Harlsan > Drilling Program Drilling Program – Grade Control Reverse Circulation is the most commonly used drilling method for grade control in open pit mining operations. Grade control is used to define the ore grades and ore blocks in the pit and also...
Harlsan > Drilling Program Drilling Program – Exploration Reverse Circulation is used in drilling programs for initial exploration & also for resource definition. There are two types of RC drilling. One is RC with hammer, used in medium and hard rock that...
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