钻爆法施工深埋隧道喷雾降尘数值模拟研究  

Numerical simulation study of affecting spraying and dust reduction in deeply buried tunnels constructed by drill-and-blast method

作　　者：周玉竹 魏丁一 曹伟杰 卢增雄 林明磊 杜小坤 ZHOU Yuzhu;WEI Dingyi;CAO Weijie;LU Zengxiong;LIN Minglei;DU Xiaokun(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Sichuan Zhuchuang Safety Technology Co.,Ltd.,Chengdu Sichuan 610040,China;School of Resource and Safety Engineering,Henan University of Engineering,Zhengzhou Henan 451191,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]四川铸创安全科技有限公司,四川成都610040 [3]河南工程学院资源与安全工程学院,河南郑州451191

出　　处：《中国安全科学学报》2024年第11期66-72,共7页China Safety Science Journal

基　　金：国家卫生健康委粉尘危害工程防护重点实验室开放课题(KLECDH20230201);河南省高等学校重点科研项目(23B440005);河南工程学院博士培育基金资助(D2022021)。

摘　　要：我国隧道建设工程发展迅猛,钻爆法施工隧道粉尘危害严重,为提高钻爆法施工隧道喷雾降尘效果,运用数值模拟方法,采用ANSYS软件建立隧道模型,研究不同围岩温度、喷射水流速度及喷嘴直径等因素条件下深埋隧道内粉尘质量浓度分布变化特征。结果表明:随着围岩温度的升高,粉尘运动更加剧烈,对降尘效率影响越大,雾滴对粉尘的捕捉效果随围岩温度的升高而逐渐降低;随着喷射水流速度的增大,喷射管道内水压增大,雾滴对粉尘捕捉效果越好;降尘效率随喷嘴直径的增大而降低,喷嘴直径过大时雾滴对颗粒物的捕捉能力会减弱,当喷嘴直径较小时会提高降尘效率,但喷嘴直径过小时,过多的飞溅水雾反而影响降尘效率。Tunnel construction projects in China have developed rapidly,and significant dust hazards are associated with drilling and blasting construction.To improve the effectiveness of spraying to reduce dust in tunnels,this article uses digital simulation and a tunnel model was created using ANSYS.The variations in dust mass concentration distribution under different conditions,such as surrounding rock temperature,jet velocity,and nozzle diameter,were investigated in the study.The results show that as the surrounding rock temperature increases,dust movement becomes more intense,which significantly affects dust reduction efficiency.The dust capture effect of atomized water droplets decreases with the increase in surrounding rock temperature.With the increase of water jet velocity,the water pressure in the jet pipe increases,improving the dust capture effect of the droplets.Dust reduction efficiency decreases with increasing nozzle diameter.When the nozzle diameter is too large,the ability of water mist to capture particles weakens.Conversely,a smaller nozzle diameter improves dust reduction efficiency.However,if the nozzle diameter is too small,too much splash water spray rather than affect the efficiency of the dust.

关 键 词：钻爆法施工 深埋隧道 喷雾降尘 数值模拟 围岩温度 喷射水流速度 喷嘴直径 

分 类 号：X964[环境科学与工程—安全科学]