Abstract: In order to investigate the possibility of temporal linearity(r) and spatial linearity(a)of natural earthquake waveforms serving as earthquake precoursory index, acoustic emission wave forms recorded before and after the deformation and failure of single-joint discontinuous rocks were analysed with the method of temporal and spatial linearity. The results show that the temporal linearity(r) decreases after the failure of discontinuous rockmass specimens with different joint-angles. In all cases the spatial linearity(a) also decrease,with even larger magnitude. Before the occurrence of the largest acoustic emission event(corresponding to the failure), r and a show decreasing-type anomalous variations in the studied cases.

Key words: Rock mechanical test, Acoustic emission, Waveform analysis

摘要： 对单节理岩石试件加载变形破坏过程中的声发射波形数据使用时间线性度和空间线性度的算法进行了处理分析,研究了所得时间线性度(r)和空间线性度(a)作为地震前兆指标的可能性。所得结果表明：时间线性度(r)在不同节理角的岩石试件破坏前和破坏后,都呈现下降；而空间线性度(a)也表现为下降,且下降幅度更大一些。在不同节理角岩石变形过程的声发射事件中,最大声发射事件(破坏瞬间)发生之前r和a都呈现下降的异常变化。

关键词: 岩石力学实验, 声发射, 波形分析