaue untersucht und die gesammelten Daten entsprechend ausgewertet. Es wird deutlich, dass die Einsatzbedingungen innerhalb des Betrachtungsbereiches stark differieren und dennoch ein monotoner Technologieeinsatz praktiziert wird.AbstractThe quantification of the application potential of different transport technologies in German quarries is topic of a research project at the RWTH Aachen University. In the course of this project an in-depth analysis of the respective applications took place. This paper presents the general structure of mining operations for aggregates in Germany. Various parameters of open pit mines such as conveying tonnage, claimed open pit mine areas and the rock type are presented together with the mining methods and the equipment applied for the different process steps. In this context, approximately 450 quarries were analyzed, using different assessment methods, and the collected data were evaluated. It becomes obvious that the investigated operating conditions are very different. Nevertheless, the same production technology is used throughout the industry.

Analysis-Specific Standardization of Quarries to Determine the Potential for the Application of Belt Conveyor Systems

With a yearly power consumption of about 1,700,000 MWh, the quarry industry appears to be one of the most energy-intensive sectors among German industries. In-pit transport operations require approx. 40% of the entire power demand, generating some 50% of the total mining costs. To date haulage is mostly done by mine trucks, driven by diesel engines with a total annual fuel consumption of 68 million liters, emitting an equivalent of 208,000 tons of carbon dioxide. Substitution of the mine trucks by establishing belt conveyors will on the one hand significantly reduce the emissions, and on the other increase energy efficiency in in-pit transportation. As every open pit requires a specific approach in order to find a suitable conveying system, a standardized analysis is not possible. In order to achieve a differentiated statement on the suitability of continuous conveyors according to various structural properties, a classification and standardization of quarries with similar transport parameters has been established. An individual scheduling of conveying and machine usage in the different types of quarries will allow a comparison of optimized constellations of the different haulage systems within the respective field of application, in order to quantify and compare ecological and economical aspects among the haulage systems.