瓦斯稀释器对工作面流场分布的影响

Influence of Gas Diluter on Distribution of Flow Field in Working Face

为得到瓦斯稀释器对工作面流场分布的影响,利用Fluent数值模拟软件对有、无瓦斯稀释器条件下的工作面流场分布规律进行了研究。结果表明:工作面沿程0～95 m,有、无稀释器条件下的风流均在工作面沿程前端漏入采空区,在中后端由采空区漏向工作面;在工作面沿程95～100 m,无稀释器时风流由采空区漏向工作面,有稀释器时风流则由工作面漏入采空区。工作面沿程0～96 m,有、无稀释器条件下的瓦斯浓度均呈逐渐增大的趋势,但在工作面沿程31～64 m稀释器的布置增大了工作面的瓦斯浓度。在工作面沿程96～100 m稀释器的布置则使得工作面瓦斯浓度得以降低。瓦斯稀释器的布置可以使得更多的风流流经工作面上隅角,从而降低工作面上隅角瓦斯浓度。

In order to get the influence of gas diluter on the distribution of the flow field in working face,the fluent numerical simulation software was used to study the flow field distribution in the working face with or without gas diluter.In the area along 0 to 95 m of working face,the wind flow under conditions of with or without gas diluter are leaking into the goaf at front end of working face.but in the middle-back part along working face the wind flow are leaking from the goaf to working face.In the area along 95 to 100 m of working face,the wind flow under conditions of without gas diluter leaks into the working face from goaf,while wind flow leaks into goaf from working face under conditions of with gas diluter.In the area along 0 to 95 m of working face,the gas concentration under with or without gas diluter are all show a trend of gradually increasing,but in the area along 31 to 64 m of working face the diluter arrangement increases the gas concentration of working face.In the area96 to 100 m along the working face,the gas diluter makes the gas concentration of working face can be reduced.The arrangement of gas diluter can make more wind flow through the working face upper corner,thus reduces gas concentration of the working face upper corner.