Filling method for primary explosive of blasting upward hole mixed explosive

Abstract

The invention belongs to the technical field of blasting, and relates to a filling method for the primary explosive of a blasting upward hole mixed explosive. The method comprises the following specific steps that: S1, a column explosive serves the primary explosive, and the bottom end of the column explosive is cut before explosive charging; S2, the column explosive is manually filled to the bottom of a blast hole, the column explosive is prevented from sliding towards the hole opening of the blast hole under the influence of self weight by means of the viscosity of the broken bottom end of the column explosive, and the column explosive is filled into an explosive tube so as to be poked tightly; S3, the mixed explosive is mechanically filled, the mixed explosive is completely coupled with the hole wall of the blast hole through continuous filling, the mixed explosive is not affected by the self weight of the initiating explosive, the mixed explosive is completely bonded with the hole wall of the blast hole after being foamed, excessive explosive returning can be avoided, and the blast hole is blocked; and S4, while the mixed explosive is mechanically loaded, an explosive loading tube is withdrawn at a constant speed. According to the method, the problem of explosive returning in the explosive charging process and after explosive charging is solved, the blasting explosive charging quality is ensured; the application effect of the method in a blast hole with the inclination angle being 60 degrees or above is extremely obvious, and particularly in a vertical hole of a cutting groove, and the explosive returning problem is solved.

Description

technical field [0001] The invention relates to the technical field of blasting, in particular to a method for filling explosive priming charges in blasting upward holes. Background technique [0002] Open-pit mining operations mainly include the processes of perforation, blasting, mining, transportation, and soil dumping, while blasting uses the compression, loosening, destruction, throwing, and killing effects of explosives in air, water, earth-rock media, or objects to achieve A technique for its intended purpose. When the explosive package or charge explodes in the earth-rock medium or structure, the earth-rock medium or structure will be compressed, deformed, destroyed, loosened and thrown. It is mainly used for earthwork engineering, and the demolition of metal buildings and structures, etc.; By using mixed explosives to fill the blast hole, the detonating bombs are sent into the hole at the same time, and the reverse detonation is carried out at the bottom of the bla...

AI Technical Summary

Problems solved by technology

Moreover, there is gravitational potential energy at the bottom of the hole where the detonating bomb is arranged; when the charge tube transports the mixed charge in the hole, the unfoamed mixed charge cannot be completely bonded to the hole wall, and is affected by the self-weight of the detonating bomb, and all of it returns out of the hole

Mixed explosives are more difficult to reload

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