Loading ...Neil Ringdahl
@NeilRingdahl
Worlds biggest open pit blast.
11 million tonnes, 6,410 detonators, 51ha.
Sorry, Alex😉 but at least its still in Aus.
Fun Fact for non miners: The perimeter holes going off first is called the pre-split. The top of these holes are not blocked, increasing the blowout & reducing the shockwave (which breaks rock), instead creating a single crack or “split” between them. This split prevents the rock outside the blast perimeter defining the pit limit from being smashed by the shock from all the other blast holes. The reason for this is so that the walls of the pit do not get too fractured and present stability problems when the pit gets deeper.
Interesting
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