How are sulfide nickel deposits mined?

Sulfide nickel deposits are typically mined using underground techniques, similar to the methods used for copper mining. While underground extraction is the standard approach, some deposits have been mined using open-pit methods during their early stages.1

The selection of a specific underground mining method depends on several factors, including the size, shape, and orientation of the ore body, the grade of the mineralization, the strength of the surrounding rock, and the depth of the deposit. Because underground mining involves higher costs and more limited access compared to surface operations, the chosen technique must balance productivity with the need to minimize the mixing of ore and waste.2