Delineation of Gas Prospective Sites in the Donets Basin, Ukraine

Privalov, V.A.; Panova, E.A.; Sachsenhofer, Reinhard F.; Izart, Alain; Antsiferov, A. V.; Antsiferov, V. A.

doi:10.3997/2214-4609.201401846

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Seams [ 2.0 m thick are rare. Recoverable coal resources extend up to 1.5 km depths (Sachsenhofer et al 2003;Antsiferov et al 2004;Privalov et al 2007;Sachsenhofer et al 2012;Dychkovskyi et al 2014;Savitsky 2015).…”

Section: Coal Waste Dumps In Ukrainementioning

confidence: 99%

Classification of fires in coal waste dumps based on Landsat, Aster thermal bands and thermal camera in Polish and Ukrainian mining regions

Nádudvari

Abramowicz

Fabiańska

et al. 2020

Int J Coal Sci Technol

View full text Add to dashboard Cite

A self-heating intensity index (SHII) based on the highest (pixel max.) and lowest (pixel min.) values taken from satellite thermal maps of burning coal waste dumps are proposed. The index enables the classification of such fires in Ukrainian- and Polish coal waste dumps. Both in Ukraine and in Poland, varying thermal intensities during 1985–2019 are revealed, using the SHII and following thermal intensity threshold values, namely, extreme thermal activity (> 7), advanced (3–7), moderate (3–1.5), initial (1.5–1), no activity (< 1). The SHII shows decreasing thermal activity in the selected Ukrainian coal waste dumps during 2017–2019. It aids in reconstructing the thermal history of the dumps. Analysis of satellite images revealed a large number of burning coal waste dumps in the Donetsk Coal Basin (Ukraine) with high thermal activity. Such burning likely reflects large amounts of organic matter and sulphides in the dumped material subjected to self-heating and self-burning processes, lack of compaction of the coal waste and/or high methane contents. Comparison of SHII values calculated from satellite- and drone thermal-camera images were compared to show that SHII from drone thermal images have much higher values than those from satellite images; the former have better resolution. Thus, SHII from Landsat- and drone images should be used separately in dump heating studies.

show abstract

Section: Coal Waste Dumps In Ukrainementioning

confidence: 99%

Classification of fires in coal waste dumps based on Landsat, Aster thermal bands and thermal camera in Polish and Ukrainian mining regions

Nádudvari

Abramowicz

Fabiańska

et al. 2020

Int J Coal Sci Technol

View full text Add to dashboard Cite

show abstract

“…Re- flectance studies of recent wildfire charcoals and experimental pyrolysis studies on charcoalified wood prove that inertinite reflectance increases with burning temperature, regardless of its morphology (Scott and Glasspool, 2007). A wildfire might produce a spectrum of different temperatures up to 1000 • C depending on the grade of exposition (Pyne et al, 1996). Zickler et al (2006) studied the influence of artificial pyrolysis treatments on the mechanical properties of wood cells via nanoindendation.…”

Section: Inertinitementioning

confidence: 99%

Nanoindentation study of macerals in coals from the Ukrainian Donets Basin

et al. 2018

View full text Add to dashboard Cite

This article discusses the mechanical properties of macerals in Carboniferous coals from the Ukrainian Donets Basin, covering a maturity range from 0.62 to 1.47 %Rr (vitrinite reflectance). The inherent inhomogeneity of geological samples requires characterization at the micro-/nanoscale, and hence material parameters, such as hardness H and reduced elastic modulus E r , were obtained from twelve coal specimens via nanoindentation tests. Different material properties and maturity trends were acquired for the individual maceral groups (vitrinite, inertinite, liptinite). The results indicate that apart from maturity, multiple factors like microstructural features and depositional environment control the mechanical properties of macerals in coals. H and E r of vitrinites show a complex relationship with maturity due to additional influence of microstructural features such as nanoporosity or mineral inclusions and complex changes in the organic matter structure with increasing rank. The mechanical behaviour of inertinites is mainly controlled by the prevailing conditions (temperature, exposure) during paleowildfires. E r and H of liptinites are strongly influenced by transformational processes related to devolatilization at low to medium rank, as well as later hydrocarbon generation. Variations in the depositional environment (e.g. increased organic S content due to marine influence) might play an additional role.

show abstract