Depth Judgement Method of Rockburst and Its Application

There is a critical depth for rock burst in the engineering practice.If the classification of rockburst can be divided by the excavation depth of engineering,it will have the great significance to the prediction and control of rockburst in actual project.Based on the rockburst judgement factors used at home and abroad,the relationship between the judgement factors and the excavation depth of engineering is obtained by analysis.The relationship between geostress and the occurrence depth of rockmass was investigated.According to the theory of elastic-plastic mechanics,three formulas of rock burst depth criterion have been given.The classification of rockburst was made in these formulas to keep in accordance with initial formula.Experiment results showed that these formulas have good practicality and effectiveness.