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Browsing by Subject "decrease and increase of resources"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zasoby węgla kamiennego w GZW w latach 1991-2005
    (Wydawnictwa AGH, 2007) Gabzdyl, Wiesław
    The restructuring of coal mining in the Upper Silesian Coal Basin caused considerable changes in the structure and size of bituminous coal resources. The decrease of geological, recoverable, developed and non-developed resources and the increase of non-recoverable resources has been showed. In the years 1991-2005 geological resources decreased of ca 21 mld Mg, recoverable resources of ca 23 mld Mg, developed resources of over 10 mld Mg and non-developed resources of over 12 mld Mg. In the same time there has been an increase of the non-recoverable resources. The size of resources in undeveloped deposits became real and amount increased to 18.6 mld Mg. Main influence on the decrease had the classifications and strikes off the registry.