Contrucci, Isabelle and Klein, Emmanuelle and Cao, Ngoc-Tuyen and Daupley, Xavier and Bigarre, Pascal (2011) Multi-parameter monitoring of a solution mining cavern collapse: First insight of precursors. Comptes Rendus Geoscience, 343 (1). pp. 1-10. DOI: https://doi.org/10.1016/j.crte.2010.10.007
Full text not available from this repository.Abstract
In order to improve our understanding of the large-scale ground failure phenomena caused by old underground mining works, a solution mine was instrumented in 2004 prior to its collapse as part of the mining scheme. A permanent monitoring system was set up, including a high-resolution microseismic network linked to a surface field-displacement measurement system. The large amount of data transmitted for on-line processing provided daily insight into the evolution of the geological system. First, microseismic activity showed upward progressive failure migration throughout 2008 without any significant surface movement. Second, after two days of intensive brine extraction, a high microseismicity and energy release rate marked the failure of a thin and very rigid bed at a depth of 120 m. This failure occurred 24 hours before the final collapse; it was followed by transient brine pressure signals, and by acceleration of the surface subsidence rate, reaching 1 milt in the final phase.
| Item Type: | Article |
|---|---|
| Subjects: | Methodology > Method and procesing > Technology-seismicity interaction Region > France > Lorraine salt basin Inducing technology > Underground mining |
| Project: | EPOS-IP > GISOS-SOLVEY: underground solution mining |