Evaluation du risque d'émission de gaz à la surface du sol par les anciennes mines de charbon et mesures préventives

Abstract : In France legal procedure for concession abandonment requires from the owner studies which aims are identification and assessment of all risks caused by underground mine working to the surface infrastructures and to the population. In addition definition of mitigation techniques must be included in such studies. Among all the hazards due to old mines gas emission is probably the less "visible". A long time after mining has ceased firedamp can flow out from the remaining coal and accumulate in the underground reservoir along with other gases such as carbon dioxide. This gas can then flow out from the old workings towards the surface through shafts, adits or the overlaying strata due to water table raising after pumping stoppage, natural ventilation, atmospheric pressure changes. The main hazards associated with such a flow of gas and its potential accumulation in confined volumes in building are explosion, asphyxiation and intoxication. The paper describes the risk assessment methodology used in France and based on geological considerations and the specific mining context as well as prevention techniques implemented.
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  • HAL Id : ineris-00972380, version 1
  • INERIS : PU-2002-079

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Christian Tauziède, Zbigniew Pokryszka. Evaluation du risque d'émission de gaz à la surface du sol par les anciennes mines de charbon et mesures préventives. Journées Nationales de Géotechnique et de Géologie de l'ingénieur (JNGG 2002), Oct 2002, Nancy, France. ⟨ineris-00972380⟩

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