Experimental study on the monitoring of rockburst in tunnels under dry and saturated conditions using AE and infrared monitoring

•The water state changes the tunnel fracturing, the acoustic emission parameters and the infrared radiation temperature.•The AE quiet period lasted longer for the dry models, and the quiet period of AE event rate and the sharply increasement of AE energy rate can be regarded as the precursor to rockburst on the time-scale.•Before the rockburst occurs in the tunnel, the sudden changes of the temperature of the tunnel walls can be used as the precursor to rockburst on the space-scale.