Acoustic Emission and Infrared Radiation Energy Evolution in the Failure of Phosphate Rock: Characteristics and Damage Modeling

作者：Manqing Lin, Xuan Mao Peng, Ye Chen, Qi Liao, Xiaoping Lu, Xiqi Liu · 发表于：Applied Sciences · 年份：2025 · DOI：10.3390/app15169001 · 研究领域：Rock Mechanics and Modeling、Geophysical Methods and Applications、Drilling and Well Engineering

Accurately characterizing the energy evolution during rock failure is crucial in understanding instability mechanisms and enabling the real-time monitoring and early warning of geological hazards in mining and geotechnical engineering. However, the energy evolution characteristics and correlations of multi-physics signals like acoustic emission (AE) and infrared radiation (IR) require further investigation. This study specifically investigated the energy evolution of AE and IR and their correlation during the uniaxial compression failure process of phosphate rock. Tests were performed on specimens under different loading rates to analyze energy dissipation and damage progression. Based on damage mechanics theory, damage evolution models were developed to describe the relationship between the cumulative AE energy, IR radiation variations (specifically the change in the average infrared radiation temperature, ΔAIRT), and strain under varying loading conditions. The results indicate that the loading rate significantly influences the energy release mechanism, with higher rates intensifying rock damage. The peak AE energy rate coincides with the inflection point of the cumulative energy curve, marking substantial internal energy release at failure. Additionally, as the loading rate increases, high-temperature regions in IR thermograms appear earlier, while the variation in ΔAIRT follows a decreasing trend. From an energy perspective, the correlation between AE ringing counts and t...