Les formes d'affaissement minier dans le bassin ferrifère luxembourgeois : essai de géomorphologie minière

Abstract : This geomorphological investigation focuses on the mining subsidence forms which have occurred in the Luxembourg mining basin since the middle of the 19th century and are particularly numerous and diverse. The mapping of the mining subsidence forms has shown that both their number and their type vary all over the mining basin. The changing of the environmental conditions as well as the mining regulations and techniques have to be held reponsible for these differences. Ten investigated sites have made it possible to define the mechanisms which have generated the different subsidence forms. Multiple causes have emerged during this analysis, depending primarily on the mining techniques and the rock mechanics of the overburden, both of which are responsible for the downward earth movements. The horizontal earth movements then change the initial shape of the subsidence forms according to the local environmental conditions (the nature of the superficial deposits, the rock fissuration patterns and the stepness of slopes among others) and depending on their age. Furthermore, man has altered the collapse sinks and the cracks where he intended to reuse the land previously damaged by mining subsidence occurrences. This effort rehabilitation has led to a new widespread type of "attenuated forms". On top of the authentic subsidence forms pseudoforms can be found in the same areas which resemble the former ones to a point where they are easily mistaken for them. They are, however, linked to over types of mining activity. In order to classify the vast number of diverse subsidence forms a typology in terms of authentic forms, derived forms and pseudoforms has been worked out.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/BUL_T_2000_0025_STORONI.pdf
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https://hal.univ-lorraine.fr/tel-01776276
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Submitted on : Tuesday, April 24, 2018 - 3:56:04 PM
Last modification on : Wednesday, April 25, 2018 - 1:32:32 AM

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Alexandre Storoni. Les formes d'affaissement minier dans le bassin ferrifère luxembourgeois : essai de géomorphologie minière. Géographie. Université Nancy 2, 2000. Français. ⟨NNT : 2000NAN21025⟩. ⟨tel-01776276⟩

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