The infrared radiation experiments on bolt and rock in the process ofloading were carried out. It was found that the infrared radiation temperaturesrose wholly and uniformly before stress peak with increase in loading. The boltedrock presented local dissimilation in the thermal image after stress peak. Themulti-layer round infrared radiation isothermal lines were formed around bolt.The temperature was gradually reduced from inside to outside. There were twokinds of infrared omens for bolted rock fracturing, i.e., the infrared thermalimage anomaly and curve of infrared radiation temperature and time anomaly, whichreflected the spatial and temporal features of infrared omens respectively. Thecurve of infrared radiation temperature and time anomaly was temperature drop.The infrared thermal image omen was classified as high-temperature strip and low-temperature strip.(2002CB412701)资助