为评价某洞室对气溶胶粒子的封堵特性,利用电子低压碰撞器(ELPI)对洞室气溶胶穿透率进行实验测量,得到气溶胶渗透进入洞室的穿透率,初步建立评价洞室气溶胶穿透率的方法.结果表明:该洞室气溶胶的穿透率为0～0.32,对应粒径为0.08～3 μm,显著低于一般居所的气溶胶穿透率.通过两次实验测量对比发现,洞室的整体穿透率由少数较大裂隙决定,有效封堵大裂隙可以显著减小气溶胶的穿透率.%In order to estimate the efficiency of stopping aerosol particles from leaking out of a grotto, the aerosol penetration rate through the cave was measured by electrical low pressure impactor (ELPI), and a research method was elementarily established. The experiments results showed that the aerosol penetration rates of 0～0.32 were found for corresponding aerosol size range 0.08～3 μm in the grotto. This penetration rate was obviously lower than that of ecumenical buildings. According to the contrastive experiments, the conclusion that whole penetration rate of the grotto depended on broad slit was be found. Accordingly, aerosol penetration rate was distinctly debased by caulking the broad silt.
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