Apport de la surveillance microsismique pour la compréhension des mécanismes d’effondrement dans les mines de sel exploitées par dissolution

Abstract : Surface collapses are a common phenomenon in salt solution mining operations and represent often the main source of risk to manage to ensure the safety of miners working on site. As part of a surface collapse experiment carried out at a salt solution mine at Cerville-Buissoncourt (Lorraine, France), Ineris aimed to develop and optimize collapsing hazard assessment based on microseimic monitoring. A series of innovative seismic signal processing approaches have been developed, particularly in terms of source location and mechanism analysis. The results indicate that the surface collapsing mechanism was controlled by the reactivation of pre-existing structures, oriented mainly NE-SW and NW-SE. The identification of this preferential orientation of fracturing represent an important element to adapt and plan upcoming exploitation on site and to better anticipate the nature of potential collapses of underground cavities.
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Jannes Kinscher. Apport de la surveillance microsismique pour la compréhension des mécanismes d’effondrement dans les mines de sel exploitées par dissolution. Rapport Scientifique INERIS, 2017, 2016-2017, pp.30-31. ⟨ineris-01869659⟩

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