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为了掌握压入式通风条件下全岩巷综掘工作面的高浓度粉尘运移规律,以邢东矿南翼集中运料巷为背景,深入剖析全岩巷综掘工作面的产尘机理,依据气固两相流理论,借助于计算流体力学的离散相(DPM)模型,对综掘工作面通风过程中的粉尘颗粒运移及浓度分布规律进行数值模拟研究。模拟结果表明:在距工作面20 m范围内,风流场稳定性较差,粉尘浓度较高,然后沿程逐渐降低并趋于稳定,且带式输送机的机道粉尘浓度明显要高于人行道。
In order to grasp the rule of high concentration dust migration in the fully mechanized heading face of fully mechanized rock roadway under the condition of pressured ventilation, taking the centralized transport lane in the south wing of Xingdong mine as the background, According to the theory of gas-solid two-phase flow, with the help of computational fluid dynamics discrete phase (DPM) model, the numerical simulation of dust particle migration and concentration distribution in fully mechanized mining face ventilation is carried out. The simulation results show that the wind flow field is less stable and has a higher dust concentration within 20 m from the working face, and then gradually decreases along the way and tends to be stable. The dust concentration of the belt conveyor is obviously higher than that of the sidewalk .