A method for loading explosives in deep hole loosening blasting

Abstract

A method and apparatus for char explosives in deep-hole loose blasting are disclose, the explosive is tightly fixed in the detonator, and the detonator is installed by the method of forward blasting,The detonator gun line is led out from the skylight of the blasting cylinder, and the blasting cylinder and the powder feeding rod cooperate with each other, so that the explosive is convenient and concise to move in the bore hole. By observing the scale on the powder feeding rod and the mark on the soft rope, the explosive feeding situation in the bore hole can be detected at any time outside thebore hole, so as to ensure that the explosive can be sent into the designated position; The soft rope in front of the detonator is convenient to take the explosive out of the drill hole when the squib or the detonator is placed in the wrong position, which improves the fault tolerance rate in the loosening process and reduces the negative influence of the explosive in the use process. The separable design of charge feeding rod and detonation cylinder enables the charge feeding rod to be recovered after the completion of charge feeding, which greatly reduces the material use cost of loose blasting.

Description

technical field [0001] The invention relates to a method for deep hole blasting, in particular to a method and device for loading explosives in deep hole loosening blasting, and belongs to the field of blasting technology. Background technique [0002] Loosening blasting technology is a blasting technology adopted in coal roadway excavation of outburst coal seam. When the explosive explodes, the rock mass is broken and loosened but not thrown, forcing the coal body to create cracks to release stress and gas, so as to improve the air permeability of the coal seam and prevent outburst. For the purpose of loose blasting, the explosion piles of loose blasting are relatively concentrated, and the damage range to the unexploded parts around the blasting area is small. By loosening and blasting the coal seam, a large number of penetrating cracks will be generated in the coal body, the air permeability of the coal seam will be improved, and the stress concentration in the coal seam ...

AI Technical Summary

Problems solved by technology

[0003] Existing loosening blasting technology mostly uses PVC pipes as the filling chambers of explosive rolls and uses yellow mud for sealing, and subsequent feeding uses PVC empty pipes with a length of about 1m for docking and delivery. Arrived at the predetermined location, but due to the rough wall of the hole, the high quality of the gun barrel, and the brittle material of the PVC pipe, the barrel often breaks during the transportation process, and the delivery rods are embedded in each other, resulting in dumb guns, wrong positions of the guns, The detonation effect is poor; and after the squib, because the PVC pipe is single-segmented, the squib can not be recovered quickly, and the PVC pipe sent in cannot be used again, resulting in high danger of the squib and high cost of detonation

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