Through the analysis of the mechanical state of the process of rock burst inoculation,the process of rock burst has been revealed gradually.Research shows:(1)The preparation process of mechanical form of rock burst is from elastic into plastic,the rock burst happens in plastic rock,but the surrounding elastic rock mass provides the rock burst energy;(2)The premise condition of rock burst is that the surrounding rock,which is in one direction stress state and has the maximum stress concentration factor,appears plastic failure area after the excavation;(3) Rock burst occurs only when the elastic strain energy which is released by the rockburst rock and the surrounding rock is larger than the energy which is produced by friction and cohesion;(4) Stress condition is the trigger condition for the occurrence of rock burst,energy condition is the fundamental condition for the occurrence of rock burst.%通过对岩爆孕育过程的力学状态分析,逐步揭示了岩爆的形成过程.研究表明:(1)岩爆孕育过程的力学形态是由弹性转化为塑性,在塑性岩体中发生岩爆,而由其周围弹性岩体提供岩爆能量;(2)岩爆的前提条件是地下工程开挖后,处于单向应力状态且应力集中系数最大的硐壁围岩出现塑性破坏区域;(3)岩爆体只有在满足自身释放和周围围岩对其释放的弹性应变能大于由摩擦力和粘结力做功形成的阻能情况下才会发生岩爆;(4)应力条件是岩爆发生与否的触发条件,能量条件才是岩爆发生与否的根本条件.
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