中文摘要：

通过岩石劈裂破坏实验，采用全相位FFT分析算法，重点讨论了不同通道、不同阶段声发射信号的相位谱特征，根据相位属性，划分为线性以及非线性相位。研究结果表明：线性相位广泛存在于劈裂演化阶段。且与岩石破裂中各阶段能量释放的大小呈正相关，在每一个能量较大值点对应的都是线性相位。比较不同通道同一阶段的能量数据得到，破裂越剧烈对应线性相位的比例越大。这一结论为岩石破裂的阶段分析提供了重要思路。

英文摘要：

Through the rock splitting tests, the phase spec- trum characteristics of acoustic emission signals at different passes and stages were emphatically discussed by all phase FFT method. The phase was divided into linear phase and nonlinear phase based on its properties. The results showed that the linear phase widely existed in the splitting evolution stage, and had a positive relation with the energy release of rock burst at each phase. Each larger energy point correspon- ded to the linear phase. Comparing the energy data at the same stage in different channels, it obtained that the severer fracture, the larger linear phase. This conclusion provided an important idea for phase analysis of rock splitting.