The research and application on whole-rock mechanized excavation face of pressure ventilation air curtain closed dust removal system
Abstract：The formation mechanism of pressure ventilation air curtain was analyzed in heading face;the single-phase air flow mathematical model was established withk-ε two-equation model. And the different conditions of air curtain that pressure ventilation outlet in whole-rock mechanized excavation face is in different length from heading face were numerical simulated with FLUENT software and based on SIMPLE algorithm unstructured colocated meshes. The re- suits show that with the increase of the length of pressure ventilation outlet from heading face, the ability of forming air curtain that covers the whole section strengthens constantly in roadway. 1.62 Pa air curtain can be formed in about 8.7 m from heading face position, when pressure ventilation outlet is 30 m from the heading face ; it is the best dis- tance of formation pressure ventilation air curtain. The pressure ventilation air curtain closed dust removal system was designed, and the system of dust removing result was experimented when the pressure ventilation outlet from the head- ing face was about 10,20,30 and 35 m in southern main return way of whole-rock mechanized excavation face of Tangkou Coal Mine. According to the data, the dust concentration decreased significantly after application of four sys- tems, especially pressure ventilation outlet from 30 m heading face had the most obvious effect, and the rate is as high as 95. 1% and 96. 1%. This is consistent with the value simulation results.
Keywords：whole-rock mechanized excavation facepressure ventilation air curtaincloseddust removalk-ε equation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1165-1170 )