文献类型：期刊文献

英文题名：Deformation characteristics and permeability variations induced in the coal matrix induced by thermo-mechanical coupling

作者：Yi, Xin[1,2];Ren, Yao[1];Xiao, Yang[1,2];Ren, Lei[3];Zhang, Mengfan[1];Yang, Linchun[4]

第一作者：Yi, Xin

通信作者：Ren, Y[1]

机构：[1]Xian Univ Sci & Technol, Sch Safety Sci & Engn, Xian 710054, Shannxi, Peoples R China;[2]Xian Univ Sci & Technol, Shaanxi Key Lab Prevent & Control Coal Fire, Xian, Peoples R China;[3]Gansu Univ Chinese Med, Sch Clin Med, Lanzhou, Gansu, Peoples R China;[4]Northwestern Polytech Univ, Sch Automat, Xian, Shannxi, Peoples R China

第一机构：Xian Univ Sci & Technol, Sch Safety Sci & Engn, Xian 710054, Shannxi, Peoples R China

通信机构：[1]corresponding author), Xian Univ Sci & Technol, Sch Safety Sci & Engn, Xian 710054, Shannxi, Peoples R China.

年份：2022

卷号：44

期号：4

起止页码：9103

外文期刊名：ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS

收录：;EI(收录号：20224012842723);Scopus(收录号：2-s2.0-85139197907);WOS:【SCI-EXPANDED(收录号:WOS:000863382100001)】；

基金：This research was financially supported by the following funds: The National Natural Science Foundation of China (no. 51804247) and the Natural Science Foundation of Shaanxi Province, China (no. 2018JM5071). The authors are also grateful to the anonymous reviewers for their constructive comments. This manuscript was edited by Wallace Academic Editing.

语种：英文

外文关键词：Deformation characteristics; permeability; thermo-Mechanical coupling; fractal theory; thermally sensitive model

摘要：To evaluate the coal deformation characteristics and explore the evolution law of coal permeability under different conditions, the MTS815 and PCI-2 acoustic emission (AE) test systems were applied to conduct the triaxial percolation test under other thermo-mechanical coupling conditions, and the fractal model of coal fractal with integrated stress and temperature was established. The results indicated that the peak stress, strength and deformation parameters of the samples were positively correlated with the confining pressure. The temperature can promote the crack propagation, derivation and new cracks of coal samples. The macrocracks and percolation channels space inside the samples increased with the increase of the thermal-mechanical coupling condition. The AE signal was mainly released in the plastic and peak phases; the growth of confining pressure intensified the aggravation of the internal damage to the coal sample and caused the frequent occurrence of AE signals. The compressive coefficient C (f) of coal fracture decreased with the addition of average effective stress, and the ruptured coal had the same trend with the increase in pore pressure; the calculated values of the new thermally sensitive model were consistent with the measured values. The applicability of the theoretical mechanism and the data matching were of high credibility.