摘要
为改善综掘面高浓度粉尘的工作环境,以淮北某矿的综掘面为研究对象,通过理论分析和数值模拟的方法,在混合式通风系统的基础上,安装风幕装置在综掘机前端。分析在不同工况下,综掘工作面内粉尘浓度的变化情况,研究结果表明:随着送风筒口与迎头面距离增加,呼吸带粉尘浓度也随之降低,当二者距离为25 m时,巷道后方粉尘浓度最低;风幕出口宽度增加,巷道呼吸带后方粉尘浓度相应有所降低,但出口宽度超过8 cm时,风幕射流强度减弱,受回风流影响粉尘浓度也随之增加;开启风幕后,粉尘被控制在距迎头面0~5 m内,随着初始风速的增加,风幕射流抗干扰能力得到提升,当风速为12.5 m/s时,风幕控尘效果最佳。
In order to improve the working environment of high concentration dust in the comprehensive excavating face, taking the comprehensive excavating face of a mine in Huaibei as the research object, through theoretical analysis and numerical simulation, an air curtain device is installed in the front end of the comprehensive excavating machine based on mixed ventilation system system. By analyzing the changes of dust concentration in the excavation face under different working conditions, the research results show that the dust concentration in the breathing zone decreases with the increase of the distance between the air supply cylinder and the face. When the distance between the two is 25 m, the dust concentration in the back of the roadway is the lowest. When the width of the air curtain outlet increases, the dust concentration at the rear of the breathing zone of the roadway decreases correspondingly. However, when the width of the outlet exceeds 8 cm, the strength of the air curtain jet weakens and the dust concentration increases due to the influence of the return air flow. When the wind background is opened, the dust is controlled within 0~5 m away from the headface. With the increase of the initial wind speed, the anti-interference ability of the air curtain jet is improved. When the wind speed is 12.5 m/s, the dust control effect of the air curtain is the best.
出处
《建模与仿真》
2022年第3期675-683,共9页
Modeling and Simulation
