The Limiting Content of Combustibles to Prevent Minestone from the Spreading of Fire

Boleslav Taraba (), Petr Gřunděl and Gabriela Zelenková
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Boleslav Taraba: Faculty of Science, University of Ostrava, 30. dubna 22, 701 03 Ostrava, Czech Republic
Petr Gřunděl: Ostravská těžební, a.s., Sládkova 1920/14, 702 00 Ostrava, Czech Republic
Gabriela Zelenková: Faculty of Science, University of Ostrava, 30. dubna 22, 701 03 Ostrava, Czech Republic

Energies, 2023, vol. 16, issue 13, 1-12

Abstract: The limiting content of combustibles to spread/suppress the fire in the minestone of the coal tailing dump (gangue) was studied. This knowledge appears crucial mainly when deciding on the possible usage of minestone as fireproof material for engineering purposes. Theoretical analysis, laboratory experiments as well as scale (in situ) considerations were performed. In the laboratory, a model series of coal–mineral matter mixtures and six representative minestone samples of coal tailing dump (gangue) were investigated. The thermoanalytical (TG/DSC) method was used to evaluate the content of combustibles with their energetic equivalent, EEC (%). The EEC has been suggested as a proper way to quantify the content of combustibles in the samples. Based on the original combustion calorimetric test, an EEC value of 7–9% was found to be a limit between fireproof and fire spreading minestone in a laboratory, while only 2% of combustibles resulted as the limit from the theoretical analysis. On the other hand, respecting real conditions of thermally active dump (Heřmanice tailing coal dump), the laboratory limit of 7–9% of EEC was then assessed to shift to the value of about 10 ± 1% for practice.

Keywords: coal waste dump; combustible matter; underground fire; calorimetry (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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