Blast hole spaced charging device for engineering blasting

Abstract

The invention belongs to the technical field of blasting, and particularly relates to a blast hole spaced charging device for engineering blasting. The blast hole spaced charging device comprises a shell which is a sphere, the top of the shell is provided with a sealed chamber, a cylinder is mounted on the left inner wall of the sealed chamber, and the cylinder is connected with a cutter; one endof a trigger wire penetrates through the sealed chamber and extends into the shell, and the trigger wire is connected with a placing wire through an explosion-proof connecting box; a disc is horizontally arranged at the center position of the shell, piston holes are formed in the circumference of the disc, a groove is formed in the center of the upper surface of the disc and communicates with thepiston holes, and a gas releasing device is arranged in the groove; a piston and a piston rod are arranged in each piston hole, and supporting plates are connected with the piston rods and glued to the inner wall of the shell; and a sealing end cover is arranged on the upper surface of the shell, and an air guide hole is formed in the sealing end cover and is connected with the cylinder through anair pipe. The blast hole spaced charging device is mainly applicable to spacing of blast holes in open-air coal seams, and the condition that explosives are detonated can be effectively avoided, so that the safety of blasting is improved.

Description

technical field [0001] The invention belongs to the technical field of blasting, in particular to a blast hole spacer charge device for engineering blasting. Background technique [0002] Drilling and blasting is a common technology for stonework excavation, and it is widely used in water conservancy and hydropower, mining, transportation and other fields. The traditional continuous columnar charge has the disadvantages of large unit consumption, high detonation initial pressure, and excessive crushing of rocks, which makes the effective utilization rate of energy of explosives low, and is prone to produce large pieces and roots, causing blasting vibration hazards and many other problems. The air space charge technology can reduce the initial peak pressure of the explosive on the rock around the blasthole, and make the explosion pressure in the hole more uniformly distributed along the axial direction of the blasthole, thereby reducing or avoiding excessive crushing of the s...

AI Technical Summary

Problems solved by technology

However, the overall design of the bracket also needs to consider the shape and specification of the blast hole, which has a small scope of application and has certain limitations.

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