High-pressure-resistant energy-concentrated directional explosive charge, and use method thereof

Abstract

The invention discloses a high-pressure-resistant energy-concentrated directional explosive charge, and a use method thereof, and belongs to the technical field of diaphragm walls. The directional explosive charge comprises an explosive located in a blasting cartridge, an electric detonator, and a first sealing element and a second sealing element which carry out waterproof sealing on the two ends of the blasting cartridge separately, wherein the first sealing element comprises a cover plate matched with the blasting cartridge in diameter, a sealing rubber gasket located at the junction of the cover plate and the blasting cartridge, a first wiring terminal penetrating through a conductive wire used for connecting the electric detonator, of the cover plate, and transferring a current, and a fixing assembly connecting the cover plate and the sealing rubber gasket with the blasting cartridge; and the junction of the first wiring terminal and the cover plate is sealed. According to the directional explosive charge disclosed by the invention, the waterproof sealing is carried out on the blasting cartridge through the first sealing element and the second sealing element, mud or water cannot enter the storage position of the explosive, and the explosive can be fired by the detonator.

Description

technical field [0001] The invention relates to the technical field of anti-seepage walls, in particular to a high-pressure resistant energy-forming directional bomb and a method for using the same. Background technique [0002] In the construction of the anti-seepage wall, it is first necessary to continuously make holes in the loose permeable foundation to form slot holes, and then pour concrete into the slot holes to form a wall-shaped building that prevents leakage. In the stage of hole-making and slot-hole formation, if the content of boulders (boulders) in the formation is high, it will bring great difficulty to hole-making and slot formation. Therefore, directional blasting needs to be carried out with directional bombs to break the boulders. [0003] The currently used directional bombs use electric welding to weld steel plates at the bottom of the blasting cylinder, add explosives and electric detonators to the blasting cylinder, and then weld the steel plates above...

AI Technical Summary

Problems solved by technology

[0005] The method of closing the two ends of the blasting cylinder by electric welding and welding the steel plate cannot achieve effective sealing under high pressure. The pressure of the mud in the deep hole (more than 80m) is too high, and the mud or water will flow along the welding seam and the passage on the steel plate under high pressure. Holes etc. enter the blasting cylinder, so that the pressure inside the blasting cylinder is the same as the pressure of the external mud. Under higher pressure, the detonator cannot detonate the explosives.

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