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Why should the blasthole be filled?
Hole filling is to make full use of the explosive energy, so that the ore can be blasted well. Filling is too short or not filled, it is easy to appear as a gun or cause the rock to scatter, and even the roots. If it is too long, the ore in the packing part will not be broken well, and it will be easy to appear large. In general, the packing length should not be less than the resistance line length. Mine tamponade generally uses a mixture of clay and sand (called gun mud) or rock powder produced by fine sand or rock drilling. However, sulfur-containing rock powder cannot be used as a filling. Water can be used as a filling in the vertical vertical blasthole. When the blasthole is filled, it should be ensured that the firewire or detonating cord and other equipment will not be injured. When filling, the filler can be lightly pressed with the gun stick, and the stuffing can only be tamped at the mouth of the gun. When water is used as the filling, the water column shall not be less than 1 m.