Direcionamento de drenagem como subsídio para planejamento de ações preventivas em cavas e pilhas

Abstract

This work aims to find practical and technological solutions aimed at reducing the geological risk concerning the superficial water flow in mining areas with open-pit mining, and also aims to define the flow direction and accumulation areas. The same was done in the municipality of Parauapebas, state of Pará, which is located in the Amazon region, and is a site of extensive mining activity, which demands great attention in relation to the loss of slope stability, mainly because it is a rainy region. As for the theoretical framework, we used Coelho (2008), Brandão (2009), Rennó (et al. 2008), O'Callaghan and Mark (1984), Tarboton (1997), among others. This work was carried out using automated techniques of direction analysis and flow accumulation, based on E-BEE drone type overfly data, processed in the Qgis free software. From these data, Digital Terrain Models were generated, and the D-8 algorithm methods produced by O'Callaghan and Mark (1984) and D-Infinity (Multiple Flow Direction Method) produced by Tarboton (1997). After analyzing the images and comparing the results, D-infinity method was more efficient because the results were more consistent with what was seen in the field and the flow direction results were more accurate and defined.