计算物理 ›› 2021, Vol. 38 ›› Issue (4): 456-464.DOI: 10.19596/j.cnki.1001-246x.8295

• 研究论文 • 上一篇    下一篇

温度及围护通风对独头巷道氡浓度分布的影响

杨展康(), 牛奕()   

  1. 武汉理工大学安全科学与应急管理学院, 湖北 武汉 430070
  • 收稿日期:2020-10-29 出版日期:2021-07-25 发布日期:2021-12-21
  • 通讯作者: 牛奕
  • 作者简介:杨展康(1997-), 男, 研究生, 研究方向为地下矿井污染气体分布, E-mail: yzkwhut@163.com
  • 基金资助:
    国家重点研发计划(2017YFF0209704);国家自然科学基金(51706164)

Influence of Temperature, Enclosure and Ventilation on Radon Concentration Distribution in a Blind Roadway

Zhankang YANG(), Yi NIU()   

  1. School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan, Hubei 430070, China
  • Received:2020-10-29 Online:2021-07-25 Published:2021-12-21
  • Contact: Yi NIU

摘要:

根据计算流体力学以及氡的物理性质,建立具有硐室的独头巷道内氡的三维稳态传输模型,采用Fluent软件求解控制方程,使用UDF实现巷道内壁氡的析出和氡的衰变,得到独头巷道内的风场结构及氡的浓度分布。研究发现:通风量一定时,温度对氡的浓度影响显著,巷道内温度越高,巷道各处氡浓度越高。整个巷道硐室氡浓度最大,相比于修建防氡围护,对硐室采用局部通风,降氡效果更好。采用压入式通风时,巷道内氡浓度由内向外递增,提高巷道的通风率能够有效地降低巷道入口的氡浓度,但对硐室内氡浓度影响不大。

关键词: 氡, 数值模拟, 通风, 温度

Abstract:

With computational fluid dynamics and physical properties of radon, a three-dimensional steady-state transport model of radon in a blind roadway with a chamber is established. The control equation is calculated with software Fluent. Radon exhalation and decay in the inner wall of the roadway are realized with UDF. Wind field structure and radon concentration distribution in roadway are obtained. It shows that when the ventilation rate is constant, temperature has a significant effect on radon concentration. The higher the temperature in the roadway, the higher the radon concentration in the roadway. Radon concentration of the chamber is the greatest in the whole roadway. Compared with radon prevention enclosure, local ventilation is better for reducing radon. As pressure ventilation is adopted, radon concentration in the roadway increases from inside to outside.Improving ventilation rate of the tunnel reduces effectively radon concentration at the entrance of the tunnel, while it has little effect on radon concentration in the chamber.

Key words: radon, numerical simulation, ventilation, temperature

中图分类号: