Abstract: In this paper we have studied the characters of the spectrum of high-frequency AE waves in rock containing a single long fault. The distribution of arrival time of waves,the intensive translation of phases and amplitude of waves changed,which depends on the position of source and accepting points,and the direction of fault.Specially,the amplitudes of waves were reduced largestly when propagating through the fault in larger angle.Therefore,the wave propagation in the medium depends on the geological constructure of the medium.

Key words: Rock mechanical test, Crack, Elastic wave, Two-dimensional model, Frsquency spectrum

摘要： 通过分析单裂缝岩石标本中弹性波到时分布、波震相转换和波振幅衰减等规律,进一步用波场及频谱量刻划介质横向不均匀性。P波震相遇裂缝端部后出现“之”字形波峰,分叉成折射P波、绕射P波,它的特征也依赖于发射源和接收点相对于裂缝的位置,当波以大角度斜跨裂缝和发射点在约裂缝半长度范围时波到时和振幅差别更大。对其研究有助于认识弹性波场在含断层结构中的复杂图象特征、在野外勘探中提高地震资料解释、断裂构造识别能力和提高弹性波在非完整岩石实验中的声发射定位等能力。

关键词: 岩石力学实验, 裂隙, 弹性波, 二维模型, 频谱