Coal-rock damage evolution characteristics based on infrared radiation under uniaxial compression
CHENG Fuqi
LI Zhonghui
WEI Yang
YIN Shan
LIU Shuaijie
KONG Yanhui
Abstract：In order to quantitatively study evolution law between temperater parameter of infrared radiation and coal-rock damage law under uniaxial compression,temperature data of infrared radiation during coal-rock failure process was collected and analyzed.A coal-rock damage model was established according to damage mechanics theory,so as to obtain relationship between the maximum infrared radiation temperature (MIRT) and coal-rock damage.The results show that:① The MIRT-time curve has a good correspondence with load-time curve of the coal-rock under loading,and the MIRT can reflect the damage of coal-rock under loading.② The coal-rock damage model based on infrared radiation temperature accumulation can well reflect evolution,development and failure of cracks in the coal-rock under uniaxial compression.③ The correlation coefficient between calculated stress based on MIRT accumulation and measured stress is more than 0.8,which is highly correlated,and peak of the calculated stress-strain curve is ahead of the one of the measured stress-strain curve.
Keywords：coal-rock dynamic disastercoal-rock monitoring and pre-alarmingcoal-rock failure under loadingcoal-rock deformationcoal-rock damage evolutionuniaxial compressioninfrared radiationthe maximum infrared radiation temperature
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 64-70 )