一种基于Ⅱ型全过程曲线的岩爆倾向性指标

A ROCKBURST PRONENESS INDEX BASED ON CLASS II WHOLE PROCESS CURVE

从Ⅱ型全过程曲线所揭示的岩体破坏过程中能量的储存和释放特征出发,并借鉴已有几个岩爆倾向性指标的合理之处,提出一种新的基于Ⅱ型曲线的岩爆倾向性指标。新指标充分借鉴Wet指标反映岩体的弹性与塑性倾向的能力,反映岩爆岩体破坏后区的能量转化特征,同时避免R指标采用硬岩的I型全过程曲线作为计算依据的不合理之处。通过对锦屏Ⅱ级电站辅助洞的岩石进行试验,表明新指标确实能够较好地反映岩体的岩爆倾向。

Based on the energy storage and release properties that have been revealed by the class Ⅱ whole process curve during rock failure process, and the rationality of several existing rockburst proneness indices, a new rockburst proneness index is proposed. The index borrows ideas from Wet of the ability of reflecting the relationship between elastic and plastic tendency of rock, and can reflect the energy transform character. At the same time, it also avoids the irrationality of index R of using the class I whole process curve of hard rock as calculation base. The mechanical tests of the rock from Jinping energy Ⅱ power station auxiliary tunnel show that the new index is verified to be able to show fairly well the rockburst proneness of rock.