A spatial three-dimensional control dust removal method for dust production in fully mechanized mining face

Abstract

The invention discloses a space three-dimensional control dust removal method for dust production in a fully mechanized mining face. The fully mechanized mining face, middle and lower spaces are respectively provided with different dust prevention measures, and air curtain machines or different types of nozzles are used. Form an air-water double-curtain closed space or a single fog field closed space, and send signals to the central processing system according to the sensor to carry out fully automatic spraying and dust reduction during the process of lowering the column, moving the bracket forward, and raising the column, so as to concentrate high-concentration dust in the enclosed space. Centralized treatment in the space, or block high-concentration dust from the closed space; use the method of closed dust isolation and spray dust reduction, adopt wireless transmission system, use remote control device to transmit radio signals, and the signal processor receives the signal and transmits it to the controller , so that the controller can adjust the air volume of the air curtain machine, the spray range of the nozzle and the water pressure, and increase the dust reduction efficiency in the process of moving the frame to more than 95%, which not only avoids coal dust explosion accidents, but also greatly improves the working environment for workers .

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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