低温裂隙岩体的各向异性传热模型

doi:10.13722/j.cnki.jrme.2018.0560

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Abstract The fractured rock mass in cold regions is a typical discontinuous medium，whose heat-transfer characteristics have obviously anisotropy and time-variation. Based on the basic principles of heat transfer，the heat-transfer characteristics of fractured rock mass with ice-water phase change were carried out in this paper. Firstly，the thermal resistance model of single fracture under minus temperature was derived by drawing from the definition of resistance，which has considered the effect of ice-water phase change and thermal convection. Then，based on the law of energy conservation，the heat-transfer model of the representative volume element(RVE) of single fracture rock mass was developed by considering the effect of convective heat transfer on the equivalent heat-transfer property. Based on the additivity of heat-transfer，the anisotropic heat-transfer model of rock mass with several sets of fractures in cold regions was established，thus enabling the equivalent continuous treatment of heat-transfer property of fractured rock mass in cold regions. Finally，the model were verified by a rock sample with a set of horizontal fractures and a rockmass slope. The results indicate that the maximum error is less than 1.0 ℃，which means the accuracy of this model could meet the needs of the real fractured rock mass engineering in cold regions.

Key words： rock mechanics fractured rock mass anisotropic heat-transfer model ice-water phase change

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	Articles by authors
	LIU Naifei1
	2
	LI Ning2
	SONG Zhanping1
	LI Guofeng2

Cite this article:

LIU Naifei1,2,LI Ning2, et al. The anisotropic heat-transfer model of fractured rock mass in cold regions[J]. , 2019, 38(S1): 2625-2635.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0560 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS1/2625

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