Scholarly record
STUDIES INTO THE RELATIONSHIP BETWEEN THE TECHNICAL, PETROGRAHIC, GAS AND STRENGTH PARAMETERS OF COAL FROM SEAMS LOCATED IN THE UPPER SILESIAN COAL BASIN
Abstract
One of the properties of coal, used to evaluate the qualitative features of this mineral, is the microhardness of its particular components (macerals). Unfortunately, that parameter is relatively seldom used in analyses of this substance. Microhardness measurements are mostly used in research into metals, ceramics or composites; they are also sometimes used to analyse minerals and rocks. The objective of the paper presented here was to conduct coal's microhardness tests and to determine the relationship between strength parameters obtained in the course of these tests and other coal parameters commonly used in analyses of that substance. As part of the study, 22 coal samples from the mines of the Upper Silesian Coal Basin were analysed. In order to achieve the research objectives, the results of technical, gas and petrographic analyses were used, as well as the results of Vickers microhardness tests. As a result, the authors obtained 20 parameters which were subsequently correlated with one another. The conducted research shows that the strength parameters and the coalification degree correlate quite visibly with the gas parameters of coal, in particular with the sorption capacity (correlation on the level of 0.73). Slightly poorer results were obtained in the course of multiple correlations, determined between strength parameters and other analysed parameters. The preliminary research discussed in the paper shows that correlation between microhardness parameters and the results of petrographic, technical and gas analyses might constitute a significant complement to standard analyses of hard coal. However, the authors are of the opinion that further, more detailed studies into the issue are required.
Publication Impact Profile
Publication details
References13
Skoczylas N., Topolnicki J., The coal-gas system - the effective diffusion coefficient. International Journal Of Oil Gas And Coal Technology, 2016, 12, 4, 412-424
Kudasik M., Investigating Permeability of Coal Samples of Various Porosities under Stress Conditions. Energies 2019, 12, 4, 762
Skiba M., Młynarczuk M., Identification of macerals of the inertinite group using neural classifiers, based on selected textural features. Arch. Min. Sci., 2018, Vol. 63, No 4, pp. 827-837.
Kudasik M., Skoczylas N., Pajdak A., The repeatability of sorption processes occurring in the coal-methane system during multiple measurement series, Energies 2017, 10, 5, 661
Pajdak, A. Parameters of N2 and CO2 adsorption onto coal at various temperatures. In Proceedings of the 18th International Multidisciplinary Scientific Geoconference SGEM, Albena, Bulgaria, July 2018, pp. 633–640.
Mukherjee A.K., Alam M.M., Ghose S., Microhardness characteristics of Indian coal and lignite. Fuel, Volume 68, Issue 5, May 1989, Pages 670-673
Kožušníková A.,: Determination of microhardness and elastic modulus of coal components by using indentation method. Geolines 2009, 22, 2009
Godyń K., Kožušníková A.: Microhardness of Coal from Near-Fault Zones in Coal Seams Threatened with Gas-Geodynamic Phenomena, Upper Silesian Coal Basin, Poland, Energies 2019, 12, 9, 1756
Krevelen D.W. van, Coal – Typology – Physics – Chemistry – Constitution. Elsevier, 1993, Amsterdam.
Stach E., Makowsky M.-Th., Teichmüller M., Taylor G. H., Chandra D., Teichmüller R., Stach’s Textbook of Coal Petrology, Gebrüder Borntraeger, 1982. Berlin–Stuttgart.
Probierz, K. , Marcisz, M. , Sobolewski, A.: Rozpoznanie warunków geologicznych występowania węgla koksowego w rejonie Jastrzębia dla potrzeb projektu „Inteligentna koksownia” Biuletyn Państwowego Instytutu Geologicznego 2012, nr 452, s.245-256
Gabzdyl W.: Geologia złóż węgla: złoża świata. Warszawa: Polska Agencja Ekologiczna 1994, Poland
Oliver W.C. and Pharr G.M., An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mat. Res., 1992, 7(6): 1564-1583.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
