掘进巷道油型气扩散规律数值模拟  

Numerical simulation of oil-type gas diffusion regularities in roadway excavation

作　　者：张俭让[1,2] 张荃[1,2] 董丁稳[1,2] 陈伟[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《西安科技大学学报》2015年第3期307-312,共6页Journal of Xi’an University of Science and Technology

摘　　要：根据掘进巷道风流流场特点,应用计算流体力学(CFD)软件ANSYS的Realizable k-ε双方程模型模拟了掘进工作面的油型气与风流质量混合过程。探讨了掘进工作面风流流场和油型气的主要成分CH4浓度分布规律,对比了油型气在掘进巷道底板不同位置涌出的扩散规律。研究表明,涌出点在涡流内部区域时,油型气与巷道风流混合得更充分;涌出点距掘进头一定距离之后,油型气涌出后随风流方向运动,且巷道顶部浓度较高;涌出源为垂直于掘进方向的裂隙时,油型气扩散后CH4浓度在高度上的浓度差较小,裂隙平行于掘进方向时,高度上的浓度差较大。According to the characteristics of flow field in roadway excavation,a simulation was carried out on mixing procession of airflow and CH4 in heading face with CFD fluent,using Realizable k- εdouble equation model. The heading face airflow field and CH4 concentration distribution was discussed.And emission law of oil-type gas at different floor position was compared. The study found that when the point in eddy current region,oil-type gas and airflow mixed more fully. After a certain distance from point to face,oil-type gas moves with the airflow and the concentration decreases from top to bottom. Emission point for the cracks perpendicular to the driving direction,CH4 concentration in the height of the gas diffusion after oil type difference is tiny discrepancy; cracks parallel to the driving direction,the concentration of the height is large differences.

关 键 词：掘进巷道 数值模拟 风流流场 CH4浓度 

分 类 号：TD712[矿业工程—矿井通风与安全]