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首页> 外文期刊>Pure and Applied Geophysics >Source Directivity, Signal Decorrelation, Spectral Modulation and Analysis of Spatio-temporal Patterns of Multiple Explosions
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Source Directivity, Signal Decorrelation, Spectral Modulation and Analysis of Spatio-temporal Patterns of Multiple Explosions

机译：源指向性，信号解相关，频谱调制以及多次爆炸的时空模式分析

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— Spectral modulation is used as a criterion for discriminating multiple mining explosions from earthquakes and single blasts. Features in the spectra of regional arrivals from quarry blasts may be explained by the spatio-temporal configuration of shot patterns and are explored via a model based on spatial waveform decorrelation and propagation delay (directivity) effects. The phenomenon of decreasing modulation with decreasing average phase velocities of the seismic wave arrivals can be attributed to a trend of decreasing similarities of waveforms with increasing distance between individual explosions making up the shot pattern for the respective arrivals. Rescaling of the modulation patterns with respect to frequency can be explained by the Doppler effect.¶The postulated relationship between shot pattern layouts and sizes, together with their firing sequences, on one hand, and the similarities and differences in modulation characteristics among the various regional arrivals, on the other hand, can be used to derive information about the mining practices in a region that is otherwise not accessible. Moreover, such analyses could be utilized for detecting unusual activities in the CTBT monitoring system.
机译：—频谱调制用作区分地震和单次爆炸的多次采矿爆炸的标准。采石场爆破的区域到达光谱中的特征可以通过发射图案的时空配置来解释，并且可以通过基于空间波形解相关和传播延迟（方向性）效应的模型进行探索。随着地震波到达的平均相位速度减小而调制减小的现象可以归因于随着相似的爆炸而减小的趋势，该趋势随着构成各个到达的射击图案的各个爆炸之间的距离增大而减小。调制模式相对于频率的重新缩放可以通过多普勒效应来解释。一方面，假定的射击模式布局和大小及其触发顺序之间的关系，以及各个区域之间调制特性的异同另一方面，到达时间可用于得出有关本来无法进入的地区的采矿实践的信息。而且，这种分析可用于检测CTBT监测系统中的异常活动。

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