Tunnel smooth blasting structure and blasting method

Abstract

The invention provides a tunnel smooth blasting structure and blasting method. The structure comprises a cannon body. A cannon head is mounted at the bottom end of the cannon body. A clamp plate is welded to the side face of the cannon head. A control mechanism is fixedly mounted at the top end of the cannon body and comprises a barrel. The bottom of the barrel is fixedly connected with the bottomof the cannon body, and an electronic signboard is fixedly mounted on the front face of the barrel. A gunpowder layer is arranged on the inner side of the bottom of the cannon body. The gunpowder layer, a buffer layer and a stemming layer are sequentially arranged on the inner side of the cannon body from top to bottom, and the buffer layer can absorb impact force generated by exploding of the gunpowder layer. A dampproof layer arranged on the inner side of the cannon body can avoid the situation that the gunpowder layer is affected with damp, and consequently blasting fails. The electronic signboard is mounted on the front face of the barrel mounted at the top of the cannon body, and workers can insert detonators into blast holes conveniently. Through a delayer and a buzzer mounted on the two sides of the barrel, the delayer can carry out delayed detonation on a blasting guide block, the buzzer can produce harsh sounds, and the situation that harm is generated due to the fact that strangers break in by mistake is avoided.

Description

technical field [0001] The invention belongs to the technical field of tunnel smooth blasting, in particular to a tunnel smooth blasting structure and a blasting method. Background technique [0002] Tunnels and underground works play an important role in the construction of the national economy. Tunnel blasting refers to that when building a tunnel, soil or rock is drilled and then blasted with explosives to loosen, and then the mountain or stratum is broken and excavated. And transport the ballast project. It is widely used in the construction of water diversion, discharge, diversion, traffic and other tunnels in water conservancy projects. [0003] According to publication number CN201920595608.1, a blasting structure pre-embedded device for construction blasting with a high smooth blasting rate includes pre-embedded blocks, pre-embedded holes, pipe sleeves, moisture absorbing layers, bottom covers, gunpowder, sealing rings, inserts , cover block, detonating wire, limit...

AI Technical Summary

Problems solved by technology

[0003] According to the publication number CN201920595608.1, a blasting structure pre-embedded device for construction blasting with high smooth surface blasting rate, including pre-embedded blocks, pre-embedded holes, pipe sleeves, moisture-absorbing layers, bottom covers, gunpowder, sealing rings, and inserting blocks , cover block, detonating wire, limit block and detonating pin, the top of the embedded block is provided with a pre-embedded hole, the inside of the pre-embedded hole is inserted with a pipe sleeve, and the inner wall of the pipe sleeve is provided with a moisture-absorbing layer, the inner bottom wall of the pre-embedded block is fixedly connected with a bottom cover, the top of the bottom cover is filled with gunpowder, the top of the pipe sleeve is fixedly connected with a sealing ring, and the inside of the sealing ring is inserted with an insert block , the top of the insert block is fixedly connected with a cover block, the inside of the cover block is plugged with a detonating wire, the outside of the detonating wire is fixedly connected with a limit block in contact with the cover block, the bottom of the detonating wire The end is fixedly connected with a detonating pin. Although the blasting structure is provided with a moisture-absorbing layer on the inner wall of the pipe sleeve, the moisture-absorbing layer made of water-absorbing resin can absorb the moisture in the air or gunpowder, reducing the possibility of the gunpowder being damp. It is made of aluminum or steel. When the tube sleeve explodes, it can enhance the explosion effect and make the explosion conduction faster. The thinner bottom cover makes the explosion easier to conduct. The sealing ring reduces internal and external interaction, realizes the purpose of more stable pre-embedding, and avoids detonation errors, but the blasting effect of the existing smooth blasting structure is unstable

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