Discussion on mechanism of rockburst and stress state based on energy principles

The intrinsic relations between energy dissipation, energy release and failure of rock are discussed. Based on energy principles,the mechanism and characteristic of rockburst are pointed out;and it is proved that the rockburst is a geological disaster which happens in hard brittle rock mass accumulating lots of energy. The stress state and failure location of rockburst in surrounding rock of underground excavation is analyzed by integrating with surrounding rock stress distribution of circular shape tunnel.