Brazilian banded iron formations: a geological and geotechnical characterisation from hard and fresh to weak and completely weathered rocks

Teofilo Vieira da Costa

doi:10.26182/e8hy-e863

Brazilian banded iron formations: a geological and geotechnical characterisation from hard and fresh to weak and completely weathered rocks

Teofilo Vieira da Costa

School of Engineering

Research output: Thesis › Doctoral Thesis

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Abstract

This involved a comprehensive study of the dominant banded iron formations units that cover 15 of the Vale iron ore mining projects in Brazil. The study comprised laboratory testing and petrophysical determination of proprieties of the different weathering horizons. Relationships were established between the petrophysical, rock strength and elastic arameters. The work concluded that each weathering horizon could be represented by typical parameters that can define a specific geomechanical behaviour, principally controlled by the iron content/bulk density, total porosity/permeability, and the mineral composition/band thickness. Ultimately, these parameters control the slope stability from shallow to deep iron ore mines.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Dight, Phil, Supervisor Marques, Eduardo Antônio Gomes, Supervisor, External person Mercer, Ken, Supervisor
Award date	18 Oct 2021
DOIs	https://doi.org/10.26182/e8hy-e863
Publication status	Unpublished - 2021

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10.26182/e8hy-e863

THESIS - DOCTOR OF PHILOSOPHY - VIEIRA DA COSTA, Teofilo Aquino - 2021
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Cite this

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title = "Brazilian banded iron formations: a geological and geotechnical characterisation from hard and fresh to weak and completely weathered rocks",

abstract = "This involved a comprehensive study of the dominant banded iron formations units that cover 15 of the Vale iron ore mining projects in Brazil. The study comprised laboratory testing and petrophysical determination of proprieties of the different weathering horizons. Relationships were established between the petrophysical, rock strength and elastic arameters. The work concluded that each weathering horizon could be represented by typical parameters that can define a specific geomechanical behaviour, principally controlled by the iron content/bulk density, total porosity/permeability, and the mineral composition/band thickness. Ultimately, these parameters control the slope stability from shallow to deep iron ore mines.",

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AU - Vieira da Costa, Teofilo

PY - 2021

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AB - This involved a comprehensive study of the dominant banded iron formations units that cover 15 of the Vale iron ore mining projects in Brazil. The study comprised laboratory testing and petrophysical determination of proprieties of the different weathering horizons. Relationships were established between the petrophysical, rock strength and elastic arameters. The work concluded that each weathering horizon could be represented by typical parameters that can define a specific geomechanical behaviour, principally controlled by the iron content/bulk density, total porosity/permeability, and the mineral composition/band thickness. Ultimately, these parameters control the slope stability from shallow to deep iron ore mines.

KW - iron ore

KW - banded iron formatins

KW - strength and elastic parameters

KW - weak materials

KW - weathering profile

KW - geological features

KW - intact rock

KW - empirical correlations

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DO - 10.26182/e8hy-e863

M3 - Doctoral Thesis

ER -

Brazilian banded iron formations: a geological and geotechnical characterisation from hard and fresh to weak and completely weathered rocks

Abstract

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