RC Grade Control Drilling (in-pit grade control) is used in open-cut mines to define ore grades and also provide knowledge for mine planning and blasting.
RC/GC is typically drilled to optimal depths of 48 meters using hole Ø 125-140mm.
This information is critical to reduce waste rock (dilution) in concentrator feed as dilution can vary greatly. RC grade control is the most cost-effective and accurate way to define boundaries between waste rock and ore bodies.
