Abstract
This article is devoted to modelling of the extracted raw material removal from a mining area to the entry point for the next technological process. Two approaches were chosen for the process modelling. The first approach is regarded to traffic modelling by using available mathematical equations, based on capacity conversion and calculation of loading equipment efficiency. The second approach of modelling is computer simulation within the simulation system ExtendSim8. The modelling of the transport system and the determination of its efficiency were performed at the same conditions. The examined transport system was consisted of two lorries and one loader. The article presents the results of calculations and the results of simulation experiments, which also verified the results obtained by calculations. Calculations of the transport system performance and simulation experiments were performed for two time periods, for a time of 1 h and 6 h during a shift from three different loading places, which were 500, 1100 and 1450 m away from a place of unloading. The results obtained by both approaches are comparable. The main contribution, novelty, of this article is the modelling of the process in a quarry operation (loading and removal of mineral resources) not only on the basis of available mathematical formulas but also the application of simulation in the simulation tool EXTENDSim8, performing simulation experiments for specified conditions and their comparison with calculated values. Simulation is a suitable tool for determining and subsequently planning of the performance of both existing and projected transport systems.
Highlights
The essence of sustainable development is the efficient use of natural resources [1]
Modelling of the transport system performance was provided for these model conditions: for a loading device, which is used to load a quarry stone in a quarry after blasting; and for a lorry with a load capacity of 15.2 tons (8 m3), which is used to transport a quarry stone
This article describes to the determination of the transport system performance in a quarry operation
Summary
The essence of sustainable development is the efficient use of natural resources [1]. The mining and processing industry of raw materials contributes to a huge share in the national economy and delivers an invaluable resource for modern civilization [2]. Technological processes in the mining industry include various raw material transportation operations which consume significant amounts of energy and generate a substantial share of overall mining costs [3]. In addition to excavation, mining, processing and shipping, transport is the most important service process in both deep and surface mines. Existing transport methods that are feasible for deep mines include lorry transport, shaft systems, and belt conveyors [6,7]. Open pit mining consists primarily of the removal of topsoil and overburden, drilling and blasting of ore, and the transportation of material uses a system of excavators or conveyors and dump trucks [8]
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