Air-water double-curtain dust suppression device and dust suppression method for fully mechanized mining face

Abstract

The invention discloses an air-water double-curtain dust suppression device and a dust suppression method for a fully mechanized mining face. The hydraulic support includes a support front beam and a support main beam, and each support main beam is provided with at least two air injection holes behind the hinge. , the air injection holes on the main beams of multiple brackets spray air synchronously to form a shielding air curtain perpendicular to the main beams of the brackets, and the dust control space is formed by the shielding air curtains, the front beams of the brackets and the coal wall; at least one row of The air distribution holes and at least one drainage mist nozzle, the air distribution holes on the front beam of the multiple brackets spray air synchronously to form several blocking air curtains perpendicular to the front beam of the bracket. The blocking air curtain divides the dust control space into several dust reduction spaces, corresponding to water The fog nozzles spray synchronously to form a dust-reducing water curtain. Through the combination of spray dust suppression and air curtain dust isolation for use in coal mines, a relatively closed and comprehensive comprehensive dust prevention space for coal mining machines has been formed on the fully mechanized mining face, which is not only safe and convenient, but also makes the dust reduction efficiency reach 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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