Blast hole plugging device for large-hole statically crushed rock

Abstract

The invention provides a blast hole plugging device for large-hole statically crushed rock. The blast hole plugging device comprises an upper part used for shading a blast hole and a lower part which extends into the blast hole, multiple safety pin holes which penetrate through the upper part and the lower part are formed in the upper part and the lower part in the axial direction of the upper part and the lower part, and safety pins are inserted into the safety pin holes; and multiple firing pin cavities used for containing firing pins are formed in the lower portion in the radial direction of the lower part, a firing pin spring is arranged on the outer wall of each firing pin in a winding manner, and one end of each safety pin extends into the corresponding firing pin cavity to abut against the extending end of the corresponding firing pin and compress the corresponding firing pin spring. The blast hole plugging device is easy and convenient to operate and good in plugging effect, and therefore safety in the process of conducting large-hole static blasting is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a blasthole plugging device for statically crushing rocks with large apertures. Background technique [0002] Static blasting has the characteristics of no noise, no poisonous gas, no vibration, no flying rocks, etc., so this construction method has been widely used in some cases where the requirements for blasting disaster control are very strict. [0003] The principle of static blasting is that the static breaking agent reacts chemically with water, during which a large amount of heat is released and its volume expands rapidly. Generally speaking, under the condition of free expansion, the volume of the static breaking agent can increase by 2 to 4 times after fully hydrating. If it is packed in a closed blast hole, the volume expansion process will generate a lot of pressure on the blast hole, and when the pressure is greater than the strength of the surround...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a blast hole plugging device for static crushing of rocks with large aper

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