Reverse rotational flow air field-division ventilation and dust control method and system for fully-mechanized excavation face

Abstract

The invention provides a reverse rotational flow air field-division ventilation and dust control method and system for a fully-mechanized excavation face. A reverse rotational flow air is formed under the guidance of a curved-surface flow guide plate through a radial air injection opening and a flow guide mechanism for providing fresh and pollution-free air for operation areas except the head-on area, under the combined action of a compressed air high-speed jet flow field and radial air flow, transverse vortexes are formed within the range of 5-8 meters away from the head-on head, the transverse vortex field seals the head-on high-concentration dust in the area, and finally the dust is completely sucked away and purified through an air draft barrel, and in addition, the invention provides the system for implementing the method. According to the reverse rotational flow air field-division ventilation and dust control method and system for the fully-mechanized excavation face, most of air flow moves towards the rear portion of a roadway and forms reverse rotational flow air, the direction of the rotational flow air gradually points to the rear portion of the roadway, a large amount of stable fresh air flow is provided for operation areas except the head-on area, meanwhile, the higher air speed can be formed in the head-on area, the common problem of gas accumulation in a traditional wall-attached air duct technology is effectively solved, and the gas explosion risk is reduced.

Description

technical field [0001] The invention relates to a dust control method for a fully mechanized excavation face, in particular to a method and a system for the ventilation and dust control of the fully mechanized excavation face with reverse swirl wind. Background technique [0002] In recent years, with the continuous improvement of the degree of mechanization of coal mines and the continuous increase of mining intensity, the concentration of dust on the mining face of coal mines has increased sharply, and the working environment has deteriorated, which seriously threatens the safety of mine production and the physical and mental health of workers. At present, the dust concentration of domestic excavation face is generally 1000-2500 mg / m when no measures are taken. 3 , in some cases even higher than 3000mg / m 3 . After the measures are taken, the working environment of most working faces is still quite harsh, and the maximum dust concentration at the working site of the fully...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of high-concentration dust pollution in fully mechanized excavation working faces, various measures such as spray dust suppression, ventilation dust removal, chemical dust suppression, and water injection dust suppression are usually adopted. The effect is remarkable, mainly through the generation of radial swirl wind and moving to the headward direction under the action of the negative pressure of the draft, forming a consistent dust control air curtain pointing to the head. Complex, high-altitude operation risks, and the problem of gas accumulation often occurs in the head-on area, often because the workers do not adjust the position of the wall-attached fan in time, resulting in poor dust control effect, unless a monorail crane is added to assist the movement in the roadway, otherwise it is difficult. Further promotion and use of fully mechanized excavation face

Images