回采工作面瓦斯分布及传感器部署  

Methane Distribution and Methane Sensor Deployment in Robbing Working Surface

作　　者：孙继平[1] 唐亮[1] 陈伟[1] 张向阳[2] 刘艳杰[3] 

机构地区：[1]中国矿业大学北京煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学北京信息工程研究所,北京100083 [3]黑龙江科技学院嵩山校区,哈尔滨黑龙江150090

出　　处：《系统仿真学报》2008年第4期823-825,840,共4页Journal of System Simulation

基　　金：电子信息产业发展基金重点项目(财政部,财建[2005]688号;信息产业部,信部运[2005]555号)

摘　　要：为了给回采工作面上瓦斯传感器的安放提供理论依据,用Fluent软件仿真了巷道瓦斯浓度分布。建立了回采工作面巷道几何模型,并对其进行网格划分,根据湍流状态下的守恒方程以及湍流动能方程和湍流耗散率方程,采用RNGk-ε模型,用Fluent软件仿真了井下进风巷、回采工作面及回风巷瓦斯的分布情况。仿真结果表明:瓦斯在上隅角容易形成积聚;风流在冲洗回采工作面后进入回风巷的拐弯处时候,风速不稳定;传感器部署在拐弯处内侧和外侧的监测效果是不同的。瓦斯传感器应放置在距回采工作面的距离小于或等于10m的位置,该结论与煤矿安全标准中的规定吻合。To provide theory base of methane sensor placement in robbing working surface, Fluent software was used to simulate methane distribution. Geometry model was established and divided by grids. Methane distribution in intake, robbing working surface and outtake was simulated using RNG k-ε model by Fluent according to conversation equation in turbulent state, turbulent kinetic energy equation and turbulent dissipation rate equation. The results show that methane is likely to accumulate in the upper corner, when wind passes through the corner after washing robbing working surface, wind velocity is unstable, the performance of sensor placed in inner side of turning is different from that placed in outer side of turning. Distance of methane sensor to robbing working surface should be no more than 10m which accords with the regulation of mine safety regulations well.

关 键 词：数值模拟 传感器 瓦斯分布 回采工作面 RNG k-ε模型 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程]