文献类型：期刊文献

英文题名：INVESTIGATIONS ON STRESS-DEPENDENT THERMAL CONDUCTIVITY OF FRACTURED ROCK BY FRACTAL THEORY

作者：Miao, Tongjun[1];Chen, Aimin[2];Yang, Xiaoya[1];Li, Zun[1];Liu, Hao[1];Yu, Boming[3]

通讯作者：Miao, TJ[1];Yu, BM[2]

机构：[1]Xinxiang Univ, Sch Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[2]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[3]Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Phys & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[2]corresponding author), Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China.|[11071]新乡学院;

年份：2023

卷号：31

期号：5

外文期刊名：FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY

收录：;EI(收录号：20232914423165);Scopus(收录号：2-s2.0-85165187089);WOS:【SCI-EXPANDED(收录号:WOS:001019266200003)】；

基金：This work was supported by the Natural Science Foundation of Henan Province, China (Grant No.222300420512), the National Natural Science Foundations of China (through Grant No. U1704132), and the Ninth Group of Key Disciplines in Henan province (Grant No. 2018119).

语种：英文

外文关键词：Thermal Conductivity; Fractal; Stress; Fractured Rock

摘要：Stress field is a key external factor affecting the thermodynamic properties of rock in many scientific and engineering fields ranging from geoscience to practical problems in geothermal resources, oil and gas exploitation, mineral exploitation, etc. In this work, the stress-dependent models for the effective thermal conductivity of fractured rock are proposed by combining the fractal geometry theory and the two-part Hooke's model. The proposed model for the effective thermal conductivity is a function of the effective stress and structure-parameters and physical parameters of fractured rock, such as porosity (fs), fracture orientations (?? and f) as well as ks and kf. The results show that thermal conductivity increases nonlinearly with increasing stress at low stress range due to the closure of fractures, then, it exhibits an almost linear behavior of pressure dependence at high stress range for most fractures closing completely. The proposed thermal conductivity model coupled with stress is evaluated by comparison with the available experimental data. The model predictions show a good agreement with the available experimental data. A more detailed investigation of the essential influence of structures parameters of a set of fractures on the dimensionless stress-dependent thermal conductivity is performed. The proposed model may provide a good quantitative understanding of the stress effect on thermal conductivity of fractured rock.