为研究加载速率对粉砂岩受载破坏过程红外辐射能量的影响，定量分析粉砂岩加载过程红外辐射能量变化规律；开展了不同加载速率下粉砂岩单轴压缩红外辐射实验。研究结果表明：峰值应力随加载速率的增加而减小，不同加载速率下，差值模式下红外辐射温度最大值Δ_max与应力变化具有较好的对应性，更能反映试样的破坏情况，Δ_max的最高温差突增范围为1.0~1.7 ℃；主破裂时，累计红外辐射能增量Δ随时间变化呈缓慢增长趋势，破裂时对应的累计红外辐射能增量随加载速率的增大逐渐减小；Δ与机械功之间呈幂函数关系，随着机械功的增加，累计红外辐射能量增量呈现出先增大后缓慢增长趋势；不同加载速率下试样损伤红外前兆比的范围为0.02~0.285，且随加载速率逐渐减小。

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 Δ_max has a good correspondence with the stress change, which can better reflect the damage of the sample, and the maximum temperature difference of Δ_max increases by 1.0-1.7 ℃. During the main rupture, cumulative infrared radiant energy increment Δincreases slowly with time. There is a power function relationship between Δand 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.