基于气-固两相流的深埋隧道烟尘运移特征  

Characterization of smoke and dust transport in deep buried tunnel based on gas-solid two-phase flow

作　　者：吴宗之 周玉竹 魏丁一 曹伟杰 马文谨 余杰 WU Zongzhi;ZHOU Yuzhu;WEI Dingyi;CAO Weijie;MA Wenjin;YU Jie(China Occupational Safety and Health Association,Beijing 100029,China;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]中国职业安全健康协会,北京100029 [2]北京科技大学土木与资源工程学院,北京100083 [3]四川铸创安全科技有限公司,四川成都610040 [4]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213-219,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：为提高深埋隧道施工机械的耐用性及改善工人作业环境,基于气-固两相流理论,选取CO和粉尘作为主要研究对象,利用Fluent软件建立深埋隧道物理模型,通过模拟分析深埋隧道中不同围岩温度及风筒出口速度对烟尘运移过程的影响。结果表明:爆破后,CO在抛掷区内均匀分布,随通风时间的增加,CO的运移呈现为平移和扩散2种方式,CO以团状的形式向隧道外排出,且隧道壁处的CO运移速度大于隧道中心的运移速度;爆破瞬间,粉尘大量聚集在工作面附近,随通风时间的增加,粉尘不断向隧道外排出;其中,围岩温度对CO的运移有一定影响,且围岩温度越高,CO的运移速度越快,但围岩温度对粉尘运移的影响相对较小;风筒出口速度对CO及粉尘的运移均有较大影响,且风筒出口速度越大,CO及粉尘的运移速度越快,在现场应用中要结合实际条件和经济预算情况合理选择相关设备。In order to improve the durability of the construction machine and the working environment in deep buried tunnels,based on the theory of gas-solid two-phase flow,CO and dust were selected as the main objects of study,and a physical model of deep buried tunnels was established by Fluent software.The effects of different surrounding rock temperatures and the outlet speed of the wind pipe on the transport process of soot in deep tunnels were investigated through simulation.The results show that after blasting,CO is uniformly distributed in the throwing area.With the increase of ventilation time,the CO transport shows two modes of translation and diffusion.CO is discharged out of the tunnel in the form of a mass,and the CO transport speed at the tunnel wall is larger than that at the center of the tunnel.At the moment of blasting,a large amount of dust gathers near the working face,and with the increase of ventilation time,the dust is continuously discharged out of the tunnel.Among them,the temperature of the surrounding rock has a certain effect on the transportation of CO.The higher the temperature of the surrounding rock,the faster the transportation of CO.However,the effect of the surrounding rock temperature on the transportation of dust is relatively small.The outlet speed of the wind pipe has a greater impact on the transportation of CO and dust.The greater the outlet speed of the wind pipe,the faster the transportation of CO and dust.The field application should be combined with the actual conditions and economic budget to select the relevant equipment.

关 键 词：气-固两相流 深埋隧道 烟尘运移 风筒出口速度 围岩温度 

分 类 号：X964[环境科学与工程—安全科学]