钻爆法施工隧道风流场及CO运移规律研究  

Study on Law of Air Flow Field and CO Migration in Tunnel Construction by Drilling and Blasting

作　　者：陈凯旋 任杰[1] 马福军[2] 睢佳衡 翟于广 CHEN Kai-xuan;REN Jie;MA Fu-jun;SUI Jia-heng;ZHAI Yu-guang(State Key Laboratory of Eco-Hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China;Sinohydro Bureau 7 Co.,Ltd,Chengdu 611730,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]中国水利水电第七工程局有限公司,四川成都611730

出　　处：《水电能源科学》2024年第12期96-100,共5页Water Resources and Power

摘　　要：为探究压入式通风下隧道钻爆法施工产生的CO运移情况,以卡拉水电站绕坝交通洞工程为依托,根据计算流体力学理论,通过Fluent软件建立隧道CO组分运输模型,并使用现场监测数据对模型准确性进行验证。结果表明,压入式通风产生远离风筒一侧的回流区提供了CO运移的主要动力,风流卷吸纠缠的涡流区对CO运移具有较强的阻碍作用;对比直立呼吸带高度1.5 m和坐立呼吸带高度0.3 m两者的CO浓度变化情况,发现高度越低,CO浓度越低,CO浓度降低速率越慢。可见建立的CO运移模型能够准确地反映CO扩散运移规律,可以为实际工程的通风设计提供参考。In order to investigate the CO migration caused by tunnel drilling and blasting under pressure ventilation,taking the traffic tunnel project around the dam of Kala Hydropower Station as an example,the CO component transport model of the tunnel was established by using the software Fluent according to the theory of computational fluid mechan-ics.The accuracy of the model was verified using field monitoring data.The results show that the main driving force of CO migration is the return zone away from the wind duct,and the entrainment and entanglement vortex zone has a strong hindering effect on CO migration.By comparing the changes of CO concentration between upright breathing belt height of 1.5 m and sitting breathing belt height of 0.3 m,it can be found that the lower the height,the lower the CO concentra-tion is,and the slower the reduction rate of CO concentration is.The established CO diffusion model can accurately re-flect the law of CO diffusion migration,which can provide a reference for the ventilation design of practical engineering.

关 键 词：钻爆法 压入式通风 CO运移 风流场 现场监测 

分 类 号：TV554.1[水利工程—水利水电工程]