Abstract
Coal deformation and damage are the fundamental causes of mining disasters. This paper proposes an intelligent sensing method of infrared thermal imaging applied to the characterization analysis of deformation and damage of coal mass during loading. The thermal infrared imager and crack monitoring equipment were used to jointly monitor the average infrared radiation temperature (AIRT) and damage pattern of coal samples under the combined disturbance of dynamic and static loads during uniaxial loading. The time–frequency characteristics of infrared radiation during the destruction of coal samples were analyzed; a crack recognition model based on Mask R-CNN was constructed to identify and detect different crack shapes after the destruction of coal samples. The results show that the uniaxial compressive strength of the coal sample under static load is greater than the combined disturbance of dynamic and static loads, the degree of deformation and damage of the coal sample is more severe, and the cracks are more obvious; the uniaxial compressive strength of the coal sample under the combined disturbance of low-frequency dynamic and static loads is higher than that of the high-frequency composite disturbance of dynamic and static loads. Composite disturbance of frequency, dynamic and static loads; a DST analysis method for coal sample fracture and a new index of coal sample damage degree are proposed. The research results can provide reference for early warning of coal and rock deformation and damage.
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No datasets were generated or analysed during the current study.
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Acknowledgements
The authors thank for the Key Laboratory of Western Mine Exploration and Hazard Prevention, Ministry of Education, Xi'an University of Science and Technology.
Funding
We thank the project supported by the Major Program of the National Natural Science Foundation of China (52394191), National Natural Science Foundation of China (52274138), Innovation Capability Support Program of Shaanxi (2022KJXX-58) and Yulin High-tech Zone Science and Technology Plan Project (ZD-2021–01) for its support of this study. We would sincerely want to thank the peoples who are supported to do this work and reviewing committee for their estimable feedbacks.
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Peng-Fei Shan and Xing-Ping Lai guided the writing of the article, Yi-Wei Shi wrote the draft. Wei Li and Pan Yang provided the ideas and collected the data to test. Tong Yang and Chen-Wei Li assisted in carrying out the test.
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SHAN Peng-fei, SHI Yi-wei, LAI Xing-ping, LI Wei, YANG Tong, LI Chen-wei and YANG Pan declare that they have no conflict of interest.
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Shan, PF., Shi, YW., Lai, XP. et al. Analysis of the evolution characteristics of infrared energy of coal samples under composite disturbance of dynamic and static loads. Environ Earth Sci 83, 191 (2024). https://doi.org/10.1007/s12665-024-11511-7
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DOI: https://doi.org/10.1007/s12665-024-11511-7