Space three-dimensional dust control and removal method for dust produced during bracket moving of fully mechanized mining face

Abstract

The invention discloses a space three-dimensional dust control and removal method for dust produced during bracket moving of a fully mechanized mining face. Different dust-proof measures are conductedon the upper, middle and lower spaces of the fully mechanized mining face, an air curtain machine or different kinds of nozzles is / are utilized to form a gas-water double-curtain closed space and a single fog filed closed space, a sensor sends a signal to a central processing system, thus fully-automatic spraying dust-reduction in the bracket moving process of column descending, bracket advancing, column ascending and the like is conducted, and the high-concentration dust is concentrated in the closed space to be treated in a concentrated mode, or the high-concentration dust is blocked outside the closed space; by utilizing closed dust-isolation and spraying dust-reduction modes, a wireless transmission system is adopted, a remote control device is utilized to send a radio signal, a signal processor receives the signal and transmits the signal to the controller, thus the controller can adjust the air volume of the air curtain machine, the spraying range of the nozzles and the water passing pressure, the dust reduction efficiency in the bracket moving process is improved to 95% or above, coal dust explosion accidents are avoided, and the operation environment of workers is also greatly improved.

Description

technical field [0001] The invention relates to a method for preventing and controlling dust in coal mines, in particular to a three-dimensional space-controlled dust removal method for dust production in fully mechanized mining working faces. Background technique [0002] Coal is the main energy source in my country, accounting for about 70% of the total primary energy consumption. At present, with the continuous improvement of mechanization and automation of coal mines, the amount of dust generated in coal mining face production continues to increase. When no dust prevention measures are taken, the dust concentration in the fully mechanized mining face can reach 5000-8000mg / m 3 , and the dust produced by moving racks can account for more than 45% of all dust, which will not only cause pneumoconiosis, but also cause coal dust and gas explosion accidents, posing a serious threat to mine safety production. However, the "Coal Mine Safety Regulations" stipulates that the maxi...

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Problems solved by technology

[0003] The main dust prevention measures adopted at the fully mechanized mining face include coal seam water injection, ventilation and dust removal, spray dust suppression, wet dust collection, personal protection, physical and chemical dust suppression, etc. However, the fully mechanized mining face is an open production space with a large operating space and high wind speed , the dust produced by the action of the hydraulic support can spread to the entire working space with the wind in a very short time. Effective governance, dust pollution is still very serious

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