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The basic requirements for open mining for blasting work are:
First, there is enough blasting stock to ensure the continuous operation of the loading and unloading work.
Second, there must be reasonable ore rock mass, and the blockiness after blasting should meet the block requirements of subsequent work.
Third, there must be a regular explosion and steps, the explosion is too high, it will affect the safe operation of the excavator; the explosion is too low, affecting the efficiency of the installation, the explosion before the explosion is too large, so that the amount of cleaning is increased, the transportation line Also affected, the former rushing too small, indicating that the ore is not good. Therefore, the height and width of the pile should be appropriate. After the blasting, the working surface of the step should also be regular, and it is not allowed to have unevenness such as roots and umbrellas.
Fourth, we must be safe and economic. In the blasting design, the damage of the surrounding equipment, personnel and buildings should be fully considered to ensure the safety of the operation and the blasting should be economical and reasonable.