Abstract：There are many omens existing before rock fracturing，which is an important research issue of rock mechanics and rock engineering. Based on the fundamental experiments on remote sensing-rock mechanics，the thermal infrared radiation (TIR) omens of rock fracturing are systematically analyzed and studied. The research contents of this paper include the types and features of TIR omens，the occurring time of TIR omens，the spatio-temporal features of TIR omens，and its mechanism. It is concluded that (1) there are two kinds of TIR omens for rock fracturing，i.e.，TIR image anomaly and curve of average TIR temperature and time anomaly，which reflect the spatial and temporal features of TIR omens respectively，(2) the TIR image anomaly is classified as high-temperature strip and low-temperature strip，and the curve of average TIR temperature and time anomaly is classified as temperature drop，rapid rise of temperature and rise-from-drop of temperature，(3) the omens occur before peak load at the moment when load is 77%～87% of the peak load，and they are tightly related to the formation of micro-cracks，(4) the possibility of omens of shearing fracturing with high confining pressure or high compressive stress is higher than that with low confining pressure or low compressive stress，and the possibility of omens for pure-shear will be less and its occurring time is close to the fracturing moment，and (5) the mechanism for the TIR omens of rock fracturing is the comprehensive effect of rock thermo-elasticity and rock friction.
