Blasting method capable of improving step deep-hole blasting quality by using auxiliary blasthole
The invention belongs to the technical field of blasting methods, and particularly relates to a blasting method capable of improving step deep-hole blasting quality by using an auxiliary blasthole, which comprises the following steps: determining the auxiliary blasthole, determining the depth of the...
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Sprache: | eng |
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Zusammenfassung: | The invention belongs to the technical field of blasting methods, and particularly relates to a blasting method capable of improving step deep-hole blasting quality by using an auxiliary blasthole, which comprises the following steps: determining the auxiliary blasthole, determining the depth of the auxiliary blasthole, selecting different explosives for the blasthole, and determining the detonation mode. The auxiliary blasthole 2 is arranged between the deep-hole blastholes, thereby solving the problem of overhigh bulk rate on the step upper part due to the overhigh blasthole blockage length, overlow charging center of gravity and other conditions in production. The vertical blasthole-oblique blasthole combination mode is adopted to effectively improve the blasting quality on the premise of not influencing the perforation-blasting combined efficiency. According to the principle that the diameter of the blasthole should be approximate to or slightly greater than the limit diameter of the explosive, different explosives are selected for the auxiliary blasthole 2 and main blasthole 1, thereby creating ideal detonation conditions for the explosives and enhancing the energy utilization efficiency of the explosives. |
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