摘要
破碎花岗岩巷道内的氡析出率易受气象条件和通风条件的影响。文章通过建立巷道中氡析出率的计算模型,分别对夏季自然通风、压入式通风和抽出式通风条件下的氡析出率变化情况进行分析。结果表明:氡析出率与自然通风量和环境温度之间均存在线性关系;在相同的环境温度和通风量条件下,巷道在抽出式通风时的氡析出率高出压入式通风时的63%。建议在夏季进行巷道内作业时应避开高温时段,并应以压入式通风作为主要通风方式。
The regularity of radon exhalation is affected by the weather and the ventilation in the over-broken granite tunnel.Based on the calculation model of radon exhalation in tunnel,some experiments have been carried out to analyze the variation of the radon exhalation in natural ventilation,blowing and exhaust conditions separately.The result showed that there is a linear relation between the radon exhalation and the natural ventilation,the temperature outside the tunnel also works as the same.It also shows that in the same condition of the tunnel's air flux and the outside temperature,the radon exhalation in exhaust case is 63% higher than the blowing case.When the temperature outside is high works in tunnel should avoid,and the blowing ventilation could be an effective way for reduction of radon concentration.
出处
《土木建筑与环境工程》
CSCD
北大核心
2013年第S1期222-226,共5页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金创新群体基金(50921063)
关键词
破碎花岗岩巷道
氡析出率
通风
over-broken granite tunnel
radon exhalation
ventilation
