综采工作面风流-粉尘逸散规律CFD模拟分析

CFD simulation analysis of airflow and dust dispersion laws in fully mechanized mining face

根据枣庄矿业3上301综采工作面的现场情况,应用FLUENT软件建立煤矿巷道模型,对综采工作面上的风流和粉尘分布情况进行模拟,分析得出粉尘随风流的逸散规律。模拟结果表明,综采工作面风流总体呈现出中间大、两头小的规律,风流在液压支架和煤壁之间会形成一段大于4m/s的高风速带;粉尘受到风流的影响,向下风侧以及人行道处逸散,由于采煤机截割和液压支架移架两道工序产尘的区域有所重叠,所以在距离移架产尘点下风侧9m左右,距离液压支架底板上表面1.5m左右的呼吸带范围,是综采工作面防尘关注的重点区域。

Based on FLUENT software, a coal mine roadway model was established according to the in situ conditions of No. 3 upper 301 fully mechanized work face. The air flow and dust distribution of the fully mechanized mining face were simulated by numerical analysis, and the laws of dust migration was obtained. The simulation results showed that the amount of air flow in the fully mechanized mining face was high in the middle and low in both ends, and the air flow would form a high wind speed belt over 4 m/s between the hydraulic support and coal wall. The dust was affected by the air flow and dispersed to the downwind side and sidewalk. Because of the overlap of the dust-producing areas of two processes of shearer cutting and hydraulic support moving, the area of respiratory belt about 9 m away from the downwind side of dust-producing point and 1.5 m away from the upper sur face of hydraulic support was the key area of dust proof in the fully mechanized mining face.