中文摘要：

从材料的强度理论出发,建立量化分析原岩应力场下岩体稳定性的评价方法,并分析了岩体初始稳定性与冲击地压动力灾害发生的相关性。以莫尔-库伦强度理论为基础,推导出莫尔-库伦应力（Wσ）评价指标,以反映岩石破坏前某一应力状态下岩石材料体接近极限破坏强度的程度。Wσ在单轴压缩、单轴拉伸、三向受压、压缩-拉伸等岩石应力状态下,都能表现出应力状态接近极限的程度,Wσ越接近1,岩石越接近破坏极限,原岩稳定性越差。运用Wσ描述岩体初始地应力场状态能够表达出岩体所处应力状态与极限状态的接近程度,有助于判断初始应力场下的岩体稳定性。岩体初始稳定性越差的区域发生冲击地压动力灾害的概率越高,依据Wσ划分稳定、较稳定、中等稳定、较低稳定、低稳定5级稳定区,对原岩初始稳定性进行评价,为预测工程活动所引发的冲击地压等地质动力效应提供参考。

英文摘要：

From the view of the mass intensity theory,the stability evaluation method of rock mass under the initial ground stress field is analyzed quantitatively,and the correlation between the initial stability of rock mass and the occurrence of underground dynamic disaster. Based on the Mohr-coulomb strength theory,the Mohr-coulomb stress（ Wσ） evaluation index are derived to reflect the level of rock approaching to the limit damage intensity under a stress state before damage. Wσcan represent rock stress is close to the failure limit under uniaxial compression,uniaxial tension,three directional stress,and compression-tension. The closer Wσis approaching to 1,the closer the rock is to the failure limit,meanwhile,the worse stability the rock has. The description of initial ground stress field of rock mass by Wσcan express the proximity extent of the rock mass stress state and the limit state,which is helpful to determine the rock mass stability under initial stress field. Where the rock mass has the worse initial stability owns a higher probability in occurrence of dynamic disaster of rock burst. According to the Wσ,5 stable zones such as high stable,higher stable,med-high stable,lower stable,low stable level are divided to evaluate the initial stability of rock mass. The research can provide references for predicting the impact ground pressure and other geological dynamic effect induced by the engineering activities.