Visualization test method for studying the law of dust migration in fully mechanized roadway

Abstract

The invention discloses a visual test device and method for studying the law of dust migration in fully mechanized excavation face roadways. The test device includes a model roadway, a dust generation system, a ventilation and dust removal system, a hot and humid gas supply system and a flow field monitoring system; the model The roadway includes a transparent roadway body, the dust generating system includes a frequency conversion dust generator, the ventilation and dust removal system includes an air supply pipe, an exhaust pipe, a frequency conversion vacuum cleaner, and a frequency conversion blower, the hot and humid gas supply system includes a constant temperature water bath and a backup fan, and a flow field monitoring system Including contact measuring devices and non-contact measuring devices. This test method uses the above-mentioned test device to simulate, observe and analyze the migration process of dust in a complex environment in the roadway. The invention can realize the dust migration process under the condition of no ventilation in the cold roadway, can simulate the phenomenon of dust diffusion, migration and deposition in the roadway under hot and humid conditions, and can also simulate the effect of the wind field on the dust distribution in the roadway under the condition of multi-ventilation affect the situation.

Description

technical field [0001] The invention relates to the field of ventilation and dust removal model tests for safety engineering, in particular to a visualization test device and method for studying dust migration laws in complex environments in tunnels of fully mechanized excavation faces. Background technique [0002] With the improvement of the mechanization degree and production intensity of comprehensive mechanized excavation in coal mines, the problem of coal mine dust damage has become increasingly prominent. Especially in fully mechanized excavation face, the roadway dust output is large and the concentration is high. According to reports, when dust prevention measures are not taken, the dust concentration in the roadway of the fully mechanized excavation face seriously exceeds the standard, which directly leads to the increase of the hidden danger of dust explosion. At the same time, the concentration of respirable dust in the driver's place seriously exceeded the stan...

AI Technical Summary

Problems solved by technology

[0003] A comprehensive analysis of the main dust control measures at home and abroad shows that the existing dust control and dust removal technologies and management measures have great limitations, and the effect of dust control is not ideal. The essential problem is that the law of dust distribution is still unclear, resulting in The design and equipment layout of many dust removal systems on site cannot achieve the best results or cannot be used at key points

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