Abstract
In this article the research methods and theoretical models of moisture transfer in the porous medium material are reviewed and summarized. The optimal theoretical model of moisture transfer in the underground tunnel is found out. Through the comparison among different calculating methods of surface moisture content, the limestone material moisture equilibrium curve and the variation curve of time-dependent moisture transmission coefficient and the amount of moisture transfer are calculated. Based on all the statistics above, using the state equation of ideal gas, the variation trend of time-dependent oxygen content under the condition that the moisture transfer amount increased in the underground tunnel is gained, making ways and offering reference for further related research.
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