PL18972B3 - Method of protection against coal dust explosion during coal bursting with explosive materials. - Google Patents

Method of protection against coal dust explosion during coal bursting with explosive materials. Download PDF

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Publication number
PL18972B3
PL18972B3 PL18972A PL1897233A PL18972B3 PL 18972 B3 PL18972 B3 PL 18972B3 PL 18972 A PL18972 A PL 18972A PL 1897233 A PL1897233 A PL 1897233A PL 18972 B3 PL18972 B3 PL 18972B3
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PL
Poland
Prior art keywords
coal
protection against
bursting
coal dust
dust explosion
Prior art date
Application number
PL18972A
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Polish (pl)
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Publication date
Application filed filed Critical
Publication of PL18972B3 publication Critical patent/PL18972B3/en

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Najdluzszy czas trwania patentu do 20 stycznia 1947 r.Wynalazek niniejszy dotyczy ulepsze¬ nia sposobu zabezpieczenia od wybuchu pylu weglowego podczas rozsadzania we¬ gla przy pomocy skroplonych lub zestalo¬ nych gazów, wedlug patentu Nr 15442, i ma ma celu poza zabezpieczeniem od wy¬ buchu pylu weglowego i gazów, równiez u- zyskamie szybkiego opadania gazów powy- buchowych.W patencie Nr 15442 opisany zostal sposób zapobiegania wybuchom pylu we¬ glowego i gazów podczas rozsadzania we¬ gla materjalami wybuchowemi przez obni¬ zenie temperatury wybuchu wskutek umie- szczenia w komorze wybuchowej lodu.Wedlug niniejszego wynalazku zabez¬ pieczenie przed wybuchem pylu weglowego i gazów uzyskuje sie równiez przez wy¬ tworzenie dzialaniem wybuchów warstwy niepalnej na scianach wylomu (miejsca pracy). Istota wynalazku polega na tern, ze w komorze wybuchowej zewnatrz lub wewnatrz ladunku wybuchowego umieszcza sie oprócz wody lub lodu substancje, po¬ chlaniajace wilgoc (hygroskopijne) i nie¬ palne, np. sól kuchenna, karnalit i tym po¬ dobne ciala, w ilosci od 50 do 80% ciezaru ladunku materjalu wybuchowego, jaki po¬ siada przed nasyceniem igo plynnym gazem.Substancje te po wyrzuceniu ich z komorywybuchowej sila wybuchu osiadaja w roz¬ pylonym stanie na scianach wylomu (miej¬ sca pracy) i, pochlaniajac pare wodna, za¬ równo wytworzona z wody lub lodu pod¬ czas wybuchu, jak i istniejaca W powietrzu, wiaza opadajacy pyl weglowy, pokrywajac wegiel izolacyjna warstwa trwala i nie¬ palna.Wskutek tego dzialaniem wybuchów stwarza sie srodowisko niepalne, w którem wybuch pylu weglowego i gazów kopalnia¬ nych jest uniemozliwiony, chocby plomien wybuchu, ze wzgledu na swa temperature, zdolny byl je zapalic.Poza tem wskutek pochlaniania pary wodnej, dymy powybuchowe opadaja na¬ tychmiast pozwalajac na szybkie przysta¬ pienie po wybuchach do pracy. Mozna za¬ pobiec wybuchom pylu weglowego i gazów równiez i bez uzycia lodu lub wody, przez umieszczenie w komorze wybuchowej we¬ wnatrz lub zewnatrz naboju wybuchowego substancyj higroskopijnych i niepalnych. PL PLThe longest patent period is January 20, 1947. The present invention relates to an improvement in the method of protection against coal dust explosions during coal blasting with the aid of liquefied or solidified gases, according to patent No. 15442, and its purpose is, apart from protection against coal dust and gas explosions, also to achieve a rapid fall of post-explosion gases. Patent No. 15442 describes a method of preventing coal dust and gas explosions during coal blasting with explosives by lowering the explosion temperature by placing ice in the explosion chamber. According to the present invention, protection against coal dust and gas explosions is also achieved by creating a non-flammable layer on the walls of the breach (workplace) by the action of explosions. The essence of the invention consists in that in the explosion chamber, outside or inside the explosive charge, in addition to water or ice, moisture-absorbing (hygroscopic) and non-flammable substances are placed, e.g. table salt, carnallite and similar bodies, in an amount of 50 to 80% of the weight of the explosive charge before it was saturated with liquefied gas. These substances, after being ejected from the explosion chamber by the force of the explosion, settle in a sprayed state on the walls of the breach (work place) and, by absorbing water vapor, both generated from water or ice during the explosion and existing in the air, bind the falling coal dust, covering the coal with a durable insulating layer and Non-flammable. As a result, explosions create a non-flammable environment in which coal dust and mine gas explosions are prevented, even if the explosion flame, due to its temperature, could ignite them. Furthermore, due to the absorption of water vapor, post-explosion fumes immediately subside, allowing for a quick return to work after explosions. Coal dust and gas explosions can also be prevented without the use of ice or water by placing hygroscopic and non-flammable substances in the explosion chamber, inside or outside the explosive cartridge.

PL18972A 1933-02-06 Method of protection against coal dust explosion during coal bursting with explosive materials. PL18972B3 (en)

Publications (1)

Publication Number Publication Date
PL18972B3 true PL18972B3 (en) 1933-10-31

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