Coal-rock damage evolution characteristics based oninfrared radiation under uniaxial compressio

CHENG Fuqi; LI Zhonghui; WEI Yang; YIN Shan; LIU Shuaijie; KONG Yanhui

doi:10.13272/j.issn.1671-251x.2017110064

Volume 44 Issue 5

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Article Navigation > Journal of Mine Automation > 2018 > 44(5): 64-70

CHENG Fuqi, LI Zhonghui, WEI Yang, et al. Coal-rock damage evolution characteristics based oninfrared radiation under uniaxial compressio[J]. Industry and Mine Automation, 2018, 44(5): 64-70. doi: 10.13272/j.issn.1671-251x.2017110064

Citation:

CHENG Fuqi, LI Zhonghui, WEI Yang, et al. Coal-rock damage evolution characteristics based oninfrared radiation under uniaxial compressio[J]. Industry and Mine Automation, 2018, 44(5): 64-70. doi: 10.13272/j.issn.1671-251x.2017110064

Citation:

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Coal-rock damage evolution characteristics based oninfrared radiation under uniaxial compressio

doi: 10.13272/j.issn.1671-251x.2017110064

CHENG Fuqi^{1, 2},
LI Zhonghui^{1, 2, 3},
WEI Yang^{1, 2},
YIN Shan^{1, 2},
LIU Shuaijie^{1, 2},
KONG Yanhui^{1, 2}

1.
Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Xuzhou 221116, China
2.
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
3.
State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China

Publish Date: 2018-05-10

Abstract

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.