Évaluation de la résistance à long terme des piliers des mines de fer du bassin lorrain

Abstract : After one hundred years of activity, mining in the Lorraine iron ore basin has ceased. Following several surface instabilities, investigations into methods of evaluating underground long-term stability were initiated few years ago. This paper concerns the latest Abstract developments in the field of pillars stability evaluation as input into the risk assessment procedures. The methodology is based on the empirical back analysis philosophy developed by Salamon in South African coalfields afer the Coalbrook disaster. A strength formula resulting in the best possible separation of data bases of safety factors of failed and intact pillar cases was determined. The first results appear quite promising. Work is ongoing into the kinematics of failure as well as the distinction between different zones of the basin and the development of a “Failure Potential Index”.
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Christophe Didier, Frédéric Poulard. Évaluation de la résistance à long terme des piliers des mines de fer du bassin lorrain. Rapport Scientifique INERIS, 2012, 2011-2012, pp.63-65. ⟨ineris-01869427⟩

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