12°上下行通风工作面煤壁涌出瓦斯分布规律数值模拟  

Study on the Numerical Simulation of the Distribution and Accumulation of the Gas from the Mine Face in the Inclined Coalmine Tunnel in 12°Angle in in Case of Downward and Upward Ventilation

作　　者：段支勇[1] 孙冬[2] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南机电高等专科学校,河南新乡453000

出　　处：《煤》2011年第6期1-4,7,共5页Coal

基　　金：2010年度高等学校博士学科点专项科研基金(20104116110001)

摘　　要：煤壁涌出瓦斯是工作面巷道中瓦斯的重要来源之一;根据后退式U型通风系统流场特点确定适合工作面巷道中瓦斯与风流质量交换的数学模型,针对混合流并带有弯曲壁面的流动,使用Realizab le k-ε双方程湍流模型;利用计算流体力学(CFD)软件F luent对倾斜回采工作面巷道中由煤壁涌出瓦斯形成的瓦斯场进行了模拟,并对上下行通风回采工作面巷道中有煤壁涌出瓦斯形成的瓦斯场进行比较。得出结论:在倾角为12°的巷道中,采用下行通风和上行通风,由煤壁涌出的瓦斯在巷道中形成相似的瓦斯场,在风速较低的情况下,采用下行风比上行风更加有利于瓦斯混合,并且考虑采用上行通风要先排出上隅角由采空区涌出的瓦斯,因此上行风更容易使工作面巷道中的瓦斯发生积聚。The gas from mine face is one of main sources in the coalmine tunnel.Based on the characteristics of velocity field in the backward U-shaped ventilation system,I choose the suitable mathematical model of gas and airflow quality exchange.considering the mixture flow with bent wall,I use the Realizable two equations turbulence model.the Distribution and Accumulation of the gas from the mine face in the Inclined Coalmine tunnel is made for a numerical simulation by Fluent,a Computational Fluid Dynamics software,compairing the gas field in case of downward and upward ventilation.In conclusion,the gas field is very similar,made from the mine face in the Inclined Coalmine Tunnel in 12 ° Angle in in case of downward and upward ventilation.In low-speed situlation,the gas in downward ventilation is easier to be mixed than in upward ventilation.In addition,considering the gas emitted from the goaf must be blow away in upward ventilation,so the gas is easier to accumulate in upward ventilation.

关 键 词：采场 下行风 后退式U型通风 瓦斯源 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]