Microseismic multi-parameter characteristics of rockburst hazard induced by hard roof fall and high stress concentration

•Before rockburst, the sudden rise of MS energy and the lower level of event count.•When rockburst, peak value of fault total area, the lower b   value, and |Z||Z|>2.•When rockburst, the largest energy ratio in the dominant low-frequency band.•Before rockburst, abnormal cluster of sources and high-energy events congregation.•Prior to rockburst, the sudden drop of EME amplitude indicating macro-fracture.