DD264856A1

DD264856A1 - PROCESS FOR PREVENTING THE DISPOSAL OF FIRE AND FOR PREVENTING BRANDING

Info

Publication number: DD264856A1
Application number: DD30932087A
Authority: DD
Inventors: Joachim Schmidt; Harri Martin; Reiner Hoffmann
Original assignee: Bergbausicherheit Inst
Priority date: 1987-11-23
Filing date: 1987-11-23
Publication date: 1989-02-15

Abstract

Die Erfindung betrifft ein Verfahren zur Bekaempfung von Braenden in langgestreckten tunnelartigen Raeumen, vorzugsweise in Bandstrecken unter Tage. Das Wesen der Erfindung besteht darin, dass in Richtung des fortschreitenden Brandes durch selbsttaetig in Wirkstellung gebrachte Stroemungswiderstaende wie Wettersperren, die Stroemungsgeschwindigkeit maximal 0,25 m/s betraegt, und die vorzugsweise thermischen Ausloeseelemente fuer die Wettersperre mindestens 70 m vor dieser in Wetterrichtung angeordnet sind. Der Eintritt der durch Drosselung erzielten Stroemungsgeschwindigkeit bei der oder den Wettersperren in Wirkstellung ist durch Versuche zu ermitteln.The invention relates to a method for combating braises in elongated tunnel-like rooms, preferably in underground sections. The essence of the invention is that in the direction of the progressive fire by selbstoustig brought into active position Stroemungswiderstaende as weather barriers, the flow rate is not more than 0.25 m / s, and preferably thermal Ausloeseelemente for weather lock at least 70 m are arranged in front of this in the weather direction , The occurrence of the flow rate achieved by throttling at the weather barrier (s) in operative position is to be determined by experiments.

Description

Anwendungsgpbj^der Erfindung fAnwendungsgpbj ^ invention f

Die Erfindung betrifft ein Verfahren zur Verhinderung der Brandausbreitung und zur Bekämpfung von Bränden vorzugsweise an Bandanlagen in untertägigen Grubenbauen sowie ähnlichen langgestreckten tunnelartigen Räumen mit streckenförmiger Brandlast in allen Bereichen der Industrie.The invention relates to a method for preventing the spread of fire and to combat fires preferably on conveyor systems in underground mining operations and similar elongated tunnel-like spaces with stretch fire load in all areas of industry.

II

Charakteristik des bekannten Standes der TechnikCharacteristic of the known state of the art

II

Es sind Verfahren insbesondere aus dem Bergbau bekannt, bei denen die betroffenen Bereiche durch das Setzen von Dämmen abgeriegelt werden. Diese Maßnahme ist mit einem hohen Realisierungsaufwand verbunden und kann erst mit hohem Zeitverlust wirksam werden. An exponierten Stellen wurden auch, um die Ausbreitung von Bränden zu verhindern, mit dichtschließenden Türen und aufwendigen Mechanismen für den technologisch bedingten Banddurchgang versehene feuerfeste Trennwände errichtet. Speziell bei Bandanlagen ist jedoch ein hinreichend dichter Anschluß auch mit sehr hohem Aufwand durch spezielle Bandkonstruktionen kaum zu erreichen. Hinweise über das zulässige Maß an Undichtheiten wurdon bisher nicht bekannt. '' Ziel der ErfindungThere are methods known in particular from mining, in which the affected areas are sealed off by the setting of dams. This measure is associated with a high implementation cost and can take effect only with a high loss of time. At exposed sites, fire-proof partitions were also constructed to prevent the spread of fires, with tight-fitting doors and elaborate mechanisms for technologically conditioned strip passage. Especially in strip systems, however, a sufficiently tight connection is difficult to achieve even with very high effort by special tape constructions. Information about the permissible level of leaks wurdon not previously known. '' Aim of the invention

Die Erfindung hat das Ziel, mit minimalem Aufwand und höchster Wahrscheinlichkeit Brände in langgestreckten tunnelartigen Räumen, insbesondere an Bandanlagen unterTage, zum Erlöschen zu bringen.The invention has the goal to extinguish fires in elongated tunnel-like spaces, in particular on conveyor systems underground with minimal effort and the highest probability.

Darlegung des Wesens der ErfindungExplanation of the essence of the invention

Der Erfindung liegt die Aufgabe zugrunde, durch Eingriffe in die Wetterführung im Bereich eines Brandes in tunnelartigen Räumen wie Strecken unter Tage, dr s Feuer zum Verlöschen zu bringen.The invention has for its object to bring by interfering with the weather in the area of a fire in tunnel-like spaces such as underground routes, dr s fire to extinguish.

Erfindung8gemäß wird die Aufgabe dadurch gelöst, daß im Falle eines Brandes vorzugsweise selbsttätig eine Drosselung der Wetter (Luft) erfolgt, die deren Strömungsgeschwindigkeit auf maximal 0,25 m/s reduziert. Dieser Wert ist in einem Stauraum von mindestens 70m Länge einzuhalten. Für die Drosselung eignen sich vorzugsweise selbsttätig wirkende Wettersperren, deren Anordnung auch mehrfach vorzunehmen ist. Insbesondere bei schwierig abzudichtenden Bandanlagen sind diese mit einem Öffnungsverhältnis von kleiner 0,025 auszuführen. Die an der Wettersperre zulässige Depression beträgt 200Pa, die zu kontrollieren ist. Bei Überschreitung dieses Wertes ist mindestens eine weitere Wettersperre in Wirkstellung zu bringen.According to the invention, the object is achieved in that, in the event of a fire, the weather (air) is preferably automatically throttled, reducing its flow velocity to a maximum of 0.25 m / s. This value must be maintained in a storage space of at least 70m in length. For throttling are preferably self-acting weather barriers whose arrangement is also made multiple times. In particular, in difficult to be sealed belt systems, these are to be carried out with an aperture ratio of less than 0.025. The depression allowed on the weather barrier is 200Pa, which is to be controlled. If this value is exceeded, at least one additional weather lock must be put into effective position.

Ausführungsbeispielembodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. In der dazugehörigen Zeichnung zeigtThe invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing shows

Fig. 1: einen Brand in einer Sandstrecke unterTage und die zum Verlöschen vorgesehen Mittel im Prnzip. bio Figur 1 zeigt eine untertägige Strecke 1 mit einer darin installierten Bandanlage 2. Der durch Reibunp einer gummierten Tragrolle entstandene Brand 3 breitet sich in Wetterrichtung aus. Im weiteren Verlauf wird das auf thermischer Basis arbei.ende Auslöseelement 4 von heißen Brandgasen erreicht. Durch dessen Ansprachen wie Lösen des Halteseiles, wird die Wettersperre 5 unmittelbar in Wirkstellung gebracht. Die Wettersperre 5 verschließt den Querschnitt der untertägigen Strecke 1 bis auf eine Restöffnung von kleiner 2,5%. Durch die Wettersperre 5 wird die Wettermenge gedrosselt und deren Strömungsgeschwindigkeit auf maximal 0,25 m/s reduziert. Wird dieser Wert nicht erreicht, sind weitere VJ/ettL'sperren 5 in Wirkstellung zu bringen.Fig. 1: a fire in a stretch of sand under days and provided for extinguishing means in Prnzip. FIG. 1 shows an underground track 1 with a belt installation 2 installed therein. The fire 3 caused by the friction of a rubberized carrying roller spreads out in the direction of the weather. In the further course, the thermally based arbei.ende triggering element 4 is achieved by hot combustion gases. Through his speeches such as loosening the tether, the weather lock 5 is brought directly into operative position. The weather lock 5 closes the cross section of the underground route 1 except for a residual opening of less than 2.5%. Due to the weather lock 5, the amount of weather is throttled and their flow velocity is reduced to a maximum of 0.25 m / s. If this value is not reached, further VJ / ettL'sperren 5 in active position to bring.

Infolge der verringerten Zuführung von Sauerstoff und dessen Verbrauch durch den Verbrennungsvorgang und die Anreicherung inerter Gase verlöscht der Brand 3 oder vermindert stark seine Intensität, und seine Ausbreitungsgeschwindigkeit geht gegen Null. Zum Schutz der Wettersperre 5 vor Brandeinwirkung ist das Auslöseelement 4 mindestens In 70 m Entfernung vor dieser angeordnet, wodurch gleichzeitig ein entsprechender Stauraum gegen den Brand 3 gegeben ist. i r Die notwendige Dichtheit der Wettersperre 5 wird durch Versuch in deren Wirkstellung bestimmt und die sich einsteilende 'As a result of the reduced supply of oxygen and its consumption by the combustion process and the enrichment of inert gases, the fire 3 or greatly reduces its intensity, and its propagation speed approaches zero. To protect the weather lock 5 from the action of fire, the triggering element 4 is arranged at least in 70 m distance in front of this, whereby at the same time a corresponding storage space against the fire 3 is given. The necessary tightness of the weather barrier 5 is determined by experiment in its active position and the dividing '

Depression sowie die reduzierte Strömungsgeschwindigkeit der Wetter gemessen. ! 3Depression as well as the reduced flow rate of weather measured. ! 3

Claims

1. A method for preventing the spread of fire and to combat fires in elongated spaces such as underground routes, by throttling the weather (air) stream, characterized in that in case of fire at least one provided in Brandausbreitungsrichtung, on the fire (3) responsive trigger element (4 * to a throttling of the weather preferably by weather barriers (5) leads, in front of which a storage space (6) of at least 70m in length forms, in which a flow rate of not more than 0.25 m / s prevails.

2. The method according to claim 1, characterized in that the weather barrier (5) has an opening ratio smaller C, 025 and which is based on her depression below 200Pa.

3. The method according to claim 2, characterized in that means are provided which bring at least one further weather lock (5) in operative position at a depression vpn about 200 Pa.

^ * - ψ For this 1 page drawing

Field of application of the invention

The invention relates to a method for preventing the spread of fire and to combat fires preferably on conveyor systems in underground mining operations and similar elongated tunnel-like spaces with stretch fire load in all areas of industry.

Characteristic of the known state of the art

There are methods known in particular from mining, in which the affected areas are sealed off by the setting of dams. This measure is associated with a high implementation cost and can take effect only with a high loss of time. In exposed areas, fireproof dividing walls were also constructed to prevent the spread of fires, with tight-fitting doors and elaborate mechanisms for the technologically induced belting. Especially in strip systems, however, a sufficiently tight connection is difficult to achieve even with very high effort by special tape constructions. Information about the permissible level of leaks has not been disclosed so far.

Object of the invention

The invention has the goal to extinguish fires in elongated tunnel-like spaces, in particular on conveyor systems underground with minimal effort and the highest probability.

Explanation of the essence of the invention

The invention has for its object to bring by interfering with the weather in the area of a fire in tunnel-like spaces such as underground routes, df s fire to extinguish.

According to the invention the object is achieved in that in the event of a fire preferably automatically throttling the weather (air) takes place, which reduces the flow velocity to a maximum of 0.25 m / s. This value must be maintained in a storage space of at least 70m in length. For throttling are preferably self-acting weather barriers whose arrangement is also made multiple times. In particular, in difficult to be sealed belt systems, these are to be carried out with an aperture ratio of less than 0.025. The depression allowed on the weather barrier is 200Pa, which is to be controlled. If this value is exceeded, at least one additional weather lock must be put into effective position.

embodiment

The invention will be explained in more detail below using an exemplary embodiment. In the accompanying drawing, Fig. 1 shows a fire in a sandy underground route and the means for extinction in the zip.

FIG. 1 shows an underground section 1 with a belt installation 2 installed therein. The fire 3, which is caused by the friction of a rubberized carrier roller, spreads out in the direction of the weather. In the further course, the thermally based arbei.ende triggering element 4 is achieved by hot combustion gases. By its response as Läsen the tether, the weather lock 5 is brought directly into operative position. The weather lock 5 closes the cross section of the underground route 1 except for a residual opening of less than 2.5%. Due to the weather lock 5, the amount of weather is throttled and their flow velocity is reduced to a maximum of 0.25 m / s. If this value is not reached, further betting locks 5 are to be brought into operative position. As a result of the reduced supply of oxygen and its consumption by the combustion process and the enrichment of inert gases, the fire 3 is extinguished or greatly reduced in intensity, and its propagation speed approaches zero. To protect the weather lock 5 from the action of fire, the tripping element 4 is arranged at least 70 m away from it, whereby at the same time a corresponding storage space is provided against the fire 3. The necessary density ^{1 of} the weather barrier 5 is determined by an experiment in its active position and measured the resulting depression and the reduced flow rate of the weather.