Mine planning - grade control tools
IMA Blast Hole Sampler-Analyzers collect samples and dense drill cuttings analysis data from blast holes. The real-time geochemical analysis data is used to make accurate blast field block models.
Relatively small block sizes like 2m*2m*2m can be used at ore-waste contact to pinpoint ore and waste location to avoid waste rock dilution. Improvement compared to conventional grade control can be easily demonstrated (see figure on the right).
Economic improvements, like +10% in mill head grade, is significant and can be calculated.
Today mines have no practical means to estimate ore losses in mining.
Accurate 3D model of the bench can be used to measure ore losses.
Not only the economic improvements can be reached, but sending
sulfidic ore or waste rock to inert waste area can be avoided. Mine planning tools can be used to make economic calculation (see figure on the right) and chemical analysis shows when waste can be send to inert waste area.