Temporal variations of correlation dimensions of local mining seismicity with relation to the rockburst generating process

• Autorzy: Mortimer Z. , Luca L. De
• Języki publikacji: EN

Abstrakty

EN

The studies concern variations in the spatial and temporal distribution of clusters of local mining induced seismic activity. As the descriptor of such clusters, the fractal correlation exponent dimension has been chosen. The results of testing on Monte Carlo simulated fractal sets show that a small size of temporal window allows us to get reliable estimates of correlation dimension and to study its variation as a short-time period precursor to rockbursts. The correlation between changes in time of spatial epicentre distribution D2 and temporal distribution Dt of epicentre and the occurrence of strong events was found, but not for the all data analysed. We cannot confirm the existence of some systematic evidence, but we found that an anomalous state of the fractal dimension could be observed prior to large events; however, there are no well determined features in its trend. Analysing the distribution of the intertime between the consecutive events, the dimension of its strange attractor has been calculated.

Słowa kluczowe

EN

mining seismicity; tremor location; fractal analysis

• Wydawca: Instytut Geofizyki PAN
• Czasopismo: Acta Geophysica Polonica
• Rocznik: 1999
• Tom: Vol. 47, nr 3
• Strony: 273--282
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Mortimer Z.

autor

Luca L. De

• Institue of Geophysics University of Mining and Metallurgy 30-059 Kraków, Al. Mickiewicza 30 tel. [phone],