Theory And Application Of Rockburst Based On The Damage

There is direct relation between the rockburst and internal damage mechanism of coal or rock. The damage evolution is a process from breeding to start. There are important theoretical significance and practical value which creating damage model of coal or rock and studying mechanism of the rockburst based on research of micro-crack expansion.The existed achievements and non-damage CT test results are used to analyze internal damage mechanism of coal or rock in this paper. The mathematical model of rockburst theory is created based on mecro damage mechanism of coal or rock. It was used to analyze rockburst phenomenon of circular tunnel, the expresses of damage variable are obtained; the equation of the critical damage radial and load were obtained too. The results show that the rockburst of circular tunnel is relation to mechanical property of rock and size of tunnel.According to rockburst feature in Wulong Mine, the total measure and concrete project of rockburst prevention were put forward for 331 mining area.