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Browsing by Subject "methane hazards"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Okresowe zmiany wydzielania metanu do wyrobiska ścianowego w czasie prowadzenia eksploatacji
    (Wydawnictwa AGH, 2011) Szlązak, Nikodem; Kubaczka, Czesław
    In longwalls there might be different methane hazard conditions, from very negligible to very risky ones, in case of which without using special control methods (ventilation, methane drainage) mining works could not be conducted. Safety in mines excavating coal seams saturated with methane depends on the proper estimation of methane hazard, conducted observations, hazard control as well as undertaken prevention methods. A weekly methane emission varies and is closely related to a mining process. At the beginning of the week there is a constant increase in methane emission, which reaches the maximum on the last day of excavation. During breaks in excavation, methane emission to a longwall decreases. Changes in methane emission in weekly periods can be described by means of the dependences presented in the article. However, in order to estimate its condition it is necessary to obtain information concerning earlier methane emission in longwalls.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Zagrożenie metanowe oraz jego profilaktyka w aspekcie wykorzystania metanu w polskich kopalniach węgla kamiennego
    (Wydawnictwa AGH, 2010) Szlązak, Nikodem; Korzec, Marek
    This article takes up a subject of methane hazard in Polish coal mines. CH4 in mines should be mainly considered as a methane hazard. Good preventive measures is the base to enable safe exploitation and the best one is methane drainage. In this article we present examples of locations of methane drainage boreholes in working face. The second part of this article touch upon a question of using it. Economic and ecological aspects determine the gas to be exploited. Moreover, we present various technologies to use methane and we have listed also systems using methane in Polish coal mines.