Air-water double-curtain dust settling device and method for fully-mechanized excavation face

Abstract

The invention discloses an air-water double-curtain dust settling device and a method for a fully-mechanized excavation face. A hydraulic support comprises front support beams and main support beams, each main support beam has at least two air injection holes behind a hinged position, two air injection holes in a plurality of main support beams jet air simultaneously to form a shielding air curtain perpendicular to the main support beam, the shielding air curtain, the front support beams and a coal wall form a dust control space, at least one row of air distributing holes and at least one row of mist spraying nozzles are arranged on each front support beam, the air distributing holes of the plurality of front support beams jet air simultaneously to form a plurality of barrier air curtains perpendicular to the front support beams, the barrier air curtains divide the dust control space into a plurality of dust settling spaces, the corresponding mist spraying nozzles spray simultaneously to form a dust settling water curtain. The air-water double-curtain dust settling device is used in an underground coal mine through spraying for dust settlement and air curtains for dust separation, a closed and comprehensive dust prevention space for a coal mining machine is formed on the fully-mechanized excavation face, and the air-water double-curtain dust settling device is safe and convenient and has the dust settling efficiency up to 99%.

Description

technical field [0001] The invention relates to a coal mine underground dust-proof device and method, in particular to an air-water double-curtain dust-reducing device and a dust-reducing method for a fully mechanized mining face. Background technique [0002] According to statistics, more than 90% of coal mines in my country are underground mining, and mines and working faces are developing towards large-scale, intensive, safe, reliable and mechanized automation. The resulting dust problem is also becoming more and more serious, seriously affecting the safe production of mines and the health of workers. Among them, the fully mechanized mining face is the dust source with the largest underground dust production. Under the condition of no dust prevention measures, the measured total dust concentration of the fully mechanized mining face when the shearer is cutting is as high as 5000-6000mg / m 3 , up to l0000mg / m 3 , leading to the increasing intensity of dust production in t...

AI Technical Summary

Problems solved by technology

The resulting dust problem is becoming more and more serious, which seriously affects the safe production of mines and the health of workers.

Among them, the fully mechanized mining face is the dust source with the largest underground dust production. Under the condition of no dust prevention measures, the measured total dust concentration of the fully mechanized mining face when the shearer is cutting is as high as 5000-6000mg / m 3 , up to l0000mg / m 3 , leading to the increasing intensity of dust production in the fully mechanized mining face and the concentration of dust in the working environment, which poses a serious threat to the safety of coal mine production and the health of workers

[0003] At present, although various dust prevention technical measures such as ventilation and dust removal, coal seam water injection, and spray dust suppression have been adopted in the fully mechanized coal mining working faces in major coal-producing countries, the working conditions of most working faces are still quite bad, especially the work of coal shearer drivers. It is difficult to control the dust concentration within the coal mine environmental industry standards stipulated in my country, which has brought serious threats and damage to the health of coal mining machine drivers, and has also brought negative effects on coal mine production, and may even easily cause dust explosions. , causing mine accidents

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