多道瞬态瑞雷波测试技术问题讨论

在多道瞬态瑞雷波测试中,采集高质量的瑞雷波信号是探测成功的关键。而影响瑞雷波测试的因素是非常复杂的,根据影响因素的类型可概括为振源的激发条件、波动信号的接收系统、采集参数(空间采样点数、时间采样点数、检波器排列长度、偏移距、振源与检波器排列组合等)的合理设计、测试场地环境影响以及探测介质结构特征等,合理的设计和优化采集参数对瑞雷波测试具有重要意义。该文根据试验数据进行总结和对比,系统讨论了影响瑞雷波测试质量的主要因素并提出了在测试之前对这些参数的优化和设计原则。

Discussion on Some Problems of Multi-channel Transient Rayleigh Wave Prospecting

To collect high quality Rayleigh wave signal in the field is the key to successful prospecting for multi-channel transient Rayleigh wave.However,there are many factors to affect the selection of optimum field parameters,including impulse condition of vibration source,receiving system of fluctuation signal, rational design of acquisition parameters(spatial sampling number,time sampling number,alignment length of detector,offset,the permutation and combination of vibration source and detector etc.),environment of site,structure characteristic of detecting medium and so on.It is important to rational design and optimize field acquisition parameters for Rayleigh wave prospecting.Many experimental data are summarized and contrasted,and the main factors of influencing Rayleigh wave prospecting are discussed,as while optimum and design principle of these parameters are also proposed before prospecting.