Avaliação de três cenários operacionais no decapeamento da lavra de bauxita de Paragominas – PA

Abstract

Studies directed the withdrawal, loading and transportation of waste in Paragominas Bauxite Mine since its early mining operations are frequent in 2007, aiming to increase productivity and reduce cost as the stripping operation is to cost more high project. In this sense this paper aimed to present clearly the economic analysis of the three scenarios, through the comparative cost of the three methods used to determined the stripping of overburden layer height and ranges from 25 m wide by 200 m long. Due to the high thickness of overburden that varies from 2 to 20 m depth, the focus of the study was to stands 13 m above scenario III, using a Liebherr 994 hydraulic excavator and trucks CAT 777F, showed up clearly indispensable for their application in the stripping benches above 13 m, and the use of large excavator Hitachi tipping removing the final layer. Every execution of methods will be based on meeting the criteria of safety, well being operational. Some factors can decrease productivity as: lack of education of the operator, the lack of maintenance of access roads and equipment. This work besides evaluating the costs of the methods, was used to correct some mistakes operational stripping the MBP, and as a suggestion for future work, the development of a linear programming, integrating with the dispatch system used in SMART MINE Mine.