Análise da mancha de inundação da Barragem Sul da Mina de Brucutu, São Gonçalo do Rio Abaixo, MG

Abstract

In recent years, Brazil has faced environmental and social disasters caused by mining tailings dams, largely due to the lack of control and the lack of inspection of these structures. Noteworthy are the catastrophes that occurred in the state of Minas Gerais, in the municipalities of Mariana (in 2015) and Brumadinho (in 2019), which generated greater concern about the stability of this type of structure. In this context, this study presents data from a simulation of rupture of the South Dam ofBrucutuMine,using the REC-HAS software and AutoCAD Civil 3D, in order to compare them with the data provided by the Emergency Action Plan for Dams Mining (PAEBM) of the company responsible forBrucutuMine. In order to carry out the calculations, a flood map was created and the data from the analyzed basin was exported to HEC-RAS. The breakout simulations provided approximate results to those provided by PAEBM. However, the fact that the time of formation of the rupture gap is included in the time of arrival of the rupture wave in the PAEBM, is very worrying, since it is difficult to estimate the exact beginning of the gap formation.