On-site explosive mixture automatic charging and safe detonating device and a charging and detonating method

Abstract

The invention discloses an on-site explosive mixture automatic charging and safe detonating device and a charging and detonating method. The on-site explosive mixture automatic charging and safe detonating device comprises a safety protection main body, a detonating cord and a detonator. A detonating cord mounting chamber and a detonator mounting chamber are arranged in the safety protection main body, and a detonator lead hole communicated with the detonator mounting chamber is formed in the side face of the safety protection main body. The detonating cord is arranged in the detonating cord mounting chamber, and the tail part of the detonating cord extends out of the rear end of the safety protection main body. The detonator is mounted in the detonator mounting chamber and is in compression connection with the detonating cord, and a detonator lead penetrates out of the detonator lead hole. The tail end of the safety protection main body is provided with an elastically telescopic reducing tail pipe, and the front end of the safety protection main body is provided with an exhaust hole. During charging, the safety protection main body is connected to the front end of an automatic charging pipe through the reducing tail pipe. According to the on-site explosive mixture automatic charging and safe detonating device and the charging and detonating method, friction between the detonating cord and the inner wall of a blast hole can be eradicated during charging, the detonator is prevented from colliding with rock at the bottom of the hole or on the wall of the hole, and potential safety hazards during automatic charging are thoroughly eliminated; and charging is accurate, effective contact with explosives can be achieved, and safe and reliable detonation of the explosives is guaranteed.

Description

technical field [0001] The invention relates to the technical field of blasting engineering, in particular to an on-site mixed explosive automatic charging safety detonation device and a loading and detonation method. Background technique [0002] With the continuous development of engineering blasting technology, blasting technology is constantly improving, and the application of on-site mixed explosive automatic charging equipment is also becoming more and more extensive. When explosives are mixed and loaded automatically at the blasting site, in order to ensure reliable detonation of the explosives loaded in the blastholes, it is usually necessary to load detonating cords and tube mines into each blasthole to detonate the explosives. [0003] When using the existing on-site mixed explosive automatic charging device for charging, since the existing detonating cord is usually exposed and bundled with the tube mine, the tube mine and the detonating cord are pushed against th...

AI Technical Summary

Problems solved by technology

[0003] When using the existing on-site mixed explosive automatic charging device for charging, since the existing detonating cord is usually exposed and bundled with the tube mine, the tube mine and the detonating cord are pushed against the bottom of the automatic charging device during charging. The front end of the charge tube is sent into the blast hole. During the feeding process, the detonating cord and the inner wall of the blast hole will constantly rub against each other. The friction will cause the temperature of the detonating cord to rise, and the detonator and the rock at the bottom of the hole or on the wall of the hole will easily break out during charging. Impact, there is a safety hazard that the detonating cord or detonator is easy to be ignited, causing the explosive to explode in advance, or the detonating cord may be damaged or broken due to friction, resulting in weakening of the detonating effect of the detonating cord, affecting the reliable detonation of the explosives loaded in the blasthole

To solve this problem, there is a lack of reliable technical means and equipment in the existing technology, and its safety hazards cannot be ruled out. We can only reduce the charging speed to reduce friction and temperature rise, and reducing the charging speed affects the charging efficiency of explosives, which is an urgent need in the engineering blasting industry. solved problem

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