综掘工作面附壁旋流通风控尘效果数值模拟  

Numerical Simulation Study on Dust Control Effect of Combined Drilling and Ventilation in Fully Mechanized Head Face

作　　者：蒋逸丹 刘荣华 刘辉[3] 李泳俊 韩涵 裴叶 Jiang Yidan;Liu Ronghua;Liu Hui;Li Yongjun;Han Han;Pei Ye(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safety Mining Techniques of Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;3.Shanxi Yuzhong Energy Group,Shanxi Jinhui Wanfeng Coal Mine Co.,Ltd.,Lyuliang 032300,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [3]山西冀中能源集团山西金晖万峰煤矿有限公司,山西吕梁032300

出　　处：《矿业工程研究》2019年第3期31-37,共7页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51574123);湖南省自然科学基金资助项目(2017JJ3076)

摘　　要：为了得到综掘工作面附壁旋流通风的最佳控尘效果,对附壁旋流通风的流场进行数值模拟.首先在附壁旋流通风方式下,对不同的吹吸流量比进行数值模拟,再改变压风筒轴向和径向的风量比进行数值模拟,得到不同的吹吸流量比和不同轴径风量比下的气流特性以及粉尘浓度分布规律.结果表明:在不同的吹吸流量比下,若吹风量太小,虽然对掘进面的扰动也小,但附壁旋流径向风幕太弱,对粉尘的封堵效果不好.若吹风量太大对掘进面的扰动太大会导致粉尘向巷道后方运动,不利于径向风幕对掘进面粉尘的封堵.在不同的轴径风量比下,随着轴径风量比的减小,径向风幕的强度增强,对掘进面粉尘的封堵效果也增强.当吹吸流量比为0.8和轴径风量比在1︰9以下时可获得较为理想的控尘效果,能够有效的把粉尘控制在掘进面前端由吸风筒排出,使掘进机司机处粉尘浓度得到有效控制.In order to obtain the best dust control effect of the side wall swirling ventilation in the comprehensive excavation working face,the flow field of the side wall swirling ventilation is numerically simulated. Firstly,numerical simulation is carried out on the different suction and suction flow ratios under the method of the wall-swirl ventilation,and then the axial and radial air volume ratios of the pressure cylinder are changed for numerical simulation to obtain different suction flow ratios and different shaft diameters. Airflow characteristics and dust concentration distribution under air volume ratio. Results show that under different blowing and suction flow ratios,if the blowing volume is too small,although the disturbance to the tunneling surface is small,the radial wind curtain of the wall-swirl is too weak,and the sealing effect on dust is not good.If the amount of blowing is too large,the disturbance of the tunneling surface will cause the dust to move to the rear of the roadway,which is not conducive to the sealing of the dust by the radial air curtain. Under different axial air volume ratios,as the axial diameter ratio decreases,the strength of the radial air curtain increases,and the sealing effect on the dust is also enhanced. When the ratio of the suction flow ratio is 0.8 and the air volume ratio of the shaft diameter is less than 1 ∶ 9,the ideal dust control effect can be obtained,and the dust can be effectively controlled at the front end of the tunneling surface to be discharged by the suction cylinder,so that the dust concentration of the driver of the roadheader is made and effectively controlled.

关 键 词：附壁旋流通风 吹吸流量比 轴径风量比 气流特性 粉尘浓度 

分 类 号：TD714[矿业工程—矿井通风与安全]