1. School of Mines, Federal University of Ouro Preto, Ouro Preto, Brazil
2. Ferrous Department, Vale S.A, Nova Lima, Brazil
3. Research Fellow, Fukada Geological Institute, Tokyo, Japan
4. Metals Strategy Department, Japan Oil, Gas and Metals National Corporation, Tokyo, Japan
5. Mining, Vale Technological Institute, Ouro Preto, Brazil
6. Australia Center for Geomechanics, Australian Center for Geomechanics, the University of Western Australia, Perth, Australia
7. Civil and Environmental Engineering Department, University of Brasília, Brasília, Brazil
8. Logging and Drilling Department, Geosol S.A, Belo Horizonte, Brazil