File:Houille grisou ok.jpg

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Français : Représentation simplifiée des relations charbon-gaz-eau (nappe en bleue) et liens avec la surface et l'atmosphère selon la présence de failles, affleurement du charbon, puits ou galeries d'/expoitation/aération ancienne (avec éventuelle remontée et/ou fluctuations de nappes) et roches de couverture plus ou moins perméable/imperméable au gaz et/ou à l'eau. + effet de drainage (la nappe étant ici supposée circuler de la droite vers la gauche où l'on voit une cours d'eau ou un estuaire)
1 puits ou galerie non colmaté, ou affleurement naturel
2 faille naturelle
3 affaissements ou effondrement minier
4 rejet d'eaux pouvant contenir du méthane
5 Nappe (plus ou moins fluctuante)
6 Ancienne mine souterraine
7 remontée de nappe plus ou moins fluctuante
8 remontée de gaz par percolation dans une roche perméable au gaz (voir aussi Les Risques Miniers dans le Bassin Houiller du Nord – Pas de Calais, par Pierre-Yves GESLOT de la Direction régionale de l'environnement, de l'aménagement et du logement ; S3PI du Hainaut-Cambresis-Douaisis ; Prouvy - Rouvignies ; 1er octobre 2012</ref>)
English: ystem "Mine-coal-water-gas and link with surface / " with fractures and faults, more or less permeable covering strata and Water drainage
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Author Lamiot

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current13:47, 4 January 2014Thumbnail for version as of 13:47, 4 January 20141,277 × 718 (223 KB)Lamiot (talk | contribs)User created page with UploadWizard

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