CN1269457A

CN1269457A - Barrier for preventing plastic bag bursting and mounting method therof

Info

Publication number: CN1269457A
Application number: CN 00104975
Authority: CN
Inventors: K·舒尔特
Original assignee: Lloyd Montana Ltd By Share Ltd
Current assignee: Lloyd Montana Ltd By Share Ltd
Priority date: 1999-04-06
Filing date: 2000-04-06
Publication date: 2000-10-11
Anticipated expiration: 2020-04-06
Also published as: CN1109807C

Abstract

The barrier against underground gas and coal dust explosions comprises a plurality of plastic bags (2, 3, 6) which are suspended from carrier beams (7) or frames, contain substances retarding or extinguishing flames, have a wall thickness of 70-120 mu m, and are provided with integrated streak-like weakened zones (10, 11). The bag material is a polyethylene foil which is compatible with conditions prevalent in mines, and is self-adhering when wound around carrier beams. Also claimed is a method for installing such an explosion barrier.

Description

Explosion-proof barrier of polybag and mounting method thereof

The present invention relates to explosion-proof barrier that a kind of coal gas that particularly prevents underground coal mine and coal dust explosion are used, that form by many polybags, these polybags be fixed on the cramp bar that extends along the tunnel transverse axis or the bearing support with its broadside and a kind of fire retardant is housed or extinguishing chemical with having anlistatig fireproof bulkhead.In addition, the present invention relates to a kind of polybag an explosion-proof barrier of formation is installed to along the method on the cramp bar of tunnel transverse axis setting.

In sub-terrain mines particularly in the underground coal mine, because the coal gas that flows out and because the coal dust of powdery can cause the blast of heavy damage effect.So be defined in certain position in decades and so-called explosion-proof barrier be installed always by certain regulation.Only use the explosion-proof barrier of rock dust at first, the rock dust layer of powdery is on plank, and these planks are bearing on the cramp bar, and cramp bar then is bearing in the tunnel supporting particularly on the tunnel sidewall.The explosion-proof barrier of this rock dust up to today still in part is used.Its shortcoming is that installation and check are all very bothersome, need special-purpose hand tool simultaneously, could become necessary rock dust amount layer above the tunnel bottom barrier of corresponding height.Another shortcoming is that rock dust is exposed in the air, so rock dust can not often guarantee necessary drying property and flying upward property.German patent DE-GM 90 12 081 has proposed a kind of explosion-proof barrier, and this explosion-proof barrier is formed with tank at least since then, and tank is then made with foamed polystyrene or similar material.According to the regulation of mines authorities, single tank must be arranged like this, always can guarantee that promptly the compression wave that explodes destroys explosion-proof barrier.So the bearing support that uses can only be bearing on structure or corresponding support or the cantilever and can quite easily fall down suddenly.This explosion-proof barrier is built by the expert and is safeguarded because only build meticulously and constantly during maintenance this explosion-proof barrier just work.Particularly must check the water yield that whether often has regulation in the tank.Therefore, safeguard and to build required manpower and financial resources quite big.For the evaporation danger that makes in the tank the pre-water generates of annotating is reduced to bottom line, but that DE-GM 90 12 081 proposes to arrange in groove is a kind of by very thin water filling and the closable capsule made from rupturable plastics.This plastic foil must satisfy the regulation of mines authorities, is antistatic and fireproof.But the result shows that employed thin-walled can not have necessary security in time releases the water of injection, because in fact used double wall.

DE OS 31 40 375 has proposed another kind of scheme, tank that need not be up to now, and plastic foil itself is made the water tank type container.Each such container is all made by the material that pliable and tough fluid-tight and appropriate authorities allow, and its shape can satisfy corresponding steric requirements under the ore deposit.Single container can make a bag shape, sausage shaped or blown tubular, and rope or wire are fixed in the supporting.But the result shows that this container is done the time spent at compression wave can not emit extinguishing chemical with the reliability of necessity, i.e. water.

DE-GM 295 08 995 has proposed a kind of explosion-proof barrier, and this explosion-proof barrier is by tying single water bag around single bearing support or cramp bar, water filling then, thus reach the obvious manpower and financial resources that reduced.The deadweight of water bag can make it effectively be fixed on the cramp bar.The water that injects can not flow out, because used Water filling valve can be closed.Like this, after in a single day this explosion-proof barrier builds up, in fact just without any need for maintenance.But this explosion-proof barrier shows, though reached the minimizing of the expection of manpower and financial resources, but still need special the care, could often guarantee its validity, particularly when using the sizable water bag of wall thickness.This water bag can not be in time or can not be emitted the extinguishing chemical of injection at all, and is particularly especially true when producing the little compression wave of intensity.But this compression wave also is dangerous, and produces sizable flame.

The objective of the invention is to, propose a kind of explosion-proof barrier and mounting method thereof, this explosion-proof barrier has reliable and simple structure and under the lower situation of explosion-proof barrier, this explosion-proof barrier also can in time move.

According to the present invention, this purpose is achieved in that the wall of polybag has 70 to 120 microns wall thickness and is provided with and makes the rent for the treatment of be integral that these treat that rent is in strip; This wall is with being applicable to that mining polyethylene sheeting is made and can twining and clamp automatically around cramp bar.Compare with known so-called water bag, adopted a kind of film of suitable mining industry, even this film also can break when the low blast pressure with its little wall thickness, so can emit extinguishing chemical immediately, particularly when using water as extinguishing chemical, at wall thickness best 100 to 110 microns and be provided with under the above-mentioned situation for the treatment of rent, water bag just can break when minimum blast pressure.The water of at this moment emitting knocks out the flame of following in the compression wave back, thereby the main harm of this blast is reduced to bottom line or avoids fully.Used polybag or water bag are provided with makes the rent for the treatment of be integral.That is to say, these treat that rent with the naked eye cannot see, but it is in full force and effect, thereby generally speaking, do not influence the sealing of film, use, that is to say so this polybag can be used as water bag, this polybag filled water, and don't exist the water that injects to treat that from treating the dangerous of rent outflow or these rent causes polybag to leak.When packing polybag into rock dust, 70 to 80 microns wall thickness shows it is suitable.Surprisingly, though the wall of polybag seems thinner with 70 to 80 microns thickness, in depositing process, rock dust still safe storage in polybag.According to the general structure of polybag, polybag can keep the required resting period of rock dust.Producing under the situation of compression wave, the wall of polybag preferably breaks and emits rock dust along the rent of doing to be integral for the treatment of, to knock out the flame of following compression wave.No matter be that the wall with very little wall thickness remains safe when using water as extinguishing chemical or making extinguishing chemical with rock dust, be in strip because treat rent, so the weight of the extinguishing chemical that injects is reliably born by whole wall.

According to a suitable structure of the present invention, in the polybag manufacturing process, come one to produce to treat rent by place additive that a kind of increase tears ability in vertical direction.So can be in raw-material mixing with regard to the given rent for the treatment of.The given this ability of tearing of additive, and on purpose be set in the direction promptly as previously mentioned in vertical direction.Like this, when producing compression wave, water bag or polybag just can safety on demand occur breaking.Wherein, these additives insert when making film like this, treat that promptly rent is bar shaped and concentrates, so as above-mentioned rupture zone accurately be positioned at regulation, on the vital position of process described here.

In the scope of doing to be integral for the treatment of rent, wall has additionally or has only one to reduce, and preferably is reduced to when being lower than 50 microns wall thickness from best 100 microns, can realize another kind of possibility or realize that polybag tears the optimized combination of ability.These treat that rent also can arrange trellised shape, so that guarantee in vertical implosion.That at this moment will note this horizontal expansion certainly treats the unlikely supporting capacity that influences of rent.Basically produce the break line that extends along diagonal thus.In these zones, reducing of wall thickness can be by being controlled by nozzle in the injection moulding process.Accurate width can correspondingly be regulated.So, with the advantage of this solution of additive be, can make bar shaped generation or regulation keep very narrow, thereby littler to the supporting capacity influence at this place.

Help on the cramp bar rolling forward or overturning owing to the top edge of polybag is wrapped in accordance with regulations, the installation that makes polybag is that it is wrapped in and becomes easy on the cramp bar.Accordingly " reel " only open very little so that encase cramp bar, then or packing into or in advance realize being fixed on the cramp bar by the corresponding load of all the other bag sections by means of extinguishing chemical.

Welding and when having the injection valve of a flute profile formula that a best available trap is closed in wall on the one broadside around the polybag is no matter be water or it all is favourable making extinguishing chemical with rock dust.Injecting valve by this can inject extinguishing chemical.For this reason, when using water as extinguishing chemical, only need get final product with a flexible pipe, then need be with a suitable material feeding funnel when the usefulness rock dust.Then, close injecting valve or groove by the flashboard of living, like this, the extinguishing chemical of injection just no longer is subjected to the influence of outside atmosphere.

If only injecting rock dust, polybag makes extinguishing chemical, then the top edge of polybag has that a hole that always reaches side and wall have 70 to 100 microns, best 80 microns wall thickness and the punch format of vertically extending additional when treating rent, and this is advantageous.Sizable hole has such advantage, and promptly rock dust in the injected plastic bag, hangs over polybag on the cramp bar then, and its top edge is guided so in advance, and the back is pressed onto and is fixed on the cramp bar by the remainder of polybag on the cramp bar being wound into to make it.Because the very little wall thickness of wall and because the additional weakening that vertically extending perforation causes, so though injected the rock dust amount, still have such safety, promptly polybag can not discharge and break without pressure automatically.On the contrary, only when the relevant pressure ripple occurs polybag just can break and discharge.Wherein, also can there be purpose to adjust polybag like this, it just can be broken when the possible blast pressure ripple of minimum with perforation and the common rent for the treatment of.Although perforation is arranged, rock dust itself still leaves the inner space of polybag reliably in, because perforation can not discharge rock dust, even perhaps discharge, is a little granule also, and the outflow of rock dust can not occur.

When the charge of polybag is designed to 40 to 80 kilograms and when representing its charging degree with at least one line of demarcation, no matter then be that water or rock dust extinguishing chemical all are favourable.In two kinds of situations, polybag all must be feeded under the ore deposit, installs then, and is perhaps opposite, installs afterwards earlier and feeds.Like this, the miner just can know and know that he must adorn the charge how many amounts could guarantee regulation from the line of demarcation.

When polybag has a shape that be fit to make the auxiliary haversack that usefulness is installed, polybag advantageous particularly then to packing in advance with rock dust.Polybag is put into haversack and for example is transported to corresponding height with ladder, and then, the top edge of polybag is wrapped on the cramp bar, unclamps and can fix.

Particularly when the muck powder, at flat rod of top edge configuration of polybag, one or both sides that this flat rod is reinforced this top edge and protruded from the polybag side, it is very helpful that this top edge to polybag penetrates cramp bar.The top edge of polybag can be penetrated with comparalive ease like this with the flat rod of this root, promptly when polybag unclamped, this flat rod was positioned at the following of film or wall and is pressed onto on the cramp bar by the latter, thereby can realize necessary fixing.

Under the disadvantageous situation of locality condition, preferably polybag is wrapped on the auxiliary rod with its top edge, this auxiliary rod design have be fixed on the cramp bar or hang thereon supporting hook, these hooks preferably are furnished with a corresponding suppending hole.In this case, polybag can be loaded onto rock dust or water at the tunnel bottom, is wrapped in this auxiliary rod then and goes up and corresponding lifting, and like this, polybag just is fixed on the auxiliary rod.To assist rod to hang on the supporting hook then and also can improve whole explosion-proof barrier like this.

For the required extinguishing chemical of deposit on the cross section of minimum, the present invention's suggestion, polybag makes two bags, promptly preferably is made up of two polybags that are wrapped in simultaneously on a cramp bar or two cramp bars of drawing close side by side.The valve of wherein feeding is arranged on broadside freely.Two bags or two bags can hang over like this and be fixed on the little cross section, so that the extinguishing chemical of the water and so on of packing into.Like this, particularly disposed above-mentionedly when treating rent when the polybag of two front and rear suspensions, under the situation that produces compression wave, just can not influence the effect of polybag.

Up to the present described polybag is moved easily, because it has only 40 to 80 kilograms weight.In order to fill the cross section, tunnel, must on a cramp bar, fix a plurality of such polybags, this situation the present invention's suggestion is hung suspension ring in the top edge configuration of polybag, the cross section of suspension ring is greater than the cross section of cramp bar.The polybag of corresponding lengthening need dispose a plurality of such suspension ring and with proper implements or vehicle polybag is risen to the tunnel upper position after cramp bar pushes in the suspension ring.When using water as extinguishing chemical, this work can be finished by hand, is out of question because carry out water filling after being suspended to top, tunnel.In this case, can imagine the polybag that quite to grow and be divided into a plurality of locellus, when producing compression wave, just can guarantee that water evenly flows to cross section, whole tunnel like this.At polybag is under the situation of a logical chamber, and always troubling polybag only breaks in a side, and extinguishing chemical can only flow to certain scope like this.

When using rock dust, an also available quite long single explosion-proof barrier, at this moment with a polybag or plastic foil with its both sides be centered around two adjacent, preferably free support fixedly is wound in a secondary stretcher shape on the cramp bar on the carriage, one side of two side disposes the cover film of a whole stretcher of turning covering.Stretcher at first is installed in top, tunnel scope and plays a part the platform of the explosion-proof barrier of rock dust up to now.That is to say that the rock dust layer covers with cover film then on the stretcher surface, protected that the rock dust of Dui Fanging just is not subjected to the influence of atmosphere that is tunnel moisture so betwixt.If at this moment produce compression wave, then whole stretcher falls down from cantilever, and cramp bar discharges plastic sheeting, and this plastic sheeting preferably also is furnished with the above-mentioned rent for the treatment of.Since cover film just lid in the above, so rock dust under any circumstance all can emit immediately, thereby the flame of arrival reliably extinguishing after.Its advantage is, deposited quite a large amount of rock dust with the space of minimum, and the rock dust of depositing does the time spent at compression wave and all emit, because whole stretcher is toppled over downwards, opened and decomposes.

According to an improvement project of the present invention, one of cramp bar extends near the top, tunnel than another root cramp bar, thereby improves the acting surface of compression wave, and this helps the startup of explosion-proof barrier.This stretcher tilts so to a certain extent and is positioned at the cross section, tunnel, so that compression wave only need make this stretcher topple over, and just can cause the above-mentioned release of rock dust.In this case, general needs very little difference in height to get final product, and must consider simultaneously because the obliquity of stretcher can only be deposited less rock dust certainly.

As previously mentioned, by coverlay the rock dust of depositing is kept dry and keep not affected by environment.A side Extension support bar is hanging and is preferably disposing a vertical pole because this coverlay is connected also over there in a side of face tripping power with plastic film strip, so, open this stretcher with the reliability of maximum and promptly throw off this coverlay.The edge of this vertical pole and coverlay is upwards started and jettisoning by compression wave, so also before stretcher is toppled over or ruptured, the big portion area of stretcher has not had film.This is obviously favourable to emitting of rock dust.

The wall that has about 80 micron thickness at polybag is provided with a plurality of when being parallel to the next door that perforation extends, and surprisingly, under the compression wave effect, this wall breaks very soon and rock dust is emitted very soon.The individual plastic bag is divided into a plurality of splittings by corresponding, and in this case, these next doors do not cause more firm, but single splitting is broken more quickly than corresponding bigger total bag.This obviously be since the very thin rock dust of particle " do not flow away " but distribute come due to.

According to the present invention, a kind of simple and suitable embodiment that polybag is divided into single splitting is that the next door forms with weld seam.These weld seams are made when making polybag simultaneously together, that is carry out two sides and following welding simultaneously.Polybag separately is with this form supply, muck powder and carry out corresponding installation.

According to the present invention, for the charge that realizes that splitting is bigger, the next door constitutes with the wrinkle bar and these wrinkle bars is connected with wall with weld seam.Like this, particularly under the situation of the sidewall appropriate structuring of a polybag, just can obtain sizable charge, and not need to change the size of individual plastic bag.

The of the present invention another kind of structure similar with the next door to weld seam be, polybag disposes one or more isolating metal silk, these isolating metal silks have extend along wall and can be around the end that cramp bar connects.It is such to be similar to the next door, can be divided into single splitting to polybag by these isolating metal silks.Certainly, practice shows that the isolating metal silk can not reach the effect of dividing wall fully, and gives to install and also cause difficulty.But when suitably installing, these isolating metal silks can be delivered to the weight of the individual plastic bag that rock dust is housed on the corresponding cramp bar together, because single isolating metal silk is wrapped on the cramp bar.This structure is preferably only packed into rock dust in the individual plastic bag by a charging hole, rather than by a plurality of charging holes single splitting of packing into.Also can imagine and the isolating metal silk is made polygonal, like this, when compression wave affacts on the polybag of suspension, also help breaking of polybag wall simultaneously.

As previously mentioned, single water bag is that polybag preferably is connected with cramp bar or with a bearing support like this, and promptly these individual plastic bags just partly are wrapped on this cramp bar or this bearing support.Like this, just can make wall thickness be 80 to 120 microns and at least the polybag of dual-side and base sealing with the weight of its top edge by the extinguishing chemical of packing into itself with regard to can fixedly be wrapped on this cramp bar and before or after by suitable and the closable hole extinguishing chemical of packing into, wherein, the wall of polybag just is provided with to increase when it is made wittingly tears the rent for the treatment of of ability, and don't influences its sealing.So the individual plastic bag is made by a kind of film, in this film, promptly produce by additive intentionally and treat rent by the additive of having a mind to add, these treat that rent is when polybag hangs or bear the bearing capacity of necessity that polybag is applied after hanging, but when compression wave impacts, these treat that rent breaks, thereby emit rock dust with the reliability of necessity.Be stressed that especially, treat that rent is to have a mind to and reliable the setting fully, so the polybag made from film self can be by suitably being fastened subsequently on being hanging to cramp bar the time, but when polybag pressurized Reeb acted on, polybag was in vertical implosion.This both had been applicable to that water made extinguishing chemical and be applicable to that also rock dust makes extinguishing chemical.When using rock dust, the extinguishing chemical of just packing into after being preferably in polybag and hanging up.

For fear of the rock dust of packing into that bothers very much by valve hole or filler valve, the best 80 microns polybag of wall thickness is being reserved the rock dust of packing under the situation of certain coiling length before being preferably in and hanging, promote then, be wound on the cramp bar from the top, promote top edge again from the below downwards and also may shift the below of the wall of approximate vertical suspension again onto, and the polybag deadweight by the extinguishing chemical of packing into is fixed on the cramp bar under the sagging situation of maintenance.Though be fixed on the aid that generally needs haversack and so on the cramp bar hardly, this also depends on size or its charge of polybag after all.When charge is 40 kilograms, whole polybag can be raised to corresponding height with hand, realize on the cramp bar fixing by being wrapped in then.

A kind of uncovered like polybag and a kind of explosion-proof barrier of the corresponding rock dust amount of the explosion-proof barrier of rock dust up to now of holding be to constitute like this: plastic foil is around the shape of two adjacent cramp bar coiled one secondary stretchers and play polybag effect self and fixedly be wrapped on the cramp bar, the rock dust of packing into then is that rock dust piles and unclasps with one, be fixed on a coverlay on the long limit at least and cover.The polybag of Gou Chenging also has the advantage that can partly trace back to effective in decades explosion-proof barrier building technology at least in this way, but method described here can leave quite a large amount of rock dust in the cross section, tunnel in simple mode, and make its weatherproof in the tunnel, particularly be not subjected to the influence of the humidity that exists in the tunnel.

The polybag of having feeded on ground can be transported safely fully like this, and promptly the sealing sheath that polybag is put into the most handy polypropylene of plastics or polyethylene belt fabric rolling transports.This sheath is untied after the thin-walled plastic bag is fixed on the cramp bar, preferably cuts off.This polypropylene or polyethylene belt fabric have higher breaking strength and advantages of high bearing capacity, so it is not impossible transporting this polybag that 30 to 40 kilograms of charges are housed with it.In other words, but this polybag safe transport then, rolls over firm sheath material fall to the place to use.Like this, when producing compression wave, the wall of polybag just can reliably break, thereby emits extinguishing chemical.So just saved the charging process under the ore deposit, and polypropylene or polyethylene belt fabric be airtight fully, thus can not occur that temperature or humidity problem cause to the rock dust adverse influence of packing into.

According to a kind of mount scheme, the polybag that rock dust particularly is housed can be installed with comparalive ease, and its process is: the polybag that part is equipped with rock dust singlely is wrapped on the fixed bar, this fixed bar is risen to cramp bar and it is suspended on the corresponding hook of configuration with its top edge.In this case, though increased certain flexibility of the suspension of the polybag that rock dust is housed, the result shows that polybag still reliably breaks along with the compression wave that produces.Break in fact before introducing swing process or just begin during swing process, therefore, when the plastics dress was in actual oscillating motion, rock dust was emitted.

Particularly, the present invention proposes a kind of being easy to and installs and maintenance-free explosion-proof barrier, preferably adopts such polybag, even it just can move when little blast pressure, promptly its wall breaks and emits the extinguishing chemical of packing into.Particularly using water as extinguishing chemical carries out very smooth.Wherein, treating rent, additional suitable perforation being set, even breaking of when making extinguishing chemical, also can realizing ideal with rock dust by have a mind to constituting.Treat that rent embeds additive and forms when making film, or by having a mind to attenuate film or bar shaped, or as mentioned above, when making extinguishing chemical, all can form and treat rent by corresponding perforation is set with rock dust.Wherein surprisingly, when in fact corresponding perforation formed on whole or on the broadside, rock dust did not flow out yet.Another characteristics of the present invention are, cost manpower seldom when corresponding explosion-proof barrier is installed not only, and after installation, in fact do not need any maintenance.Wherein, used polybag both can be that size is less, also can be that size is big to the polybag that almost can fill whole tunnel width, decided on used the sort of extinguishing chemical or required precondition.At last, by polybag is had a mind to be fixed on the cramp bar, realized just depositing required extinguishing chemical, thereby can reach very compact explosion-proof barrier with very little space.

Describe other details of the present invention and advantage in detail below in conjunction with accompanying drawing, a preferred embodiment shown in the drawings and necessary part drawing and component thereof.Accompanying drawing is represented:

Fig. 1 has adorned one section tunnel of explosion-proof barrier;

Fig. 2 is equipped with a section that hangs polybag of rock dust;

Polybag of Fig. 3 by means of an auxiliary rod installation;

The section of Fig. 3 a water bag shown in Figure 3;

The section that Fig. 4 polybag shown in Figure 3 hangs with the hook of opening;

The hook of closing that Fig. 5 is similar to Fig. 4;

Fig. 6 has one section tunnel of different big small plastic bags;

The bearing support of Fig. 7 polybag;

Fig. 8 is equipped with the section of the suspension polybag of water;

Fig. 9 is with the polybag of flat rod;

The section of Figure 10 filler valve;

The part drawing of Figure 11 filler valve shown in Figure 10;

The lateral view of the two bags of Figure 12;

Two lateral views that nestle up the polybag of suspension of Figure 13;

Figure 14 section of the polybag of suspension ring;

The lateral view of Figure 15 polybag shown in Figure 14;

The section of the explosion-proof barrier of rock dust of Figure 16 first secondary stretcher;

Figure 17 has the explosion-proof barrier of the similar rock dust of Figure 16 of coverlay;

The lateral view of the explosion-proof barrier of rock dust shown in Figure 18 Figure 16 or 17;

The vertical view of the explosion-proof barrier of Figure 19 rock dust shown in Figure 180;

The explosion-proof barrier of tilted-putted rock dust of Figure 20 band coverlay;

Fig. 1 represents an explosion-proof barrier 1, and this explosion-proof barrier finally has been installed in one section tunnel.This is a width of cloth phantom drawing.Cramp bar 7 is fixed on the tunnel arch support 30 of 24 belows, top, tunnel and 23 tops, bottom, tunnel, perhaps or rather, is fixed on the tunnel sidewall 25, begins to install

polybag

2,3 from tunnel base plate 23.This

polybag

2,3 can be the polybag of dress extinguishing chemical 19 or extinguishing chemical 20, and promptly they can adorn water or rock dust.

Install at top, polybag 2,3 as close as possible tunnel 24, and assisted plastic bag 6 then is configured on the bar 27 at tunnel sidewall 25 and this place.In addition, can find out that cramp bar 7 is bearing on the cantilever 26, this cantilever or be connected with the tunnel arch support perhaps is fixed in the scope of tunnel sidewall 25.

Fig. 2 represents that individual

plastic bag

2,3 and 6 has identical wall 8, wherein, given thin zone, this also will illustrate below.The identical wall 8 of

broadside

4 and 5 usefulness, and the rent 10,11 for the treatment of that schematically illustrates in Fig. 1 and Fig. 2 vertically extends, so do not influence the supporting capacity of

polybag

2,3 and 6.

Individual

plastic bag

2,3 and 6 is wrapped on the cramp bar 7, and promptly wall 8 clamps top edge as can be seen from Figure 2, so polybag 2,3,6 is fixing quite reliably.

The film 12 here adopts polyethylene sheeting, and this film is added with additive, treats rent 10,11 so that form.Can add be provided with reduced wall thickness the zone as previously described.In addition, as shown in Figure 2, when polybag shown in Figure 2 is made extinguishing chemical 20 with rock dust, the perforation 22 that schematically illustrates can be set also.

For polybag 2,3,6 reaches a favourable filling level, be provided with

fold

28,36 at dual-

side

15,16 and base 17.That is polybag 2,3,6 is along with

extinguishing chemical

19 or 20 and strut of packing into.Can know from Fig. 2 and to find out, with the enough filling levels of a line of demarcation 29 regulations.Also showing a filler valve 18 among the figure, is extinguishing chemical 20 by its rock dust of can packing into.Need a funnel for this reason.Certainly, can imagine also on top that edge 14 is provided with a sizable hole 13, so that can be by this hole rock dust of packing into quickly.

Marked runway 31 in the scope of the tunnel of Fig. 1 and Fig. 6 base plate 23, tunnel 9 drivings shown in the figure are out of question.

Fig. 3 represents a kind of special construction, and polybag 2 has disposed an auxiliary rod 32, that is by auxiliary rod 32 polybag is closed, so that promote whole polybag 2 and it is suspended on the hook 33,34, these two hooks are arranged on the cramp bar 7.As shown in Figure 4 and Figure 5, hook 33,34 can have different shapes, that is its hang aperture 35 can freely hang into, as shown in Figure 4, or be designed to like this, promptly auxiliary rod 32 is in case after extension, just no longer may take off from linking up with 33,34 easily.

Fig. 6 represents the open close of the one section tunnel 9 similar to Fig. 1, also shows track on runway 31 next doors here.In addition, show the different polybag of

size

2,3, its charge is 40 to 80 kilograms.As shown in Figure 6, because the size difference of

polybag

2,3, so, can install them very close to top, tunnel 24.Two polybags 2 shown in the left side have the different rents 10,11 for the treatment of.Wherein, may there be some problems in the structure of that band raster of the right, because owing to horizontally extendingly treat rent 11 and can influence the supporting capacity of polybag 2.Be rock dust to extinguishing chemical 20 particularly, the rent 10,11 for the treatment of of punch format 22 no longer includes influence, and particularly rock dust can not flow out by these perforation 22.

Fig. 7 represents the explosion-proof barrier 1 of bearing support 37 forms, and this bearing support has disposed six

polybags

2,3 altogether.What these polybags had a bar shaped treats 10,11 and filler valve 18 of rent.

Fig. 8 represents that suitable with Fig. 2 one is equipped with the water bag that water is made extinguishing chemical 19.Here top edge 14 also is to be wound on the cramp bar 7, and polybag 2 itself is fixed on the cramp bar 7.

Fig. 9 represents especially this polybag 2,6 to be wrapped on the cramp bar 7 and can to simplify like this, promptly 13 top edge 14 is furnished with one flat excellent 38 in the aperture, these flat excellent two ends have the section of stretching out 39, like this, it is approaching to help the people, so that top edge 14 is guided like this, make it move on to the below of all the other films 12, realize fixing then.

Figure 10 and 11 expression part drawings, the particularly special construction of filler valve 18.Wherein, hole 42 is closed by a movable flashboard 41, and this flashboard has a handle 45 in the lower end, so that take off or rotate around fulcrum 44.Be provided with a sucker 43 by Figure 11, can be fixed on the lower limb of with handles 45 flashboard alive 41 on the wall 8 with this sucker.

Figure 12 and a large amount of extinguishing

chemical

19 or 20 of 13 expressions can be stored in very narrow space, wherein, two polybags 2,2 ' or a shared cramp bar 7 perhaps dispose two cramp bars 7,7 ' that lean on very closely, and filler valve 18 preferably is separately positioned on broadside 4,4 '.

The quite long polybag 48 of Figure 14 and a kind of special construction of 15 expressions, this polybag is shifted onto on the cramp bar 7,7 ' with suspension ring 46,47.These two cramp bars 7,7 ' are placed on and are bearing on the carriage 26,26 ', so that pack water or rock dust into, promptly extinguishing chemical 19,20.Quite Chang polybag 48 required supportings are undertaken by the supporting

chord member

49,50 that evenly is arranged on by certain distance on the whole length, and the effect of these chord members is that corresponding load also is delivered on the cramp bar 7,7 ' from polybag 48 reliably.Certainly, also can imagine structural shape shown in Figure 14 is the structural shape of a

short polybag

2,3,6, at this moment, when a

polybag

2,3 destroys or damages, certainly will give and change or install and cause difficulty, because must at first take off cramp bar 7,7 ', the polybag that damages could be replaced with a new polybag from cantilever 26,26 '.

In Figure 15, the position of filler valve 18 is not shown.Figure 14 then shows in the both sides of polybag 2 scope and cover plate scope and is fit to arrange filler valve 18.Through the cover plate scope rock dust of for example also can packing into afterwards, even distribution in

polybag

2,3 or 48 is very favourable to rock dust for this.

A kind of improvement project of the explosion-proof barrier of Figure 16 to 20 expression rock dust, here its dual-

side

53,54 of plastic foil 52 usefulness is wrapped on the corresponding cramp bar 7 and forms the shape of a secondary stretcher 55, so just constitute a good bearing surface 51, be poured on this bearing surface with regard to layering but extinguishing chemical 20 is a rock dust.Because film is that plastic film strip 52 is bent downwardly itself, so form above-mentioned stretcher 55, such stretcher can be deposited the rock dust of q.s.As shown in figure 17, the rock dust of depositing like this covers with a cover film 56 then.So this extinguishing chemical 20 can not be subjected to the influence of environment.

Figure 18 represents the lateral view of stretcher 55 shown in Figure 17, and Figure 19 represents its vertical view.As can be seen from Figure, in fact the whole width in tunnel 9 can be deposited required rock dust amount completely with a secondary stretcher 55, and single cramp bar 7 is bearing on the cantilever 26,26 ', and when producing compression wave, whole stretcher 55 falls down from

cantilever

26,26 '.At this moment because cover film 56 flies, be distributed in the tunnel so whole rock dust is an extinguishing chemical 20, thereby effectively stamp out the flames.Produce excessive amount of deflection for fear of plastic film strip 52, also can imagine between two cramp bars 7,7 ' suitable plank is set, but normally unnecessary, because being corresponding polybag material, used plastic sheeting can bear necessary power, so that can support this stretcher 55 reliably and with long-term.

Figure 20 represents a kind of special construction, and whole here stretcher 55 tilts to be placed in the direction that arrives compression wave 61.Can realize face to tilt to place by putting to such an extent that be lower than opposite one side 58 from the cramp bar 7 on 57 on the pressure side.Like this, compression wave 61 can act on the below of stretcher 55 more reliably, and this stretcher disequilibrium also falls down from cantilever 26.

Figure 20 also shows cover film 56 fixed point 60, and cover film is fixed on plastic film strip 52 or the polybag 2 at this fixed point, and an end 62 on its opposite then is to extend through cramp bar 7 ' simply.Coverlay 56 has a vertical pole 59 in its end, this vertical pole is established for the sealing of the necessity in the cramp bar 7 ' scope on the one hand, and extinguishing chemical 20 is discharged.

Individual

plastic bag

2,3,6 in Fig. 3 also can be divided into some splittings, promptly 14 continuous next door 65 is set from lower limb 17 to top edge.Made by weld seam 66 at making individual plastic bag in 2,3,6 o'clock in these next doors 65.In the splitting 71,72,73 that is divided into by next door 65, be respectively charged into rock dust, the water of in individual cases, also packing into.Complete can breaking rapidly or more promptly these splittings 71,72,73 resemble shown in Figure 3 whole bag.Particularly, also line of demarcation 29 further can be moved up during with this structure, because the rock dust of packing into is evenly distributed in each splitting 71,27,73 very much.

Fig. 3 a represents the folding bar of the also available tape welding seam 66 of simple weld seam 66 as next door 65, thereby can strengthen the charge of each splitting 71,72,73.

Without next door 65, an isolating metal silk 68 also can be set, its end 69,70 can be wrapped on cramp bar 7 or the auxiliary rod 32.So just can separate

polybag

2,3,6.

Self-evident, when the individual plastic bag directly or indirectly was configured on the cramp bar 7, it also was possible next door 65 being set and making splitting 71,72,73.

Above-mentioned whole feature comprises the feature that obtains separately from figure, no matter be independent or combination, all think essence of the present invention.

Claims

1. prevent in underground coal mine particularly that the explosion-proof barrier that underground gas and coal dust explosion are used has many polybags (2,3,6), these polybags are with its broadside (4,5) be fixed on the cramp bar (7) that extends along the tunnel X direction or bearing support (37) and go up and be equipped with a kind of fire retardant or extinguishing chemical with having anlistatig fireproof wall (8), it is characterized by: polybag (2,3,6) wall (8) have 70 to 120 microns wall thickness and be provided with do to be integral treat rent (10,11), these rents are in strip; Wall (8) can be wrapped in cramp bar (7) and upward and automatically clamp and make with suitable mining polyethylene sheeting (12).

2. by the explosion-proof barrier of claim 1, it is characterized by, the rent of doing to be integral (10,11) for the treatment of produces by the additive that can improve tearing strength is set in vertical direction in the process of polybag (2,3).

3. by each explosion-proof barrier of aforementioned claim, it is characterized by: in the scope of the rent of doing to be integral (10,11), wall (8) have additional or only have one that reduce, preferably be reduced to from 110 microns and be lower than 50 microns wall thickness.

4. by each explosion-proof barrier of aforementioned claim, it is characterized by, the top edge (14) of polybag (2,3) is wrapped in cramp bar (7) in accordance with regulations and goes up and help rolling forward or overturning.

5. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3) welds all around and have a filler valve (18) on a broadside (4), and this valve preferably is arranged in the wall (8) with 30 (42) the form that an available portable plate (41) is closed.

6. by each explosion-proof barrier of aforementioned claim, it is characterized by: the top edge (14) of polybag (2,3) has an aperture (13) that always extends to two sides (15,16); Wall (8) has 70 to 100 microns best 80 microns wall thickness and has the additional rent (10,11) for the treatment of of vertically extending perforation (22) form.

7. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3) is designed to have 40 to 80 kilograms charge and has the line of demarcation (29) of at least one expression filling level.

8. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3) has one and is fit to do the auxiliary shape that the haversack of usefulness is installed.

9. by each explosion-proof barrier of aforementioned claim, it is characterized by, the top edge of polybag (2,3) has disposed a flat rod (38), and top edge (14) reinforced by this flat rod and side (15,16) is stretched out in one or both ends.

10. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3) is wrapped on the auxiliary rod (32) with top edge (14), should assist rod to be fixed on a cramp bar (7) and go up or hang thereon with corresponding hook (33,34), this hook preferably disposes a suitable extension man-hole opening (35).

11. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3) makes two bags, preferably be wrapped on the cramp bar (7) simultaneously or be wrapped in two polybags (2 ') on the cramp bar (7,7 ') that leans on very closely by two and form, wherein filler valve (18) is configured on the free broadside (4).

12. by each explosion-proof barrier of aforementioned claim, it is characterized by, the top edge (14) of polybag (2,3) disposes suspension ring (46,47), its Cross-section Design becomes the cross section greater than cramp bar (7).

13. by each explosion-proof barrier of aforementioned claim, it is characterized by, a polybag (2) or a plastic tape (52) with two side (53,54) fixedly be wrapped in two adjacent, preferably free support on cantilever (26) cramp bar (7) and form the shape of a secondary stretcher (55), and a side (53) of two sides has disposed a turning coverlay (56) that covers on the stretcher (55).

14. the explosion-proof barrier by claim 13 is characterized by, a cramp bar (7) is arranged than another top, more close tunnel of root cramp bar (7) (24), thus the acting surface of raising compression wave.

15. by the explosion-proof barrier of claim 13, it is characterized by, coverlay (56) face from the pressure side (57) go up and be connected also over there a side (58) with plastic tape (52) and exceed cramp bar (7) and hanging, be preferably in its end and dispose a vertical pole (59).

16. by each explosion-proof barrier of claim 6 particularly of aforementioned claim, it is characterized by, polybag (2,3,6) has the wall (8) of about 80 microns wall thickness, this wall has many next doors (65) that are parallel to perforation (22) extension.

17. by each explosion-proof barrier of aforementioned claim, it is characterized by, next door (65) are formed by weld seam (66).

18. by each explosion-proof barrier of aforementioned claim, it is characterized by, next door (65) are formed by wrinkle bar (67), these wrinkle bars usefulness weld seams (66) are connected with wall (8).

19. by each explosion-proof barrier of aforementioned claim, it is characterized by, polybag (2,3,6) disposes one or more isolating metal silk (68), these isolating metal silks have extend along wall (8) and around end (69,70) that cramp bar (7) connects.

Be installed to method on the cramp bar that is provided with in the tunnel transverse axis 20. form the polybag of an explosion-proof barrier, it is characterized by, have wall thickness and be 80 to 120 microns and particularly fixedly be wrapped on the cramp bar also before this with its top edge oneself or the extinguishing chemical of packing into through suitable and a closable hole afterwards at the polybag of side and base sealing at least by the extinguishing chemical weight of packing into, wherein, the wall of polybag is had a mind to be provided with raising and is torn the rent for the treatment of of ability in its manufacture process, and does not influence sealing.

21. method by claim 20, it is characterized by, wall thickness is preferably 80 microns polybag and was reserving the rock dust of packing under the situation of certain coiling length before hanging, then it is risen to and can be wrapped on the cramp bar from the top and promote top edge downwards from the below and may shift the below of the wall that approximate vertical hangs again onto and keeping under the sagging situation, the deadweight of the polybag by extinguishing chemical is housed is fixed on the cramp bar.

22. method by claim 20, it is characterized by, article one, plastic foil forms the shape of a secondary stretcher and fixedly is wrapped on the cramp bar as polybag itself around two adjacent cramp bars, the rock dust of packing into then, after rock dust is piled well, cover with a coverlay on the longitudinal edge that is fixed at least that unclasps.

23. by the method for claim 20, it is characterized by, polybag preferably is contained in the sealing sheath with polypropylene or polyethylene belt fabric rolling and transports, and after the original polybag of thin-walled is fixed on the cramp bar this sheath is untied, and preferably cuts.

24. by the method for claim 20, it is characterized by, the polybag that part is equipped with rock dust individually is wrapped on the fixed bar with its top edge, this fixed bar is risen to cramp bar again and it is suspended in the corresponding hook that is provided with on the cramp bar.