Analysis on the dust prevention mechanism of air curtain in fully mechanized excavation tunnel
Hao Wang1
Chuangye Xin2
Shouqing Lu1
Yongliang Zhang1
Zhanyou Sa1
Jinxu Tao2
Zhuang Liu2
1.Department of Safety Science and Engineering,Qingdao University of Technology,Qingdao 266520,China;Research Center for Accident Prevention Technology in Key Industries of Shandong Province,Qingdao University of Technology,Qingdao 266520,China2.Department of Safety Science and Engineering,Qingdao University of Technology,Qingdao 266520,China
摘要：Aiming at reducing the dust pollution during the tunneling process and improving the application efficiency of air curtain dust prevention technology,according to the changes of radial jet velocity(vr),axial extraction velocity(ve)and extrac-tion distance(L)in the formation process of air curtain,the numerical simulation method was used to analyze the rules of airflow structure evolution and the diffusion characteristics of dust particles in fully mechanized excavation tunnel.The results indicate that as vr and ve increase,the migration path of the wall jet of the air curtain changes into an axial direction;as L decreases,the migration distance increases accordingly.These phenomena make the airflow distribution in the working face tends to be uniform.The dust diffusion distance reduces as well,wherein,the range of the discrete area of dust particles decreases sharply,until all dust particles are concentrated in the accumulation area.On this basis,the vr,ve and L were optimized and applied in the 63up08 fully mechanized working face.By the application of the optimal parameters,the average dust removal efficiency at the driver's position increased by 71％.The dust concentration was reduced and the working environment had been improved effectively.
机标关键词：mechanismtunnelanalysisdustcurtainexcavationfullymechanized
论文发表日期：2025-02-28
在线出版日期：2025-10-15（本平台首次上网日期，不代表文献的发表时间）
页数：14( 152-165 )
英文信息