DINAMIKA GIBANJA PLINOVA OD MJESTA SPONTANOGA SAMOZAPALJENJA UGLJENA NA RADILIŠTIMA
| Autor: | Viktor Kostenko, Tetiana Kostenko, Yuriy Gamiy, Sergii Tsvirkun, Maksym Udovenko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:TN1-997
Flow (psychology) Mixing (process engineering) Underground fires simulation carbon monoxide Fire Dynamics Simulator mine working coal spontaneous combustion underground fires Mining engineering Coal Spontaneous combustion lcsh:Mining engineering. Metallurgy Water Science and Technology Thermodynamic process business.industry lcsh:QE1-996.5 Coal mining Geology Gas dynamics Geotechnical Engineering and Engineering Geology lcsh:Geology General Energy fire dynamics simulator General Earth and Planetary Sciences Environmental science Podzemni požari simulacija ugljikov monoksid programski paket Fire Dynamics Simulator radilište rudnika ugljena samozapaljenje business |
| Zdroj: | Rudarsko-geološko-naftni Zbornik, Vol 36, Iss 2, Pp 109-117 (2021) Rudarsko-geološko-naftni zbornik Volume 36 Issue 2 |
| ISSN: | 1849-0409 0353-4529 |
| Popis: | The object of this paper is to study the specificity of the dynamics of carbon monoxide in mining to determine the location of the source of coal self-heating or spontaneous combustion. The Fire Dynamics Simulator software package was used to model the gas hazard of coal mine workings. Given the typical details for the western coal basin of Donbas geo metric dimensions of workings, properties of coal, etc., a model of a fragment of emergency mining of a coal mine was created, which allows for the display of geometric and physical similarity to processes in actual mine workings. The results of the simulation for the studied scenarios with different air supply systems related to the detection and location of sources of self-heating or spontaneous combustion in the coal mine workings were obtained and analysed. It was established that low-density fire gases are concentrated in the vault of the workings, where they slowly dissolve in the air, with the dissolution process being linear. It was revealed that air velocity up to 0.67 to 0.7 m/s contributes to the formation of fire gas flows, which move towards the ventilation flow, almost without mixing, which is referred to as bifurcation. Numerical parameters of fire gas dynamics in near-real conditions were established, which can become a basis for the detection and location of sources of endogenous thermodynamic processes in mine workings. U radu se analizira posebnost dinamike ugljikova monoksida u rudarstvu kako bi se odredio smještaj izvorišta samozagrijavanja i samozapaljenja ugljena. Uporabljen je programski paket Fire Dynamics Simulator, kojim je modeliran rizik od plina na radilištu rudnika. Ogledno istraživanje načinjeno je na zapadu ugljenih bazena Donbasa uzimajući u obzir geometrijske dimenzije radilišta, svojstva ugljena itd. Stvoren je model za izvanredno rudarenje ugljena u izvanrednim okolnostima koji se može primijeniti na stvarne uvjete (geometriju, fizička svojstva) ugljenokopa. Simulacija je izvedena s nekoliko scenarija opskrbe zrakom s obzirom na smještaj detektora i izvora samozagrijavanja ili samozapaljenja. Utvrđeno je kako su zapaljivi plinovi male gustoće nakupljeni uz svod radilišta, gdje se sporo miješaju sa zrakom tijekom procesa koji je linearan. Prikazano je kako brzina strujenja zraka od 0,67 do 0,7 m/s pridonosi stvaranju toka zapaljivih plinova koji se tada gibaju prema ventilacijskome sustavu gotovo bez miješanja, ali s pojavama bifurkacije. Brojčane vrijednosti dobivene simulacijom za dinamiku zapaljivih plinova odgovaraju gotovo potpuno stvarnim uvjetima, te model može biti temelj za opažanje i smještanje endogenih (unutarnjih) termodinamičkih procesa na rudarskim radilištima. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|