Working surface dust treating and preventing method based on working surface on-site coal dust diffusion regulation

Abstract

The invention discloses a working surface dust treating and preventing method based on a working surface on-site coal dust diffusion regulation. A supporting frame negative pressure secondary dust removing device, a coal mining machine negative pressure secondary dust removing device and a wet-type rolling blind dust preventing net, wherein the supporting frame negative pressure secondary dust removing device and the coal mining machine negative pressure secondary dust removing device perform mist spraying dust reducing according to an entrainment mechanism of a water jet, a negative pressurearea can be formed to entrain high concentration dust aggregates in a working area to improve the dust reduction efficiency, the wet-type rolling blind dust preventing net sprays water mist onto a filter net to form a filter membrane under the action of the tension on the surface of water, the bumping probability between dust in air flows and the filter membrane is increased to improve the dust capturing efficiency, the location and manner of three dust reduction measures are designed according to on-site numerical simulation and the distribution of wind flows and the dust, and cooperative using is conducted to achieve the purpose of reducing the dust concentration of the working surface. The method has the advantages that the dust reducing efficiency is improved, and the dust concentration on large-mining-height comprehensive-mining working surface is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and relates to a design of a dust prevention system based on the law of distribution and diffusion of air flow and dust in a fully mechanized mining face with a large mining height, and determines the negative pressure secondary dust collector of the hydraulic support, the negative pressure secondary dust removal device of the coal mining machine and the The installation position and form of the best dust-proof effect of the wet-type roller shutter dust-proof net, and a new method to improve the flour dust control effect of fully mechanized mining with large mining heights. Background technique [0002] Fully mechanized mining with large mining height is to use the same fully mechanized mining support as the mining height (according to MT550-1996 "Technical Conditions for Large Mining Height Support", the maximum mining height is greater than or equal to 3800mm, and it is used for the hyd...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a working flour dust control method based on the on-site coal dust diffusion law of the working face, which solves the problem of difficulty in dust prevention and low efficiency caused by improper application of dust prevention technology in the existing large mining height working face