PL101610B2 - - Google Patents
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- Publication number
- PL101610B2 PL101610B2 PL101610B2 PL 101610 B2 PL101610 B2 PL 101610B2 PL 101610 B2 PL101610 B2 PL 101610B2
- Authority
- PL
- Poland
- Prior art keywords
- coal
- dust
- face
- explosion
- methane
- Prior art date
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Description
Przedmiotem wynalazku jest sposób hamowania wybuchu pylu weglowego w podziemnych wyrobiskach górniczych.The subject of the invention is a method of inhibiting coal dust explosion in underground workings mining.
Znany sposób hamowania wybuchu pylu weglowego polega na tym, ze w wyrobiskach górniczych wykonu¬ je sie specjalne zapory wodne lub pylowe. Zapora sklada sie z zestawu pólek, napelnionych pylem kamiennym lub woda, odpowiednio rozmieszczonych w przekroju wyrobiska. Dodatkowo w przodkach weglowych i ich sasiedztwie stosuje sie opylanie pylem kamiennym. W przypadku powstania wybuchu nastepuje rozproszenie w wyrobisku pylu kamiennego lub wody. Plomien wybuchu doszedlszy do srodowiska niepalnego wygasa.The known method of inhibiting the explosion of coal dust is based on the fact that in mining excavations it is possible to work there are special dams of water or dust. The dam consists of a set of shelves filled with rock dust or water, appropriately distributed in the cross-section of the excavation. Additionally, in coal faces and theirs the neighborhood is dusted with stone dust. In the event of an explosion, dispersion occurs in the pit of rock dust or water. The explosion flame, reaching a non-flammable environment, extinguishes.
Niedogodnoscia opisanego sposobu jest koniecznosc mielenia kamienia oraz jego transport.The disadvantage of the described method is the necessity to grind the stone and its transportation.
Istota wynalazku polega na opracowaniu sposobu, w którym przodki weglowe opyla sie popiolem lotnym, bedacym odpadem paleniskowym z elektrowni spalajacych wegiel kamienny, w ilosci 350 kg/m2 powierzchni w przodkach metanowych lub 200 kg/m2 w przodkach nie metanowych. Ponadto popiolem tym wypelnia sie pólki zapór, umieszczonych w wyrobiskach korytarzowych.The essence of the invention consists in developing a method in which coal faces are dusted with fly ash, which is furnace waste from power plants burning hard coal, in the amount of 350 kg / m2 of surface in methane longwall or 200 kg / m2 in non-methane longwall. In addition, this ash fills up shelves of dams, located in corridors.
Zaleta sposobu hamowania wybuchu pylu weglowego w podziemnych wyrobiskach górniczych jest to, ze zastosowany popiól ma zdolnosc dluzszego utrzymywania sie w przestrzeni wyrobiska ze wzgledu na wieksza lotnosc w porównaniu z pylem kamiennym. Stwarza to lepsze warunki zapobiegania rozwojowi wybuchu pylu weglowego i gaszenie towarzyszacego wybuchowi plomienia. Ponadto zaleta sposobu wedlug wynalazku jest wykorzystanie bezuzytecznych zasobów popiolu lotnego z zakladów energetycznych skladowanego na sklado¬ wiskach.The advantage of the method of inhibiting coal dust explosion in underground mining excavations is that the ash used has the ability to stay longer in the excavation space due to its greater size airworthiness compared to rock dust. This creates better conditions for preventing the development of a dust explosion coal and extinguishing the accompanying flame. Moreover, an advantage of the method according to the invention is the use of useless resources of fly ash from energy plants stored in the warehouse wiskach.
Sposób hamowania wybuchu pylu weglowego w podziemnych wyrobiskach górniczych wedlug wynalazku, polega na zaslanianiu ziarn pylu weglowego przed dzialaniem promieniowania cieplnego. Popiól lotny odgrywa role ekranu uniemozliwiajacego promieniowanie ciepla, pochlaniajac równoczesnie czesc ciepla. Popiól utrudnia dyfuzje tlenu do plonacych czastek pylu weglowego, utrudniajac równoczesnie dyfuzje gazów palnych z pylu weglowego. Rozklad zwiazków wapnia, znajdujacych sie w popiele lotnym powoduje odbiór ciepla. Wydzielaja¬ cy sie z reakcji dwutlenek wegla dziala równiez hamujaco na rozwój plomienia.9 101610Method of inhibiting coal dust explosion in underground mining excavations according to the invention, consists in covering the coal dust grains against thermal radiation. Fly ash plays the role of the screen to prevent heat radiation, while absorbing some of the heat. The ash makes it harder diffusion of oxygen to the burning particles of coal dust, while hindering the diffusion of combustible gases from the dust carbon. The decomposition of calcium compounds in the fly ash causes heat removal. Secrete Carbon dioxide from the reaction also has a flame retardant effect. 9 101610
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