中文摘要：

利用地震记录中的衰减信息（波形与频谱）计算岩体的品质因子（Q值），对岩体质量进行准确评价，典型的方法有振幅法、上升时间法、频谱比法、质心频率偏移法。本文介绍了这些方法的原理，并对它们的稳定性、适用情况做出了评价。

英文摘要：

Based on the attenuation information （ waveform and spectrum） in the seismogram, the seismic quality factor Q can be calculated for the rock mass. This paper presents some typical methods to compute the Q value to evaluate the rock mass quality. The methods include amplitude, rise -time, spectral ratio, and centroid frequency shift. The paper gives the principles of these methods, and discusses their stability and applicability.