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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of microtremors within the Provadia region near a salt leaching mine (1996)
    Springer
    Pure and applied geophysics 147 (1996), S. 389-407 
    Details
    ISSN: 1420-9136
    Keywords: Monitoring of microearthquakes ; salt diapir ; seismotectonics of Provadia (Bulgaria)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract By analysis of microtremors recorded with digital seismological monitoring equipment near the Provadia salt diapir (Bulgaria), two groups of events showing different characteristics have been detected in the vicinity of the salt production area. The first group of events has low magnitudes and is located at a distance of about 1 km from the top of the salt diapir. These events show low stress drops. The second group of tremors is located outside the salt diapir. The corresponding magnitudes and stress drops are larger. The first class of events seems to be related to processes at the contour of the salt leaching caverns, whereas the origin of the second group seems to be connected with stress redistribution processes around the salt body. Based on this analysis, the tectonic model of the Provadia salt diapir has been modified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877491
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Seismological models for mining-induced seismic events (1989)
    Springer
    Pure and applied geophysics 129 (1989), S. 513-521 
    Details
    ISSN: 1420-9136
    Keywords: Mine-induced seismicity ; source models ; barrier/asperity models ; seismic moment ; rockbursts ; damaged area
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract One possibility to estimate and to interpret the source parameters of low-stress drop seismic events to use the barrier or the asperity model. These models serve as the description of seismic events in a in which a horizontal room and pillar mining method is used in great depth. An additional macroseismic parameter, the destroyed or damaged area in the mine, allows the estimation of the real static stress drop of mining-induced seismic events. This stress drop, derived from a simplified barrier-or asperity-model, appears to be a constant and a characteristic parameter for a given source region. On this base, a relation between the underground destruction or damages and the seismologically estimated parameters is derived and is used for the classification of the mining-induced seismic events.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874522
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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