低温下孔隙水和孔隙结构对饱水岩石导热性的影响

Effect of Pore Water and Pore Structure on Thermal Conductivity of Saturated Rock at Low Temperature

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中图分类号：TU454 文献标志码：A 文章编号：1005-8249（2025）01-0094-05

DOI：10.19860/j.cnki.issn1005-8249.2025.01.018

ZHU Dongzhu

(Shaanxi Railway Engineering Survey Co.，Ltd.，Xi'an 710O43，China)

Abstract：Toexplore theefectof poresizeandstructureonthermaldifusivityofsaturatedrockduring frezing.Thethermal difusioncoeffcients offinesandstone，coarsesandstone，tuffandgranitewere measuredbyarbitrary heating method.The variationlawandcorrelationof thermaldifusivityofrockmassunderdifrent waterstateandtemperaturearesummarizedThe efectof porosityandpore structureonthermaldifusivityofsaturatedrockduringfreezing isanalyzed.Theresultsshowthatthe variationofthermaldifusivityinthecolingprocessofsaturatedrockismainlydeterminedbyporestructureand poresize distribution，rather thanrock water contentand porosity.Rocks with large pores，suchascoarsesandstone，have obvious temperaturesensitivityatsaturatedwater.Therefore，thevariationbehaviorofthermaldifusivityduringcolingcanbeestimated by measuring the pore size distribution and thermal properties of rock mass.

Key words： rock； temperature； thermal diffusion coefficient；porosity；pore structure

0 引言

研究岩石的热物性质直接影响到地球内部各圈层至地表各种环境条件下的热生成、储存和传递[1-2]。（剩余10942字）