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岩石岩爆倾向性评价是地下工程岩爆风险评估的基础,评价指标众多,且各有特点,应用存在误区。在澄清岩爆倾向性概念的基础上,通过系统文献调研,对岩爆倾向性评价指标进行了归纳和分类,从获取方法的角度重点分析了岩爆倾向性指数W_(et)和强度脆性系数B。针对W_(et)获取中卸载点难以准确控制的传统难题,建议了以体积应变反弯点作为卸载控制点的试验方法,试验结果表明,该方法科学、有效。基于对岩石W_(et)和B值的充分调研总结,分析了二者的相互关系,改进了B值评价标准,为更科学合理地评价岩石岩爆倾向性奠定了坚实基础。
The rockburst tendency evaluation is the basis of the rock burst risk assessment of underground engineering. There are many evaluation indexes, each of them has its own characteristics and the misunderstanding of its application. Based on the clarification of the concept of rockburst tendencies, the systematic evaluation of the rockburst tendencies is summarized and classified. From the point of view of the methods of acquisition, the tendency of the rockburst tendency index W et and the intensity brittleness coefficient B. Aiming at the traditional problem that it is difficult to accurately control unloading point in W et acquisition, a test method using volume bending point as unloading control point is proposed. The experimental results show that this method is scientific and effective. Based on the thorough investigation and summarization of W et and B values, the correlation between the two values and the evaluation criteria of B value are improved, which lays a solid foundation for more scientific and reasonable evaluation of rockburst tendencies.