中文摘要：

岩爆（冲击地压）日益成为危害工程安全生产的灾害，建立有效判据对于防治这类灾害具有重要意义。基于莫尔一库伦强度理论，通过解析几何数学方法，推导建立了冲击危险性应力指标，并以二长花岗岩为试验材料，采用三轴试验方法，对该判据予以了证明分析。研究表明：①基于摩尔库伦强度理论建立的冲击危险性判据——冲击危险性应力指标与岩石稳定状态具有良好地相关性，该值越大，相对应力水平越高，岩石发生冲击破坏的可能性越大。②冲击危险性应力指标可以反应岩石在某一应力水平下的冲击危险程度，弥补了单独分析最大主应力和最小主应力作为单一分析指标的不足，反映了应力参量和材料物理力学参量（内摩擦角、黏聚力）等对岩石冲击危险性的影响。③为数值计算方法提供了新的分析指标，可根据数值计算结果进一步计算出冲击危险性应力指标在空间的分布情况，反映出不同空间位置的岩体的冲击危险性情况，为岩爆发生提供预测依据。

英文摘要：

Rock burst is increasingly becoming the dangerous disasters damaging to engineering safety, thus the establish- ment of an effective criterion to prevent this type of disaster is of great importance. Based on the Mohr-Coulomb strength theo- ry, the stress indicators of impact risk deduced by analytic geometry method is proposed, and the criterion is verified by the tri- axial tests of monzogranite rock sample. The research shows that The criterion of impact risk and its stress indicator has a good correlation with the rock stability. Specifically, the higher the value is, the higher the probability of impact risk is. @）The stress indicator of impact risk can reflect the impact risk degree of rock under a certain stress level, which can comprehensively reflect the influence both of stress parameters and mechanical parameters on the impact risk, and compensate the deficiency of single-index analysis of the maximum principal stress, the minimum principal stress. It can be employed as a new analysis in- dicator for the numerical method. The spatial distribution of the stress indicator obtained by numerical calculation is a direct re- flection of the rock impact risk in different locations ,which provides a predicting basis for rock-burst.