Natural caves empirical stability assessments–four empirical methods application to caves in iron-rich lithologies
AQ de Paula, TR Corrêa, CS Sebastião, IV Brandi… - ISRM …, 2019 - onepetro.org
The Brazilian legislation concerning caves is very particular when compared to other
countries'. This law restrictions affect deeply the mining industry, blocking mines reserves …
countries'. This law restrictions affect deeply the mining industry, blocking mines reserves …