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CAMI-AFT : a scientific field experiment to calibrate real-time monitoring systems dedicated to the management of post-mining risks

Abstract : The CAMI-AFT experiment was performed to calibrate the physical parameters of real time microseismic systems installed at sites affected by post-mining instabilities, in the Lorraine iron basin (France) and to improve the processing tools as well as the data analyses. Blasts in the mine bottom, with known locations and energy release, were carried out at 6 instrumented sites. The recorded seismograms were used to test and calibrate numerical procedures to determine signal polarization - azimuth and incidence angle - by wave rotation methods. The data were also used to determine a multi-layered velocity model of the geological cover from a global inversion of P-wave arrival times. The performance of the 3D location program was tested by relocating the blasts using wave arrival times and polarisation angles in the determined, multi-layered velocity model. The data analysis for each site allowed the definition of an empirical law relating the source energy to the sensor energy.
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  • HAL Id : ineris-00973290, version 1
  • INERIS : EN-2008-036

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Isabelle Contrucci, Emmanuelle Klein, Pascal Bigarre, Armand Lizeur, Anthony Lomax, et al.. CAMI-AFT : a scientific field experiment to calibrate real-time monitoring systems dedicated to the management of post-mining risks. Symposium Post-Mining 2008, Feb 2008, Nancy, France. pp.NC. ⟨ineris-00973290⟩

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