PL18972B3

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

Info

Publication number: PL18972B3
Application number: PL18972A
Authority: PL
Filing date: 1933-02-06
Publication date: 1933-10-31

Description

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. PLThe longest term of the patent until January 20, 1947. The present invention relates to the improvement of the method of protection against coal dust explosion during coal blasting by means of liquefied or solidified gases, according to the patent No. 15442, and is intended beyond the protection against leakage. the explosion of coal dust and gases will also increase the rapid descent of explosive gases. Patent No. 15442 describes a method of preventing coal dust and gas explosions during the bursting of coal with explosive materials by lowering the temperature of the explosion by placing in In accordance with the present invention, protection against the explosion of coal dust and gases is also obtained by creating a non-combustible layer on the walls of the breach (workplace) by the action of explosions. The essence of the invention consists in the fact that in the explosive chamber outside or inside the explosive charge, apart from water or ice, substances which absorb moisture (hygroscopic) and non-flammable, e.g. table salt, carnallite and similar bodies, in the amount of from 50 to 80% of the weight of the explosive charge that it carries before being saturated and then with liquid gas. These substances, after being thrown out of the explosion chamber, settle in a diffused state on the walls of the breach (workplace) and, absorbing water vapor, both formed from water or ice during an explosion, and existing in the air, binds the falling coal dust, covering the carbon with a durable and non-flammable insulating layer. As a result, the action of the explosions creates a non-flammable environment in which the explosion of coal dust and gases mines is prevented, for example the flame of an explosion, due to its temperature, was able to ignite them. Moreover, due to the absorption of water vapor, the explosion fumes fall immediately allowing ac to work quickly after explosions. It is possible to prevent coal dust and gas explosions also and without the use of ice or water by placing hygroscopic and non-flammable substances in the explosive chamber inside or outside the explosive cartridge. PL

Claims

Patent claims. 1. The method of preventing the explosion of coal dust and gases during the bursting with explosives according to the patent No. 15442, characterized in that a cartridge with condensed air and a charge of one or more are placed in the explosion chamber with or without ice. hygroscopic and non-flammable substances, such as table salt, carnallite, etc., in the amount of 50 to 80% of the weight of the explosive cartridge, not yet saturated with liquefied gases, which substances after an explosion absorb water vapor and settle on the walls of the workplace, creating a permanently moist and non-flammable insulating layer.

2. A variant of the method according to claim 1, characterized in that, instead of ice, water or ice and water are placed in the explosion chamber,

3. The method according to p. 1 and 2, which means that non-flammable substances which absorb moisture are placed in the explosive charge, or externally in the explosive chamber.

4. The method according to p. 1 - 3, in other words, that the non-flammable substances, which absorb moisture, are placed in the explosive chamber outside the explosive cartridge so that they are located in front or behind the explosive part of the cartridge, at both ends, surround it with all sides, separate the individual explosive charges, or their arrangement is a combination of the above-mentioned arrangements. Ryszard Badowski. Deputy: Inz. Th. Raczynski, patent attorney. Printing by L. Boguslawski and Ski, Warsaw. PL