Device and method for rapid dust reduction during tunnel blasting

Abstract

The invention discloses a device for quick dust falling during tunnel detonating. The device comprises a tunnel excavation trolley and a mobile trolley. A water pipe is arranged on a tunnel face of the tunnel excavation trolley. The water pipe is provided with a nozzle I which is arranged in an H shape on the water pipe. One end of the water pipe is provided with a booster pump close to a water pipe connector. A mobile type water spraying device is arranged on the mobile trolley. The invention discloses a method for quick dust falling during tunnel detonating. According to the device and method for quick dust falling during tunnel detonating, through a water vapor atomization device on the trolley and the mobile type water spraying device on the mobile trolley, water mist and water vapor are used for carrying out quick dust falling on dust, dust falling time is shortened, the work progress is accelerated, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of using the wet method or the water spray method, and in particular relates to a device and method for quickly reducing dust during tunnel blasting. Background technique [0002] During the tunnel excavation construction, a large amount of dust will be generated, especially in the tunnel excavation process using the new Austrian method. The new Austrian method uses spray anchor support as the main means of construction, which can keep up with the excavation work surface construction to the maximum extent. Therefore, the time-space effect of the excavation construction surface can be used to limit the development of deformation before support, prevent the surrounding rock from entering a loose state, and advance support can be carried out if necessary, coupled with the early strength and comprehensive bonding of shotcrete Therefore, the timeliness and effectiveness of the support are ensured. Due to the basi...

AI Technical Summary

Problems solved by technology

[0002] During the tunnel excavation construction, a large amount of dust will be generated, especially in the tunnel excavation process using the new Austrian method. The new Austrian method uses spray anchor support as the main means of construction, which can keep up with the excavation work surface construction to the maximum extent. Therefore, the time-space effect of the excavation construction surface can be used to limit the development of deformation before support, prevent the surrounding rock from entering a loose state, and advance support can be carried out if necessary, coupled with the early strength and comprehensive bonding of shotcrete Therefore, the timeliness and effectiveness of the support are ensured. Due to the basic points of the new Austrian method of tunnel excavation "less disturbance, early spraying and anchoring, frequent measurement, and tight sealing", the spraying operation of the blasting or initial support of the face In this case, a large amount of dust will be generated in the adjacent area of ​​the working surface. In the existing construction technology, ventilation and dust reduction measures are often adopted. After ventilation, the light dust is easy to be discharged with the wind, and the heavy dust is easy to rotate on the working surface. It is easy to be discharged. After the ventilation stops, part of it will slowly fall on the ground or the palm surface, and the other part will still remain in the air. After workers enter, they will spray anchor or measure, and they will always bring up or inhale a certain amount of air when they breathe. Dust not only affects the work efficiency of workers, but also affects the health of workers. In addition, this process takes a long time to reduce dust and the dust is not completely removed, which is likely to affect the progress of the project.

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