Must be performed by the control engineer or mining technician training through the use of explosives, Department of basic industries and mining, so that the sound from the explosion is in the standard criteria.
Be carried out by mining engineers or specialists trained in the use of explosives by the Department of Primary Industries and Mines, to the sound of an explosion within the standard.
Must be executed by mining engineer or the expert who have been trained in the use of explosives from the Department of primary industries and mines to the sound of the explosion was standard.