Record details

Title
    Mining induced seismicity: moment tensor vs. shear-tensile/implosion model. Case study of Ridgeway, E. Australia gold mine
Author
    Capes, G.
    Lötter, E. C.
    Šílený, Jan
Conference
    International symposium on rockbursts and seismicity in mines (8. : 01.09.2013-07.09.2013 : Saint-Petersburg, Rusko)
Language
    anglicky
Publication type
    konferenční příspěvek (zahraniční konference)
Source title - monograph
    Proceedings of the 8th International Symposium on rockbursts and seismicity in mines
Pages
    S. 189-193
Notes
    Projekt: GAP210/12/2235, GA ČR3cav_un_auth*0284894
    Rozsah: 5 s. : P
Subject category
    alternative source models
    configuration of stations
    earthquake mechanism
Keyword
    Australia
    Case
    Gold
    Induced
    Mine
    Mining
    Model
    Moment
    Ridgeway
    Seismicity
    Shear-tensile/implosion
    Study
    Tensor
    Vs
Abstract (in english)
   The mechanism of a seismic event is a parameter of crucial importance retrieved from seismic data as it carries information on the way of fracturing of the rock mass in its hypocenter. Taking advantage of the linearity of the inverse task, the moment tensor (MT) has become the default tool for description of the mechanism of natural earthquakes and induced events as well, including rockbursts in mines. The MT is a general dipole source, but for practice it may be too general, its generality causing troubles during its reconstruction from noisy data in the inverse process, which may be additionally ill-conditioned due to inexact hypocenter location and/or availability of a rough velocity/attenuation model only. Then, the retrieved source may be biased, containing artifacts of a low-quality data or the inconsistent inverse problem. It seems reasonable to assume a simpler source model directly describing the physical phenomena anticipated in the particular focus.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    23. 10. 2014