Podrobnosti záznamu

    Determination of full moment tensors of microseismic events in a very heterogeneous mining environment
    Kühn, D.
    Vavryčuk, Václav
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Roč. 589, March
    s. 33-43
    Projekt: FP7 Consortium Project AIM 230669, European Commission, XE3cav_un_auth*0301878
    Projekt: GAP210/12/1491, GA ČR, CZ3cav_un_auth*0285048
    Projekt: IAA300120801, GA AV ČR3cav_un_auth*0241180
    Rozsah: 11 s. : P
Předmětová kategorie
    finite-difference modelling
    moment tensors
    non-double-couple components
Klíčové slovo
Abstrakt (anglicky)
   The determination of source parameters and full moment tensors in mines is a difficult task, especially, when the velocity model of the mining environment is complex and strongly heterogeneous. The heterogeneities in the velocity model are usually caused by the presence of ore bodies, host rocks, tunnel systems and large excavations due to mining activity. The mined-out cavities introduce strong velocity contrasts in the model, cause multiple scattering of waves and result in a complex wave field with long coda waves. We have analysed five blasts and five induced microseismic events recorded at the Pyhasalmi ore mine, Finland, and suggest a strategy of successfully inverting for the seismic moment tensors. We compute accurate locations using an eikonal solver and perform the time-domain moment tensor inversion from full waveforms using a generalized linear inversion.
    AV ČR Brno, Geofyzikální ústav
Kód přispěvatele
    AV ČR, GFÚ
Zdrojový formát
Datum importu
    23. 10. 2014