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| Titel |
Analysis of microseismic signals and temperature recordings for rock slope stability investigations in high mountain areas |
| VerfasserIn |
C. Occhiena, V. Coviello, M. Arattano, M. Chiarle, U. Morra di Cella, M. Pirulli, P. Pogliotti, C. Scavia |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 7 ; Nr. 12, no. 7 (2012-07-20), S.2283-2298 |
| Datensatznummer |
250010993
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| Publikation (Nr.) |
 copernicus.org/nhess-12-2283-2012.pdf |
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| Zusammenfassung |
The permafrost degradation is a probable cause for the
increase of rock instabilities and rock falls observed in recent years in
high mountain areas, particularly in the Alpine region. The phenomenon
causes the thaw of the ice filling rock discontinuities; the water deriving
from it subsequently freezes again inducing stresses in the rock mass that
may lead, in the long term, to rock falls. To investigate these processes, a
monitoring system composed by geophones and thermometers was installed in
2007 at the Carrel hut (3829 m a.s.l., Matterhorn, NW Alps). In 2010, in the
framework of the Interreg 2007–2013 Alcotra project no. 56 MASSA, the
monitoring system has been empowered and renovated in order to meet project
needs.
In this paper, the data recorded by this renewed system between 6
October 2010 and 5 October 2011 are presented and 329 selected microseismic events
are analysed. The data processing has concerned the classification of the
recorded signals, the analysis of their distribution in time and the
identification of the most important trace characteristics in time and
frequency domain. The interpretation of the results has evidenced a possible
correlation between the temperature trend and the event occurrence.
The research is still in progress and the data recording and interpretation
are planned for a longer period to better investigate the spatial-temporal
distribution of microseismic activity in the rock mass, with specific
attention to the relation of microseismic activity with temperatures. The
overall goal is to verify the possibility to set up an effective monitoring
system for investigating the stability of a rock mass under permafrost
conditions, in order to supply the researchers with useful data to better
understand the relationship between temperature and rock mass stability and,
possibly, the technicians with a valid tool for decision-making. |
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