Blasting cutting device with composite charging structure and construction method of blasting cutting device

Abstract

The invention discloses a blasting cutting device with a composite charging structure and a construction method of the blasting cutting device. The blasting cutting device is composed of a shaped blasting tube, a tail connector, explosives, a detonating cord and a reverse detonating cartridge, wherein the shaped blasting tube comprises an explosive groove with a horn-shaped groove and an outer buckling explosive groove cover; a tube is filled with the explosives and is provided with the detonating cord; the reverse detonating cartridge can be connected with the tail of the tube through the tail connector, and therefore the blasting cutting device is formed; and the blasting cutting device is fixed in a blasting hole by a positioning block. According to the horn-shaped groove in the shapedexplosive tube, the charging structure of the horn-shaped groove can generate higher jet velocity than the charging structure of a cone-angle-shaped groove, and the cutting ability on rock mass is higher. The shaped blasting tube has two types including a common type and a reinforced type. A groove of the common type shaped blasting tube is an opening, a groove notch of the reinforced type shapedblasting tube is closed, a shaped cavity is formed in the groove, on the one hand, the rigidity of the structure can be enhanced, on the other hand, after water is injected into the shaped cavity, high-pressure jet water can be generated during blasting to form a water jet, the cutting ability on the rock mass can be enhanced, and the generated water mist can further play a role in dust removal.

Description

technical field [0001] The invention relates to the application field of a smooth blasting charge structure for rock tunnels or rock slopes, in particular to a blasting cutting device and a construction method of a composite charge structure. Background technique [0002] Smooth surface blasting is a controlled blasting technology that achieves the smooth surface of the blasting surface and conforms to the design requirements through the correct selection of blasting parameters, charge structure, blasting network and reasonable construction methods. The basic principle of smooth blasting is to control the blasting effect of explosives, so that the form of violent work is more converted into the form of explosive work, and the initial impulse of explosive explosion is reduced, thereby reducing the damage to the rock mass of the blasthole wall and controlling the blasting cracks. develop in the expected direction. [0003] Concentrated smooth surface blasting uses the Monroe ...

AI Technical Summary

Problems solved by technology

In the charge structure with grooves, the charge structure with cone-shaped grooves is mainly used at present. When the charge is fixed, the jet velocity generated by it is much smaller than that of the charge structure with trumpet-shaped grooves. Therefore, there is still room for improving the energy efficiency of smooth blasting

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