Bidirectional loading experiments are conducted on granite specimens with holes to simulate the tunnel rockburst. The infrared thermal images and the minimum infrared radiation temperature are employed to determine the temporospatial evolution characteristics of infrared radiation temperature in the process of rockburst. The results show that the temporospatial evolution characteristics of infrared radiation in rock blasting process are synchronized well with the process of initiation and development of the rockburst. Before the rockburst

it is found that there is the low temperature field in the infrared thermal images nested in the banded temperature field. The low temperature field extension reflects the rockburst breed and development process in the temperature field

and its position of appearance corresponds to the region that rockburst occurs. The evolution of the lowest infrared radiation temperature shows a 4 stage characteristics as rise - brief fall - rise - fall. Three abrupt turning points are observed in the lowest infrared radiation temperature before the rockburst. The above results have some theoretical significance for temporospatial prediction of tunnel rockbursts.