综采工作面粉尘浓度分布及运动规律数值模拟

Numerical Simulation of Dust Concentration and Dust Motion Law in Fully Mechanized Working Face

针对煤矿井下综采工作面粉尘产量大、浓度高且降尘困难的特点,结合气固两相流理论,运用FLUENT数值模拟软件,对井下综采工作面风流分布和粉尘浓度运移规律进行模拟研究。研究发现:风流在采煤机滚筒处发生绕流,流速达到最大值4 m/s,在采煤机后方15 m处风速趋于平稳,采煤机机道的风流流速大于人行道风流流速;粉尘浓度在采煤机处达到最大值3 900 mg/m3,采煤机机道粉尘浓度高于人行道粉尘浓度。风流分布与粉尘浓度分布一致。

Aiming at the coal mine high producing dust capacity of fully mechanized working face,large dust concentration,can＇t be reduced easily,combining the theory of gas-solid two phase flow,using numerical simulation software FLUENT,study and simulated the underground distribution of fully mechanized working face wind and dust concentration. It is proved that： the wind flow around in shearer drum place,attain to the maximum velocity of 4 m/s, leveled off after 15 meters,the wind velocity in mining pattern is over the pavement; dust concentration in the coal winning machine reached a maximum of 3 900 mg/m^3,the dust concentration of the coal winning machine is greater than the pavement. Wind and dust concentration distribution are identical.