Wyniki wyszukiwania - BazTech

1

Aerological factors favouring the occurrence of endogenous fires on coal waste stockpiles

Skotniczny Przemysław

Archives of Mining Sciences

|

2020

|

Vol. 65, no. 4

901--916

EN

Coal waste stockpiles – as artificial formations being a result of the exploitation of underground coal deposits – are constantly influenced by external factors, such as rock mass movements affecting the stability of the stockpile body and changing weather conditions, leading to a cycle of aerological phenomena which intensify the self-heating of the deposited material. Together with the occurrence of external factors, the stored material is also characterised by a set of internal features (also called genetic) that have a direct impact on the kinetics of the self-heating reaction.The paper focuses mainly on the issue of external factors such as the inclination angle of the stockpile, erosion of the slopes and thermal insulation of the layers of the stored material, which affect the pheno-menon of self-heating of the material. Studies of impact of these factors on the thermal stability of coal waste stockpiles are important in the aspect of secondary exploitation of the stockpiles as well as during their reclamation or revitalisation. The numerical solutions presented in the paper should be treated as guidelines that define the directions of analysis for specific cases.

2

Przebieg i przyczyny endogenicznego pożaru węgla kamiennego na zrekultywowanym składowisku odpadów komunalnych w Katowicach

Ciesielczuk J., Janeczek J., Cebulak S.

Przegląd Geologiczny

|

2013

|

Vol. 61, nr 12

764–-772

EN

Slopes of the abandoned municipal waste landfill in the city of Katowice remediated in 1998 have been thermally active since 2007. The thermal activity was caused by spontaneous coal combustion within the sub-surface (0.5–1.5 m below ground level) layer of coal mine waste used for engineering the landfill. Exploitation of biogas from the landfill prior to thermal events may have enhanced exothermic oxidation of coal waste. The smoldering is the prevalent and persistent form of coal combustion in the landfill and is responsible for high emissions of CO (up to 3%), CO2 (>18%), methane and a suite of gaseous hydrocarbons. Attempts to extinguish coal fire did not prevent the advance of smoldering front at a rate of tens of metres per year.

3

Zagęszczalność i nośność wybranych odpadów powęglowych i pohutniczych

Gruchot A., Zawisza E.

Przegląd Górniczy

|

2007

|

T. 63, nr 11

26-30

PL

Praca zawiera wyniki badań uziarnienia, zagęszczalności i wskaźnika nośności CBR nieprzepalonych odpadów powęglowych z KWK "Powstańców Śląskich", żużli wielkopiecowych z huty "Boberek" i żużli pocynkowych z Zakładów Metalurgicznych w Trzebini. Analiza wyników badań wykazała duży wpływ intensywności zagęszczania na zwiększenie wartości parametrów geotechnicznych badanych materiałów. Jest to istotne w aspekcie oceny ich przydatności do celów budownictwa drogowego. Wykazano przydatność do tych celów badanych odpadów przemysłowych, przy czym najbardziej korzystnymi cechami geotechnicznymi odznaczają się żużle wielkopiecowe.

EN

The paper includes results of tests of size composition, compactibility and bearing capacity index CBR of un-burnt coal rejects from KWK (hard coal mine) "Powstańców Śląskich", blasting furnace slag from "Bobrek", steel plant and zinc metallurgy slag from Metallurgy Plant at Trzebinia. The analysis of tests results proved a significant influence of compactibility intensity on increase of geo-technical parameters of tested materials. It is essential in the aspect of their usefulness for highway engineering. Usefulness of tested industrial waste for this purpose has been shown, but the most favourable geo-technical properties shows blast furnace slag.