Open AccessThe mechanics of iron tailings from laboratory tests on reconstituted samples collected in post-mortem Dam I in Brumadinho
Author(s) -
António Viana da Fonseca,
Diana Cordeiro,
Fausto Molina-Gómez,
Davide Besenzon,
António Fonseca,
Cristiana Ferreira
Publication year - 2022
Publication title -
soils and rocks/soils and rocks
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.161
H-Index - 10
eISSN - 2675-5475
pISSN - 1980-9743
DOI - 10.28927/sr.2022.001122
Subject(s) - tailings , tailings dam , dam failure , geotechnical engineering , sampling (signal processing) , damages , engineering , laboratory test , forensic engineering , mining engineering , geology , civil engineering , geography , archaeology , metallurgy , law , materials science , electrical engineering , filter (signal processing) , political science , biochemical engineering , flood myth
Dam B1 was approximately 85 m high and 700 m long along the crown when it suddenly failed in 25th of January, after 41 years of operations and deposition of tailings at the Paraopeba mining complex (Côrrego de Feijão), in Minas Gerais, Brazil. More than 250 people died and vast economic, social and environmental damages resulted from the collapse. Given the need to geotechnically characterise the tailings within the dam for a credible computational model of the failure, an extensive sampling and laboratory testing campaign took place. The geotechnical laboratory of the Civil Engineering Department at the Faculty of Engineering of the University of Porto (Portugal) was invited by CIMNE, under a contract with VALE, with MPF agreement, to conduct this program. This paper will present a description of the sampling campaigns in the remaining post-mortem dam/reservoir tailings were the failure instability mechanics developed and the experimental program undertaken to test the tailings in advanced laboratory tests. The results that embrace evaluations of the physical, hydraulic and mechanical properties, deduced from integral samples selectively collected and prepared as described, which allowed to define the geotechnical parameters necessary for the referred analyses are here resumed.