Monitoring networks — Way for improving risk assessment from natural and manmade hazards: Case study salt mine Provadia (NE Bulgaria)

Paskaleva, I. and Nikolova, S. and Dimitrova, L. and Georgieva, G. (2010) Monitoring networks — Way for improving risk assessment from natural and manmade hazards: Case study salt mine Provadia (NE Bulgaria). Acta Geodaetica et Geophysica Hungarica, 45 (3). pp. 388-402. ISSN 1217-8977

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Abstract

This work focuses on the assessment of seismic risk and the need of long-term studies on the territory of the only terrestrial Bulgarian salt deposit (Provadia, NE Bulgaria, 27.43E, 43.2N) in connection with the observed higher seismic activity and probable manifestations of technogenic seismicity in the region.The necessity of regular monitoring of the geodynamic situation, surface subsidences and control of the mining excavations are discussed. A review of the manifestations of some observed problems due to the long-term mining is done. Some results of the performed monitoring at the site during the 1989–2009 are provided. Results of the analyses of the geological and seismotectonic situation, assessment of the stress-strain state of the salt diapir, surface subsidence, analysis of the recorded accelerograms, analyses of the seismic regime variation are discussed. The use of these analyses and their possible applications for the general stability assessment of the cavern-pillar system is formulated.

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