Empilhamento de rejeito arenoso filtrado: comparação entre técnicas de compactação com trator de esteira e rolo compactador

Abstract

This final paper investigates the stacking of filtered sandy tailings, comparing two distinct compaction techniques: bulldozer compaction and roller compactor. The mining industry, a significant economic driver, contributes to the development of nations but also generates large volumes of waste that require proper disposal to mitigate environmental and social risks. Focusing on dry stacking techniques, this study explores compaction methodologies aimed at increasing the stability of waste piles while reducing environmental impact, using filtered waste materials. Fieldwork was conducted by subdividing a test yard and performing density and compaction degree sampling of tailings layers at both the base and top levels. The research considered operational costs, productivity, and uniformity of results for both methods. Findings indicate that the roller compactor provides higher efficiency in terms of cost and density in certain points, though with greater variability, while the bulldozer offers more uniform compaction but with less intensity. The study concludes that both techniques have specific advantages and drawbacks, and that the choice of method should take into account soil characteristics, type of waste, and stability objectives. This research contributes to the optimization of tailings disposal, providing technical data to aid decision-making in geotechnical and environmental engineering projects.