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The blasthole depth is the vertical distance from the bottom of the blasthole to the working surface.
The depth of the blasthole plays an important role in each blasting parameter. The depth of the blasthole not only affects the speed or strength of the work such as boring and mining, but also affects the blasting effect and material consumption. When the hole depth is increased, the time for rock drilling and rock loading increases, and the charging, ventilation and equipment time are correspondingly reduced. However, as the depth of the hole increases, the production of the blasting clip is increased, which is not conducive to obtaining a good blasting effect and increasing The consumption of explosives.