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What is the reason for the high output rate of large mines?
First, the minimum resistance line or hole spacing is too large, and the amount of explosives is insufficient.
Second, the blasthole is deep, the corresponding fan-shaped hole bottom distance is too large, and the hole diameter is the smallest, because the charge is insufficient.
Third, the drug density is small.
Fourth, the horizontal deep hole falling ore, due to the large free space, the ore gravity and the direction of the explosive force are consistent downward, and the caving ore is not fully affected by the blasting energy.
5. Deep hole deflection, deviating from the designed blasting parameter position;
Sixth, the blasthole is severely deformed, misplaced, bent, and blocked, etc., resulting in a serious shortage of charge.
7. In the ore body where the joint fissure is developed, when the second detonator is detonated, the medicine bag adjacent to the blasthole may fall off and the explosion may occur.