A vacuum cartridge structure for active pressure relief and energy gathering in pre-splitting blasting and its preparation method

Abstract

The invention discloses a vacuum cartridge bag structure capable of initiatively releasing pressure and accumulating energy during pre-splitting blasting and a preparation method thereof. A first vacuum chamber and a second vacuum chamber are arranged inside a shell after being fixedly connected by a connecting plate; the center parts of the first vacuum chamber and the second vacuum chamber are explosive arranging spaces; the preparation method comprises the following steps: preparing the shell by using brown paper; fixedly connecting the first vacuum chamber and the second vacuum chamber by using the connecting plate; arranging the fixedly-connected first and second vacuum chambers in the shell; sealing one end of the shell; firstly putting detonators at the middle positions of the explosive arranging spaces; subsequently filling explosives into the explosive arranging spaces; leading out explosive leading wires after the explosives are completely filled; finally sealing the other end of the shell; marking a weak surface position on the shell. The vacuum cartridge bag structure disclosed by the invention can be used for solving the technical problems that in the prior art the space in a blast hole is narrow and closed and energy of the explosive cannot be effectively released in time after pre-splitting blasting so that a relatively high crushing effect on rock in a crushing area is played, energy in the initial stage of the pre-splitting blasting is quite large, energy accumulation effect is poor and the like.

Description

technical field [0001] The invention belongs to the pre-splitting blasting technology, in particular to a vacuum cartridge structure and a preparation method thereof for actively releasing pressure and gathering energy in pre-splitting blasting. Background technique [0002] During the construction process of pre-splitting blasting, the charging methods in the blast hole are mainly continuous dense charging method and uncoupled charging method. However, in order to achieve the effect of pre-splitting in blasting construction nowadays, uncoupled charge is often used. In this way, the explosive will not contact the wall of the blasthole. It is increased to tens of thousands of megapascals, and a shock wave is excited in the ore rock in the inner layer of the explosive, and its strength far exceeds the compressive strength of the rock. Because there is a weak surface in this charging method, under the strong impact of the detonation wave, the energy will act on the weak surfac...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a vacuum charge structure and its preparation method for actively releasing pressure and gathering energy in pre-splitting blasting, so as to solve the problem that the energy of explosives after pre-splitting explosion cannot Timely and effective removal, resulting in greater crushing of rocks in the crushing area, high energy in the initial stage of pre-splitting blasting, poor energy gathering effect and other technical problems

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