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Communication Dans Un Congrès Année : 2003

On the surface noxious gas emissions from the old iron mines

Résumé

A study carried out in the iron basin of Lorraine (North-East of France) highlighted the existence of under-oxygenated and noxious gas emissions (carbon dioxide, radon...) in vast built-up areas related to former mine workings. Site investigations showed that the gas flow was mainly due to natural thermal air circulation between old mines and external atmosphere. The main hazards associated with this flow of gas and its potential accumulation in confined volumes in buildings are asphyxiation and intoxication. A further study is in progress in order to better understand the origin of the gas generation within the old iron mine workings. Following the first hypothesis, the carbon dioxide emission is mainly due to the specific hydrogeo- chemical process associating the pyrite oxidation with the acid dissolution of carbonates.

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Dates et versions

ineris-00972431 , version 1 (03-04-2014)

Identifiants

  • HAL Id : ineris-00972431 , version 1
  • INERIS : PU-2003-126

Citer

Zbigniew Pokryszka, David Grabowski. On the surface noxious gas emissions from the old iron mines. 30. International Conference of Safety in Mines Research Institutes, Oct 2003, Johanesbourg, South Africa. pp.311-321. ⟨ineris-00972431⟩

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