摘要
良好的透明度是开展复杂条件下大尺度透明土可视化试验的前提与保障。为了配置高透明度的透明土,以正十二烷和15号白矿油为孔隙流体、熔融石英砂为骨料的透明土为研究对象,基于光度学原理提出了克里斯琴森透射率配置修正式,并通过试验加以验证,完善了透明度优化方法。结果表明:①透明土固液折射率差值与固体颗粒粒径是影响透明度的自身配置特性因素;②对于厚度为100 mm的透明土,固液折射率差值的上下限是±0.002;在理论温度范围内(常压,0~50℃),温度每升高1℃孔隙流体折射率减小约0.0004;③温度越高,达到理想的孔隙流体折射率(1.4585)对应的烷油体积比越低;④熔融石英砂透明土的无色光学玻璃光吸收系数介于5级和6级之间。
High transparency is the prerequisite and guarantee for conducting large-scale transparent soil visualization experiments under complex conditions.In order to evaluate and configure transparent soil with high transparency,this study takes transparent soil as the research subject,with n-dodecane and No.15 white mineral oil as pore fluid and fused silica sand as aggregate.We proposed a modified formula for the configuration of Christensen transmissivity based on optical principles,and verified the transparency optimization method through experiments.Results indicate that:①Differences in solidliquid refractive index and the particle size of solid particles are factors influencing transparency related to configuration of transparent soil itself.②For transparent soil samples with the thickness of 100 mm,the upper and lower limits of the differences in refractive index were±0.002 between solid and liquid.Within the theoretical temperature range of 0~50℃(under normal pressure),for every 1℃increase,the refractive index of the pore fluid decreased by about 0.0004.③The ideal refractive index of pore fluid(1.4585)at higher temperatures corresponded to a lower volume ratio of alkane to oil.④Transparent soil in the grade of light absorption coefficient in the colorless optical glass was between Grade 5 and 6.
作者
李赓照
单仁亮
窦浩宇
张婧
周博森
王逸飞
LI Gengzhao;SHAN Renliang;DOU Haoyu;ZHANG Jing;ZHOU Bosen;WANG Yifei(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《矿业科学学报》
北大核心
2025年第4期584-594,共11页
Journal of Mining Science and Technology
基金
国家自然科学基金(52274148)
中央高校基本科研业务费专项资金(2022YJSLJ11)。
关键词
透明土
高透明度
克里斯琴森原理
固液折射率
颗粒粒径
transparent soil
high transparency
Christensen principle
solid-liquid refractive index
solid particle size
