Economic aspects of the maintenance of auxiliary mechanization

Abstract

The maintenance of auxiliary mechanization, in respect of dynamics and content of conducting procedures of preventive maintenance, should be very carefully apportioned and strictly adjusted to the real needs, because, in the contrary, some opposite effects may appear and significantly reduce reliability and effectiveness of auxiliary mechanization, with a considerable increase in expenses. Maintenance models are based on reliability parameters and optimization criteria of, most frequently, minimal costs and maximal readiness or are based on their compromises. Operation costs are in direct dependency on the selection of equipment for concrete conditions in open-pit working environment and engaged equipment production capacity. The economic demands assume that, while constructing and exploitation of the machine, the amount of the used material should be as little as possible, as well as that of work and time in relation to the unit of product, i.e. production during the exploitation period of the machine in service. This paper presents software for controlling the efficiency parameters of auxiliary mechanization at lignite Openpits in Serbia, i.e. the part which controls economic aspects and costs of maintenance. This software is developed to process data from three largest open-pits in Serbia: Kolubara, Kostolac and Kosovo. The software is tested in practice at big open pit and can be used in design of future open pits.