Source time functions and interference from blast arrays

In this study, we review the principles of blast array design for vibration reduction and we present a parametric Laplace‐domain model to predict source time functions for mine blasts that accounts for the relation between charge weight and frequency. We developed the model for one of Europe's...

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Bibliographic Details
Published in:Geophysical Prospecting 2023-09, Vol.71 (7), p.1325-1337
Main Authors: Bleibinhaus, Florian, Trabi, Bernd
Format: Article
Language:English
Subjects:
Arrays
Correlation coefficient
Correlation coefficients
Doppler sonar
Iron ores
Time functions
Vibration
Vibration control
Waveforms
Weight
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Summary:In this study, we review the principles of blast array design for vibration reduction and we present a parametric Laplace‐domain model to predict source time functions for mine blasts that accounts for the relation between charge weight and frequency. We developed the model for one of Europe's largest iron ore mines, Mt. Erzberg, Austria, where we repeatedly monitored production blasts with arrays of 80–125 seismic sensors. Our model enables us to simulate not only resonance modes and Doppler shifts but also time‐domain waveforms. We use the normalized cross‐correlation coefficient of observed and synthetic waveforms to calibrate the model. The overall good match of our predictions suggests that our modelling of the source time functions could be used for more advanced predictions of the peak ground velocity, which is essential to designing charge weight distributions in modern mining operations.
ISSN:0016-8025
1365-2478
DOI:10.1111/1365-2478.13365