低溫下孔隙水和孔隙結(jié)構(gòu)對飽水巖石導(dǎo)熱性的影響

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

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中圖分類號：TU454 文獻標(biāo)志碼：A 文章編號：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

研究巖石的熱物性質(zhì)直接影響到地球內(nèi)部各圈層至地表各種環(huán)境條件下的熱生成、儲存和傳遞[1-2]。（剩余10942字）