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| Citation: |
LEI Yueyu, LI Zhonghui, TIAN He, et al. Experimental study on changes of infrared radiation energy in siltstone failure process under different loading rates[J]. Safety in Coal Mines, 2024, 55（1）: 151−159. DOI: 10.13347/j.cnki.mkaq.20222013
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In order to study the influence of loading rate on infrared radiation energy of siltstone during loading failure, and quantitatively analyze the change law of infrared radiation energy of siltstone during loading process, the infrared radiation experiments of siltstone under uniaxial compression at different loading rates were carried out. The results show that the peak stress decreases with the increase of loading rate. Under different loading rates, in difference mode, the maximum infrared radiation temperature ΔTmax has a good correspondence with the stress change, which can better reflect the damage of the sample, and the maximum temperature difference of ΔTmax increases by 1.0-1.7 ℃. During the main rupture, cumulative infrared radiant energy increment ΔQ increases slowly with time. There is a power function relationship between ΔQ and mechanical work. With the increase of mechanical work, the cumulative infrared radiation energy increment increases first and then increases slowly. The range of infrared precursor ratio of specimen damage under different loading rates is 0.02-0.285, and decreases with the loading rate.
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