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Geology of the Nord-Pas de Calais coalfield area (BRGM 1/1.000.000 scale geological map, source http://infoterre.brgm.fr). Mining concessions are shown as dark red polygons.
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Rising groundwater in abandoned mines may result in ground movements at the surface overlying underground works. Feedbacks on several abandoned coalfields show that ground uplift is generally observed, reaching in some cases several centimetres or more. Although such ground movements, slow and associated with slight slopes, are not expected to gene...
Context in source publication
Context 1
... the most important natural factor remains local geology. Figure 5 shows the geology characterizing the Nord-Pas de Calais region. The coalfield is located close to the boundary between upper Cretaceous (green colour, mainly at the SW of the coal basin) and lower Eocene (orange colour, dominating the north-eastern part of the coal basin). ...
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