关键词: 岩爆倾向性, 评价指标, 体积应变, 裂纹损伤应力

Abstract: The evaluation of rock burst proneness is the basis of risk assessment of rock burst in underground engineering. However, existing numerous evaluation indexes with different characteristics results in application errors frequently. After clarifying the concept of rock burst proneness, the evaluation indexes of rock burst proneness were summarized and categorized through a comprehensive literature review. From the perspective of acquisition methods of their values, the index of rock burst proneness (Wet) and the coefficient of intensity brittleness (B) were analyzed. The inflection point of volumetric strain, as unloading control point in test process, was recommended to determine the value of Wet. Thus, the traditional difficulty that the unloading point was hardly controlled during the test process, was solved. According to testing results, this method was proved to be scientific and effective. By comprehensively investigating the values of Wet and B for different kinds of rock, the relationship of these two indexes was analyzed and the evaluation standard of B value was further improved. Therefore, this study provides a significant guidance for scientifically and reasonably evaluating rock burst proneness.

Key words: rock burst proneness, evaluation index, volumetric strain, crack damage stress