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冻融过程中岩石内部热传导弛豫特性研究

Study on heat conduction relaxation in rock during the freeze-thaw process
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摘要 为了研究冻融过程中岩石内部的传热规律,对冻融过程中类岩石试件内部的温度变化进行了定点监测,基于实测的不同温度下岩石热参数构造了显热容模型,并对冻融过程中岩石内部热传导弛豫现象和温变规律进行了模拟和分析。研究结果表明:冻融过程中饱和岩石内部出现了明显的热传导弛豫现象,温变曲线呈现三区段变化特征;构造的显热容模型可以较好地模拟出冻融过程中的热传导弛豫区段;建立了考虑热弛豫现象的冻融岩石温度场模拟方法,模拟结果与实测结果吻合度较好。 To study the heat transfer laws inside rock during the freeze-thaw process, the temperature of rock-like sample was first monitored in the study. Based on the thermal parameters at different temperatures, an apparent heat capacity model was established. Meanwhile, the heat conduction relaxation and temperature variation laws were simulated and discussed. Results indicate that the heat conduction relaxation in rock could be obviously observed during the freezing and thawing process. The temperature variation curves of saturated rock could be markedly divided into three sections. In addition, the heat conduction relaxation section could be well simulated using the apparent heat capacity model. Taking into account the heat conduction relaxation, a method to simulate the temperature field during freeze-thaw cycle was proposed. The simulation results agreed well with the measured results.
作者 荣腾龙 申艳军 杨更社 王路军 王铭 RONG Tenglong;SHENYanjun;YANG Gengshe;WANG Lujun;WANG Ming(School of Mechanics and Civil Engineering,China University of Mining & Technology (Beijing),Beijing 100083,China;School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China)
出处 《采矿与安全工程学报》 EI CSCD 北大核心 2019年第1期207-214,共8页 Journal of Mining & Safety Engineering
基金 国家重点研发计划项目(2016YFC0600704) 国家自然科学基金项目(51674266,41772333).
关键词 冻结法 冻融过程 热传导弛豫 显热容 freezing method freeze-thaw process heat conduction relaxation apparent heat capacity
作者简介 荣腾龙(1988-),男,河南省焦作市人,博士研究生,从事岩体冻融损伤断裂方面的研究。E-mail:rongtenglong@126.com Tel:13521978822.
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