气溶胶在不同倾角裂隙中穿透率研究

为研究气溶胶在自然界不同倾角岩体裂隙中的穿透率,对理想模型进行了理论分析计算,并在实验室用钢板制做模拟裂隙置于不同角度进行实验。结果表明:实测值与修正后的理论计算值吻合较好,对于有一定倾角的规则尺寸岩体裂隙可以通过修正后的理论计算公式得到气溶胶在其中的穿透率;随着水平倾角的交替改变(-90°~90°),气溶胶穿透率呈现周期性变化,随着相对角度(0°~90°,0°~-90°)的增加,气溶胶穿透率明显上升,且大粒径粒子尤为明显,小粒径粒子受角度影响较小;随着侧面倾角增大(0°~90°),气溶胶粒子穿透率逐渐上升(尤其是大粒径气溶胶粒子);裂隙呈水平状态时,气溶胶在其中的穿透率最低。裂隙倾角变化,对小粒径气溶胶粒子穿透率影响不大,对大粒径气溶胶粒子穿透率影响较为明显。

Aerosol Penetration through Cracks of Various Dip Angles

In order to study the aerosol penetration through natural rock fractures of various dip angles,the simulating experiments,as well as the theory analysis and calculations with ideal model,were performed in laboratory.The results shows that the measured value is coincident with the calculated value,the aerosol penetration can be theortical calculated in regular cracks of various dips;and it varies periodically with the alternate change of dips(-90°~90°),the penetration increase with the increase of dips(0°~90°,0°~-90°),especially the larger aerosol particles,while the fine changes little.The penetration especially the larger aerosol particles increase with the increase of dips(0°~90°),while reduce to the minimum when the angle is horizontal.When cracks’ dip angles change,the large particles’ penetration changes more while the fine changes little.