Study on heat transfer law of rock strata under different temperature conditions
Yongping Wu
College of Energy and Mining Engineering, Xi'an University of Science and Technology
Baoheng Liu
College of Energy and Mining Engineering, Xi'an University of Science and Technology
DOI: https://doi.org/10.59429/pest.v8i1.13416
Keywords: temperature condition; rock stratum; heat transfer law; thermophysical parameter; thermal resistance effect; influence mechanism
Abstract
To reveal the heat transfer evolution law and internal influence mechanism of rock strata under different temperature conditions, and clarify the effects of temperature gradient, lithological characteristics and rock stratum structure on the heat transfer process, this paper systematically studied the variation characteristics of thermophysical parameters of rock strata with different lithologies and under different temperature gradients in the temperature range from normal temperature to 800℃, analyzed the heat transfer laws of single-layer homogeneous rock strata and multi-layer interbedded rock strata, discussed the influence mechanisms of porosity, water content, mineral composition and other factors on the heat transfer of rock strata, and established an unsteady heat transfer mathematical model of rock strata under different temperature conditions.
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