Radial vacuum spaced charging device with active pressure relief

Abstract

The invention discloses a radial vacuum spaced charging device with active pressure relief, and the radial vacuum spaced charging device comprises an outer cavity (6). The radial vacuum spaced charging device is characterized in that a vacuum dielectric layer (5) is arranged between the outer cavity (6) and an inner cavity (4), both ends of the vacuum dielectric layer (5) are sealed by sealing plates (1), the inner cavity (4) is filled with explosives (3), and an air dielectric layer (2) is arranged above the explosives (3). According to the radial vacuum spaced charging device, the problem that an ideal blasting effect cannot be achieved due to great pulverization effect of rocks in a pulverization area, large early energy consumption and non-ideal effective utilization rate of explosive energy because the explosive energy cannot be effectively discharged in time after explosion due to narrow sealed space in a blast hole by utilizing water or air as spaced media in the prior art is solved.

Description

technical field [0001] The invention belongs to the blasting technology, in particular to a radial vacuum interval charge device for active pressure relief. Background technique [0002] In most of the blasting construction process, the charging methods in the blast hole are mainly continuous dense charging method and uncoupled charging method. Nowadays, the uncoupled charging method is mainly used in open-air blasting. In this method, the explosive will directly contact the hole wall of the blast hole. When the explosive in the blast hole explodes, the detonation pressure will increase sharply to tens of thousands of trillions Pa, and a shock wave is excited in the ore rock in the inner layer of the explosive, whose strength far exceeds the compressive strength of the rock. Under the strong impact of the detonation wave, the surrounding rocks will be crushed and destroyed to form a crushed zone, which will eventually lead to an increase in the proportion of powder after bl...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an active pressure-relieving radial vacuum spacer charging device to solve the problem that the prior art uses materials such as water or air as the spacer medium. Due to the narrow and airtight space in the blast hole, the energy of the explosives after explosion If it cannot be removed in time and effectively, the crushing effect of the rock in the crushing area is still relatively large, the initial energy consumption is very large, the effective utilization rate of explosive energy is not ideal, and the ideal blasting effect cannot be achieved, etc.

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