U型回采工作面回风隅角布置方式对风流流场的影响研究

发布时间：2018-05-08 19:23

本文选题：回风隅角 + 布置方式　；参考：《西安科技大学学报》2017年04期

【摘要】：为研究矿井工作面回风隅角风流流场与其布置方式之间的关系,应用FLUENT软件,建立回风隅角滞后和正常布置2种几何模型,结合现场相对压力的变化趋势,模拟分析2种模型回风隅角的压力和流场分布情况。结果表明:何家塔煤矿50105工作面回风隅角滞后1.5 m时,其回风隅角相对压力较正常布置时高,且其变化趋势与现场具有较好的一致性;回风隅角支架后方处于最大流速仅为0.16 m/s的涡流中,而正常布置时支架后方最大流速可达0.3~0.45 m/s且涡流范围很小;回风巷外帮附近,回旋流以大于正常布置时约0.2 m/s的速度将附近气体带向回风隅角,但在支架后方的涡流区域,其风流速度又小于正常布置。根据对比分析,回风隅角滞后时,回风隅角处会产生较大范围的涡流,影响有害气体的流散,应尽量避免回风隅角的滞后,或通过改变回风隅角风流流场的方法来防止有害气体积聚。
[Abstract]:In order to study the relationship between the air flow field of the return wind corner angle of the mine face and its layout mode, two geometric models of the return air corner angle lag and the normal arrangement are established by using FLUENT software, and combined with the change trend of the field relative pressure. The pressure and flow field distribution of the two models are simulated and analyzed. The results show that the relative pressure of return wind corner is higher than that of normal arrangement when the return air corner angle of 50105 face is delayed 1.5 m, and its variation trend is in good agreement with the field. The maximum velocity is only 0.16 m / s at the back of the corner angle bracket, but the maximum velocity can reach 0.3 ~ 0.45 m / s in normal arrangement, and the eddy current range is very small. At a velocity of about 0.2 m / s, the circumferential flow takes the nearby gas to the corner corner, but in the vortex region behind the support, the velocity of the swirl is smaller than that of the normal arrangement. According to the comparative analysis, when the return air corner lags, there will be a large range of eddy current at the return air corner, which will affect the dispersion of harmful gas, and the hysteresis of the return air corner should be avoided as far as possible. Or by changing the wind flow field in the corner to prevent the accumulation of harmful gases.
【作者单位】：西安科技大学安全科学与工程学院;教育部西部矿井开采及灾害防治重点实验室;陕西省何家塔煤矿;
【分类号】：TD72;TD822.2

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