Análise de estabilidade de taludes em solos de alteração de rochas metamórficas do Quadrilátero Ferrífero / Slope stability analysis in soils of alteration of metamorfic rocks of Quadrilátero Ferrífero

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The present work has the aim of improve the knowledge on the mechanical behavior of several materials occurring in the slopes of the Pico mine, in Quadrilátero Ferrífero area, Minas Gerais State. Triaxiais tests and direct shear tests of undisturbed samples collected in situ were performed in order to obtain strength parameters under several loading conditions. Direct shear tests also were performed in order to characterize the influence of rock schystosity and scale effect on the results of the shear strength parameters. Results obtained show that schystosity affects the value of those parameters, while the size of samples tested did not significantly affect strength, for the same loading conditions. Calculated values for cohesion and friction angle were used in mining slope stability studies using both deterministic and probabilistic approaches for two commercial softwares: SLOPE/W AND SLIDE. The results showed that the values obtained for deterministic factors of safety were quite close and the calculated probabilities of slope failure were small. The use of shear strength parameters was done as a basis to future studies proposed to allow a better understanding of their influence on the geological-geotechnical behavior of other materials occurring on the slopes of the Mina do Pico. These studies will be used to define the final pit of Pico mine.

ASSUNTO(S)

taludes slope stability laboratory testing ensaios de laboratório filitos geotecnica

ACESSO AO ARTIGO

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