Estudo comparativo entre os métodos de decapeamento tradicional e wave com auxílio do software Dozsim®

Abstract

The stripping is one of the activities responsible for making the release of the lithological layer of bauxite. The deposits of bauxite, in tabular type, shows variations in its depth, thickness, slope, diving, etc., which often implies the change of the scene to be won by the stripping process. Thus, for each of these scenes, theoretically, there is a method of stripping ideal or best suited for that particular reality. This comparative study aims to examine some of the key parameters influencing the results of productivity and average transport distance in the process of stripping. There are several parameters, including: cutting angle of clay’s ramp insitu, angle of controlled waste deposit (CWD), the height of Belterra clay layer, the height of the digs newly opened, rain, etc. Tests were conducted in Juruti bauxite mine, belonging to ALUMINIUM COMPANY OF AMERICAN - ALCOA, and the data obtained were compared with the results from tests on other bauxite mine in western Pará State. Furthermore, previously, simulations were performed of the steps of stripping through DozSim software Caterpillar ® to subsequently perform analyzes between theoretical and practical data. The results showed that the height of clay is inversely proportional to bulldozer’s productivity and the height of the dig newly opened is directly proportional to bulldozer’s productivity. Was possible also to be noted, that for each environment there is an ideal method. Regarding the software, it serves as a reference for practical values and can be used as a practical efficiency factor, in other words, as close the practical values are of the simulated values as more efficient is the procedure.