Análise comparativa entre caminhões fora de estrada na mineração: através de indicadores de desempenho

Abstract

In the open pit mining exploration, the ore transport operation inside de mine it is considered one of the most important activities on the process, being responsible for a large part of the total costs of mining. With this, this work demonstrates a comparison study between two off-road trucks with diesel-electric and mechanical traction system through their maintenance and operation performance indicators, helping to make decisions in the most efficient equipment for the company. The trucks are compared in the same range of operational life and operating conditions, and are located in a mine in Minas Gerais. The data used for the construction of the indicators are obtained through the truck monitoring system, the maintenance records and the manufacturers' specialists. The comparison of the indicators shows a similar tendency in the behavior in the graphical curves, indicating that the trucks were compared under the same operating conditions. The trucks from Fleet A presented a low cost per ton produced, high productivity, greater mechanical efficiency of the components and are more agile in their operation, these trucks showed to be the most aligned with the company strategy. The Fleet B showed to be less effective mechanically and appeared to be a little bit more complicated to be operated, but it has a lower cost of parts for maintenance. The work showed that there is an opportunity improve to the performance of Fleet A, with conducting training to contribute with the experience or reviewing current procedures adopted by the maintenance area, for a reduction of the times of maintenance of the trucks. Another opportunity of improvement it is to have a good relationship with the manufacturers, to reduce the lead time of replacement of spare parts and in the reduction in the cost of pieces.