【摘要】 峰后岩石特性是产生岩爆的根本原因;地质力学因素是产生岩爆的外部因素。从地下工程开挖过程中围岩部分的能量释放、集聚、转移入手,揭示了高地应力是产生岩爆的重要外因;岩爆产生的时空特点是在破坏后塑性软化阶段,并从非线性岩石力学理论角度,研究了此阶段岩爆条件。得出以下结论:一是块系结构岩体变形稳定性与块体几何特性、尺度大小,以及破坏后物理性质有关;二是判断岩体是否发生岩爆,可采用:σββ=8σrr和χ<1?1ν判据。更多还原

【Abstract】 There are some reasons to engender the rock-burst such as the rock post-peak behavior,which is the radical reason,and geological factors,which are exterior.After analyzing the energy releasing and gathering and transferring in surrounding rocks during the excavation in underground projects,it is discovered that the high stress is one of the important factor to engender the rock-burst.Character of engendering the rock-burst in space-time appears in step of plastic intenerated deformation.And the conditions of rock-burst are studied with nonlinear analysis.So the results are that the stability of the rock is connected with the size of the rock and physical characteristic of demolished rock.And the criterions are following the equations,σ ββ= 8σ rrand χ < 1 ?1 ν.更多还原