Tunnel engineering mining method excavation blasting instantaneous dust fall process

Abstract

The invention discloses a tunnel engineering mining method excavation blasting instantaneous dust fall process. The tunnel engineering mining method excavation blasting instantaneous dust fall process is used for effectively utilizing blasting shock waves to form a high-density water mist closed area at the front end of a tunnel excavation face during mining method excavation blasting. The tunnel engineering mining method excavation blasting instantaneous dust fall process comprises the steps that after waterproof explosives and waterproof detonating detonators are installed on the tunnel excavation face, simple sleeve valve steel pipe mist spraying equipment is adopted in the range away from a dust dense area of a blasting face, spraying is carried out for more than 5 minutes, the water mist closed area is formed, then detonation blasting is carried out, high-speed vibration impact is carried out through the blasting shock waves, dust molecules and high-density water molecules move relatively at a high speed in the water mist closed area, mixed and dried dust particles rapidly absorb the water molecules in the water mist, the weight of the water molecules is sharply increased, the water molecules rapidly fall onto the ground, and the purpose of instantaneous dust removal is achieved. The tunnel engineering mining method excavation blasting instantaneous dust fall process effectively solves the problem that dust in tunnel engineering mining method excavation blasting is difficult to quickly eliminate.

Description

technical field [0001] The patent of the invention relates to a tunnel engineering mining method excavation blasting shock wave + spray sealing system closed instantaneous dust reduction process, especially suitable for long tunnels, tight construction schedules, and severe dust pollution caused by blasting operations near the excavation surface. The process has the advantages of simple equipment, easy operation, low cost, high dust removal efficiency, and short dust removal time. Background technique [0002] With the rapid development of my country's high-speed railway, there are more and more tunnel projects, and the work is done quickly. The length of the tunnel is long, the construction period is tight, and the excavation flour and dust are heavy. Relying on the traditional spray and air duct ventilation technology, the power consumption is large and the cost is high. , low benefit, long time-consuming, wide range of pollution, and unsatisfactory dust removal effect, the...

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Problems solved by technology

[0003] Aiming at the deficiencies in the above-mentioned prior art, the patent of the present invention provides an instantaneous dust reduction process suitable for large tunnel mining method with long blasting excavation length, tight construction period, and serious dust pollution of excavation after blasting excavation. It is used for Solve the problem of efficient and rapid dust removal in tunnel engineering mining blasting excavation

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