DE2654274B2 - Detonating cords with a shaped charge effect, their manufacture and use - Google Patents

Description

The invention relates to detonating cords with a shaped charge effect, processes for their production and their Use for blasting and perforating.

There are already numerous devices for blasting known in which the effect of a Shaped charge is used. To achieve this effect, it is generally considered necessary to that the V-shaped recess of the charge is free of any liquid or solid material. In particular, in order to be able to use detonating cords effectively even in immersed environments therefore indicated to provide a wall on the open side of the recess to allow the recess from To isolate the outside environment. The closed recess thus obtained can advantageously with a pressurized gaseous fluid can be filled, improving the strength of the '' Achieving deepening compared to compression by water pressure allows this from certain depths is no longer negligible

Such devices are in particular in US-PS 25 34 057 and FR-PS 9 21208 and 67 874 described. These devices are of little technical interest, however, than they are difficult to manufacture and can only be used in a very limited area. In the majority

the cases in which a cutting off, blasting off or Perforating walls in a submerged environment is required, the diver must detonate the detonating cord Bend it round so as to adapt it to the radius of curvature of the wall to be separated in order to achieve a uniform To achieve separation. The above detonating cords are very difficult or difficult to bend even impossible, which is why in some cases their shape has to be adapted beforehand, what theirs Application possibilities very limited

In FR-PS 21 59 717 and in FR additional patent 22 73 255 de / applicant are already satisfactory Solutions to this problem are given which relate to dense cavity detonating cords, the are easy to manufacture and have a structure that favors manual adjustment of the shape

It has also already been specified, the recesses of detonating cords with a rubber foam, with Cork flour, ebonite or porous ceramic to be filled, for example in FR-PS 9 24 798 and 10 87 451. In In the first two cases a considerable attenuation of the beam is observed, and in the Insufficient tightness observed under water, with a film of water between the Detonating cord and the surface to be separated occurs, the adverse effects of which occur when Increase if you exceed a depth of a few meters. In the case of using porous ceramic or With porous ebonite detonating cords are obtained which are practically completely solid and not flexible.

The invention is based on the finding that by introducing hollow microcells, which may be embedded in an organic or inorganic soft or solid binder, into the open depression or the closed cavity v, detonating cords can be produced to be blown off or perforated, possibly up to at great depths, can be used immersed and at which there is no longer a need to introduce a gaseous fluid under pressure into a closed cavity. According to a further development of the invention, this can also be applied to flexible detonating cords for blasting off or perforating, without their flexibility being significantly changed. According to another further development of the invention, which is possibly compatible with the one mentioned above, it is also possible to improve the cutting quality. In addition, the invention in the aforementioned embodiments can also be used to pack detonating cords that are intended for terrestrial applications.

According to the invention, the recess or the cavity of a detonating cord is partially blown off or completely filled with hollow microcells, the are optionally embedded in an organic or inorganic soft or solid binder; such materials are also referred to as so-called "syntactic foams".

The invention is explained in more detail below with reference to the drawing.

F i g. 1 to 7 different types of the invention Detonating cords that can be used in a submerged environment, the detonating cords depending on the Properties of the introduced microcell filling 5 are flexible or rigid,

F i g. 8 to 11 different types of flexible or non-flexible detonating cords that are intended for terrestrial use and where the Cavity partially with a micro-cell filling with hollow micro-cells made of a glass or another Silicate is filled,

F i g. 12 an underwater detonating cord with two types of microcell filling are used

F i g. 13 a detonating cord, the cavity of which is completely filled with hollow glass microcells that are not are cemented with a binder and glued in the cavity with a on the flanks of the detonating cord Cover to be held,

F i g. 14a, 14b and 14c show the course of the groove in a thick steel plate in cross section, longitudinal section or top view when using a detonating cord as

Fig. 15a, 15b and 15c show the course of the groove Use of the same detonating cord, the cavity of which, however, is at least partially filled with micro-cells The hollow micro-cells are lined with glass or other silicates

In all of the above figures, 8 denotes the explosive

The method according to the invention is characterized in that the cavity 1 is a detonating cord is partially or completely filled with a microcell filling 5 for blasting off or perforating 2, which consists of hollow microcells, optionally in a synthetic or natural resin or an inorganic or mineral cement existing binder are embedded.

According to a first and preferred embodiment of the invention, the microcell filling fills the entire cavity of the detonating cord for blasting off or perforating (hereinafter referred to as "detonating cord" for short) labeled). Under the filling of the entire cavity is here and in the following understood that the filling takes up the entire space that is passed through the inner lining of the detonating cord and the plane running over the flanks of the detonating cord is defined.

Such detonating cords are shown in FIGS. 1 to 3 and 12, however, it is known that Certain detonating cords are designed so that they can be used to better exploit their detonation force in one a certain distance from the surface to be cut.

The invention allows this requirement to be met very easily fulfill. For this it is sufficient to add an additional amount of microcell filling above that defined above Add level so as to detonate the detonating cord with the help of the filling in direct contact with the wall to bring into the intended distance from the wall. Such detonating cords are characterized by that the microcell filling is provided outside the cavity in such a way that the detonating cord be attached to the wall to be cut at a distance that is optimal in terms of their function can; an example of this is shown in FIG. 4 shown

The detonating cords constructed according to the first embodiment of the invention are particularly suitable for applications in a submerged environment. The invention lies in the surprising and in Contrary to the technical expectation, the underlying finding is that the presence of a stranger Solid does not necessarily prevent the jet formation or shooting effect, as well as that the penetration capacity of the beam when using certain

Microcell fillings are not altered in an unacceptable manner.

One of the main advantages of the invention is that it is suitable for any particular use in immersed Milieu provides a specially adapted solution. For example, among the known syntactic foams with hollow microcells for example those that have very high flexibility or, on the contrary, have excellent rigidity. The former come in flexible detonating cords used, which are needed for divers to cut to size. The latter are in Submerged cutting devices applied to objects of previously well known shape can be used, for example, for submerged pipes or the walls of those in distress Ships.

In both cases, hollow microcells can be made from phenolic resins, silicates such as glass, or other materials such as carbon or certain coke oven residues. In the first case will be Used binders that are elastic or with plasticizers such as inorganic resins, polyurethane resins or about epoxy resins can be made elastic. In the second case there is also a large one Number of inorganic binders (e.g. gypsum) or organic binders (especially strong crosslinked resins) are available that have great rigidity.

If a longer immersion in water is planned, a hydrolysis-resistant binder must be used that also absorbs as little water as possible when used at great depths Furthermore, very pressure-resistant binders are used, which compress the hollow microcells avoid allow.

According to the invention, it is essential in all cases that the hollow microspheres not be completely compressed still completely from the binder or any other liquid or solid substance, especially water. The binder can also have a content as a limit value contain 5% foreign substances (fillers).

In a further development, known underwater detonating cords with a closed cavity can also be used are used, the microcell filling in a conventional manner, for example by injection is introduced into the cavity in the uncrosslinked state. In those cases where in great depths is being worked or the water pressure could compress the closed cavity, is so through the microcell filling dispenses with the introduction of a compressed gaseous fluid into the cavity, which always raises leakage problems and also for reasons of safety and practicality Feasibility cannot be done on the surface in all cases.

Such detonating cords are shown in FIGS. 5, 6 and 7 However, it is also entirely possible to use detonating cords or charges with an open cavity to withstand the effects of water pressure at great depths as well as conventional ones Detonating cords with a closed cavity. It is sufficient for this to have a very low microcell filling To use water absorption that can withstand a pressure of several hbar Such detonating cords with open cavity have the advantage of a possibly higher flexibility than with conventional ones Detonating cords with a closed cavity and the further advantage of less weakening of the Perforation force of the jet, the microcell filling weakening the jet to the extent less than the Wall closing the cavity, in which the proportion of the hollow microcells contained therein The superiority of the detonating cords according to the invention is not too low compared to the binding agent is also particularly good compared to conventional detonating cords with a closed cavity clearly from the fact that they are suitable for use at great depths: the The wall of the closed cavity quickly becomes very thick, in order to cope with the corresponding pressure to be able to resist.

According to the invention it was also found that certain foams have unexpected properties, due to their detonating cords provided with them compared to previously known and in immersed or In the non-submerged state, conventional detonating cords have considerable superiority.

According to the invention it was found that the blasting or penetration at the same time very reliable and very sharp and accurate when the Microcell filling according to the invention hollow microcells made of glass, ceramics or silicates contains the noticeable improvement affects both directional accuracy and radiance. A kind of focusing of the Beam observed, which is considerably more concentrated and which is theoretically due to the shape of the detonating cord sheath follows the expected direction of propagation much more precisely than with one with otherwise the same Detonating cords achieved a beam that did not have any micro-cell filling with the aforementioned special micro-cells have, which in the following subsumed for abbreviation under the general term "microcells made of glass" will; This general designation is understood to mean all materials that have this effect to lead. The mentioned directional accuracy is of particular interest in the case of detonating cords Accordingly, new areas of application with high precision requirements open up.

As shown in FIGS. 14a, 14b and 14c and 15a, 15b and 15c can be seen, the quality of the perforation or the detachment or penetration improved according to the invention in an extraordinarily remarkable way 14a, 14b and 14c show the course of the groove when using a conventional one Detonating cord, while Figs. 15a, 15b and 15c den show schematic course of the groove using the same detonating cord, its cavity however, it is filled with a microcell filling with hollow microcells made of glass

It should be noted that the bottom of the furrow in the first case has irregular shape and the depth of the indentation is not constant the walls of the furrow roughly torn and as irregular as the edges of the furrow on the Surface of the metal piece. In contrast, when using the detonating cord according to the invention, a Observe very clean blasting: the bottom of the furrow is regular and has constant depth, the Walls of the furrow are V-shaped and smooth; the edges of the furrow are sharp and practically without roughness. However, the depth of the furrow is essentially the same in both cases. The depth is also practical

IO

the same for those heavily filled with microcells made of "glass" Micro-cell fillings and only slightly less if the proportion of binder is large. If indeed one slight energy dissipation of the beam in the filling can be determined, this is caused by the Compensates improvement in the direction of the beam that hits the wall below one of the normals approaching angle of incidence, the closest corresponding to the position of greatest effectiveness comes.

It is clear from this that in the context of this first and preferred embodiment according to the invention, numerous further developments are to be specified, which enable satisfactory solutions to corresponding special problems.

One of these embodiments is shown in FIG. 12; the example refers to a two-stage Filling with two different micro-cell fillings. In this case, for example, a first, very micro-cell-rich filling with little compressive strength and little Resistance to the passage of the beam applied at the bottom of the cavity, whereupon a second, denser and more resistant filling with low water absorption applied to the first layer will. The micro-cell filling can include a plurality of empty or micro-cell-filled cavities.

In Fig. 13, a detonating cord is shown, the Cavity is filled with hollow microcells 12 made of glass without a binder, which is covered with the help of a cover 11 can be retained, which is glued to the flank side of the detonating cord or with Admittedly, such a device is less suitable for use at great depths suitable, but brings the advantage of a beam improvement according to the invention without any damping effect. The properties achieved according to the invention are correspondingly excellent

According to a second preferred embodiment of the invention, the microcell filling contains hollow ones Microcells made of glass and does not completely fill the cavity of the detonating cords.

This embodiment leads accordingly to detonating cords, the detachment effect of which is improved, which, however, cannot be used in the opposite state.

In order for the improvement in blasting to be noticeable, it is essential that at least the bottom of the The cavity is covered with micro-cell filling containing hollow micro-cells made of glass If the beam is not deflected, it is favorable if the arrangement of the filling conforms to the symmetry of the whole the cavity takes into account d. This means that the foam is uniform in terms of shape and quantity on both sides of the plane of symmetry in the longitudinal direction of the cavity Such a filling is shown in FIG. 11th shown

In order to achieve a significant improvement in the break-off properties, it is not appropriate required that the entire surface of the cavity containing the hollow glass microcells Microcell filling is covered. The improvement is, however, all the greater when the cavity is completely covered (and at the same time symmetrically) is lined. Such devices are shown in FIGS. 8, 9 and 10

As in the case of the detonating cords and charges according to the first preferred embodiment of the invention it is also possible here to change the microcephalus filling in the Way to apply that the detonating cord is directly in the

30th

35

40

45

50

55

60 ideal distance so that the beam the can penetrate the corresponding wall with maximum effectiveness. One such embodiment is in Fig. 9 shown.

Depending on the type and mechanical properties of the microcell filling, it is possible to use the according to the second preferred embodiment of the invention obtained detonating cords completely rigid or, on the contrary, to maintain their own flexibility in practice. The following will be the main chemical and physical criteria explained in more detail, which the invention must correspond to usable micro-cell fillings.

Microcell fillings in the sense used here are understood to mean cellular materials made from consist of hollow microcells, which are optionally dispersed in a binder.

Such composite materials are increasingly called "syntactic foams" designated

This definition excludes in particular homogeneous cellular foams such as foams that consist of an elastomeric binder, for example by using a corresponding organic blowing agent such as methylene chloride or freon, which evaporates during curing, or one soluble salt that is dissolved after hardening, made cellular or porous. Such foams are not usable according to the invention, since they enjoy no interest in an application on land and are also too sensitive to water absorption and pressure when used in the submerged state. Furthermore, they do not lead to any Improving the quality of blasting.

Under hollow microcells, all cells become more regular or more irregularly geometrical Understood shape that have a wall completely closing off the hollow interior of the cell, the Cell can optionally consist of several cavities closed off from the environment. the The size of the cells is at least 0.01 mm and at most a few millimeters.

The properties of the detonating cords of the present invention are determined by several main factors. For example, in the case of use The greater the amount of binder and the smaller the dimension of the, the higher the compressive strength under water Cells or the greater their thickness with the same density. In this case, however, it becomes all the more noticeable Attenuation of the beam, i.e. a reduction in beam efficiency, noted for each specific According to the problem, a solution according to the invention can be specified. So can in the above Case has good compressive strength and a slightly dampened, but also little improved jet by using glass microcells pretty much large diameter but small thickness can be achieved, on the other hand, an equivalent pressure resistance and an improved jet of equivalent strength with small and thick cells and a smaller amount of binder.

The influence of the various parameters which determine the main properties of the microcell fillings which can be used according to the invention is derived from Table I below; in each case the other parameters are kept constant.

Table 1

Increase in
Binder content

Increasing the wall thickness

of cells

(with constant size)

other
materials

Increase in size

of cells

(with constant wall thickness)

Glass other

materials

Compressive strength

Resistance to water absorption

Radiance

Improvement of the detachment or piercing effect

Abbreviations:

+ + + = very cheap.

+ + = cheap.

+ = not very cheap.

- = unfavorable.

= very unfavorable.

~ = little change.

; ': Another important factor is the size of the

hl cavity of the detonating cord.

tj The size of the microcells can in principle be so

$. be larger, the larger the cavity, without the

|| mechanical properties of the filling as a result

S! to be worsened. In contrast, even will

> § this greatly enhances the effectiveness of the jet.

\ v A particularly preferred embodiment is in

i | in this case the further development shown in FIG. 12,

§ at the bottom of the cavity of a cargo large

ff Dimension with a first microcell filling 19 with

(I cells made of "glass" of smaller diameter and then

Il ßend with another micro cell filling 10 under

sf Use preferably the same binder or

; | a chemically compatible binding agent bell is layered, but which contains larger cells: on these

j | Way is obtained a filling that the beam through

> | the second layer only slightly dampens and the

|| Beam on exit due to the first layer in

|| is oriented more favorably.

; -S In contrast, in the borderline case, hollow

Ü Glass microspheres without the use of a binding

U by means of or a microcell filling with preferably

: i low binder content to be poured into the bottom of the cavity, the outer part of the

J; cavity with a lid made of binding agent, preferably

i j is tightly sealed with a small thickness.

There are numerous for use in the present invention

;;, types of microcells suitable; practically the only one

ι The selection criterion is that it has a hollow interior

ji must have space. Glasses that make up

Having microcells produced are beneficial for this

however, microcells made of borosilicates, ceramics or Glass silicates, particularly silica aluminates, are used such as the microspheres that occur in Hockofenaschen. From the point of view of improving the beam quality, all have named substances have a more or less pronounced positive effect, being microspheres made of glass have a particularly beneficial effect. But there are also other microcells in the same way applicable, but their influence on the beam quality is considerably less pronounced microspheres made of carbon, foundry residues, phenolic resins or, for example, made of vinylidene chloride-acrylonitrile copolymers can also be used in the same way. Substances in the form of microcellular aggregates are also suitable, but in particular

jo re microcells with internal strength against deformation and compression preferred to one too The high fragility of the microcells does not have to be compensated for by an increased binder content, which leads to a Beam attenuation would result.

J5 As binders according to the invention are also very good Numerous substances can be used, their selection being essentially dependent on those for the microcell filling desired properties such as compression strength, low water absorption, the Flexibility and other properties as well as other criteria such as the capacity to accommodate a large amount of microcells, good adhesion to the metal envelope of the load or even very low production costs depends here inorganic binders such as plaster of paris or substitutes for this on the basis of sodium silicate, semi-organic binders such as glass putty (based on Calcium carbonate and vegetable oil) or organic binders can be used. Among the organic

Such binders are thermoplastic resins such as polyurethanes, polyvinyl chloride, polystyrene, thermoplastic resins made from butylbenzyl phthalate plasticized, bitumen or the like, thermosetting resins such as Polyepoxides, unsaturated polyesters, or polyurethanes synthetic or natural elastomers such as natural rubber, butyl rubber, ethylene-propylene-diene monomers or the like. It is not excluded that the binder, at least when underwater application is not intended, be slightly cellular can.

The proportion by volume of micro cells in relation to the total volume of the micro cell filling does not play a role decisive role, since it was found that even in the complete absence of binders, a similar type of ge beam improvement occurs It can therefore according to the invention also natural inorganic homogeneous cellular materials such as pumice stone or synthetic materials like cellular or vesical

Glass can be used. A binder content of at least 15% by volume and at most about 50% by volume is cheap. However, lower contents can also be used, especially when used of very small size microcells that fill the spaces between the larger cells. In the This case obtainable filling, which is also encompassed by the invention, is for purposes of use Not very suitable under water, but very suitable for use on land favorable when the microcells are hollow glass spheres.

To improve the adhesion of the filling to the walls of the cavity of the detonating cord can all conventional methods can be used. For example, a layer of coating or a primer or finishing varnish applied to the metal surface or the metal cladding chemically or electrolytically. Since the beam geometry strongly depends on the Depending on the regularity of the geometry of the cavity, it is preferred according to the invention, not a mechanical one Apply surface treatment methods such as sandblasting.

The way in which the microcell filling is introduced into the cavity depends in particular on the size of the Cavity and the type of binder.

It can therefore be introduced, for example, by pouring, injecting, painting, troweling, etc. take place. If an organic crosslinkable binder is used, which are crosslinked accordingly must, for safety reasons, preferably a cold-crosslinkable or a low-temperature crosslinkable one Binder selected. However, this precaution is only applicable in the general case meet, in which the microcell filling into the cavity of a detonating cord already filled with the explosive charge is introduced. According to the invention, however, it is also possible to remove the explosive charge after it has been introduced to introduce the filling or to produce the detonating cord according to the invention by single-stage extrusion. According to a particularly preferred embodiment, a mass is made from the microcell filling preformed by casting and then glued into the cavity provided for receiving them.

The appropriately preformed mass can optionally also be used by the user himself before use the detonating cord can be inserted and fixed.

The invention had to overcome the prejudice that the presence of a solid material in the Cavity of detonating cords for jet formation could just be detrimental. In contrast, the Invention, however, represented a considerable technical advance, particularly in that it contained detonating cords indicates that can be used immersed to great depths and, if necessary, sufficient Retain flexibility, which means that the shape can be adjusted manually, for example by divers Application site itself is made possible. The invention Detonating cords can also be blown off or penetrated in a particularly advantageous manner with vastly improved sharpness and accuracy, being equally useful for applications are suitable on land as well as under water. The invention is therefore particularly applicable to suitable for most detonation systems

The principle of the invention is summarized in the open or closed cavity a Detonating cord for blasting off or perforating partially or completely with a microcell filling to be provided, which consists of hollow microcells, which see optionally in an organic or inorganic soft or rigid binders are embedded.

The invention is explained in more detail below with reference to examples from which some of the emerge from numerous uses;

ι ο the information is therefore not restrictive.

example 1

A soft detonating cord is used that has a reduced linear charge of 20 contains g / m of graphitized hexogen.

The cavity of the detonating cord is filled with a spatula with a microcell filling of the following composition filled:

With butyl benzyl phthalate

plasticized PVC 152 parts by weight

Carbon microspheres 50 parts by weight

As the thermoplastic resin, one made of 100 parts by weight and one made of 50 parts by weight of butylbenzyl phthalate highly plasticized polyvinyl chloride and 2 parts by weight lead sulfate used as stabilizers. The microspheres used are carbon microspheres with an average size of about 0.2 mm.

The microcell filling obtained adheres well to the lining of the detonating cord wall, which is their Retains elasticity.

The blasting strength was measured at a depth of 30 m on a block of low-carbon steel 1 cm thick examined. It was found that the detonation strength compared to a conventional detonating cord For submarine use with a closed cavity, but not filled with a microcell filling under the same conditions! 0% improved and only 3% compared to the blast strength was deteriorated, which in the country on the same steel block with the inventively used, However, detonating cord not filled with microcell filling was determined.

Example 2

A lead detonating cord with a charge of 12 g / m graphitized hexogen was used of this detonating cord, the distance between the two flanks was 10 mm and the depth of the cavity was 5 mm and the linear weight 480 g / m. A microcell filling with hollow microspheres was made Glass and an epoxy binder used. The foam was made from 100 g epoxy resin (epoxy equivalent 230 to 250), 20 g of amine hardener (amine equivalent 40 to 44) and 25 g of glass microspheres having a density of about 0.3 used, with 90% of the microspheres being made up of spheres in the size range between 0.02 and 0.08 mm passed.

The cavity of the detonating cord was completely filled with the filling mentioned above crossed out; the detonating cord obtained was on the same steel block as in Example 1 at a depth of 60 m tested

A notch of 5 now depth was obtained, which was very regular and clean, as in the schematic Manner from Figs. 15a, 15b and 15c emerges

The depth of the indentation was essentially the same as that of T Jier, not with filling

provided detonating cord was obtained, in contrast it is determined on the same block in open air however, the general appearance of the notch obtained in this case is considerably worse, as from the F i g. 14a, 14b and 14c can be seen

For this purpose 2 sheets of drawings

Claims (24)

Patent claims: 1. Detonating cords with a hollow charge effect and with an open recess or closed cavity, characterized in that the open recess or the closed cavity is partially or completely made up of a microcell filling possibly embedded in an organic or inorganic soft or solid binder. ten hollow microcells 2. detonating cords according to claim 1, characterized in that the arrangement of the microcell filling in the recess or in the cavity of the Corresponds to the overall symmetry of the recess 3. detonating cords according to claim 1 or 2, characterized in that the micro-cell filling on the Outside of the recess or the cavity is provided in such a way that the detonating cord on the wall to be blasted off is at the optimal distance for the function 4. detonating cords according to any one of claims 1 to 3, characterized in that the microcell filling encloses one or more empty cavities 5. detonating cords according to any one of claims 1 to 4, characterized in that the microcell filling includes one or more cavities which are filled with free hollow microcells. 6. detonating cords according to any one of claims 1 to 5, characterized in that the microcell filling contains at least two types of different microcells 7. detonating cords according to any one of claims 1 to 6, characterized in that the microcell filling is not embedded in a binder hollow microspheres made of glass 8. detonating cords according to any one of claims 1 to 7, characterized in that the micro cells from Consist of pumice stone or cellular glass. 9. detonating cords according to any one of claims 1 to 6 or 8, characterized in that they are used as Binders contain a synthetic or natural organic resin. 10. detonating cords according to claim 9, characterized in that they contain a thermoplastic resin as a binder. 11. detonating cords according to claim 9, characterized characterized in that they contain a thermosetting resin as a binder. 12. detonating cords according to claim 9, characterized in that they contain a synthetic or natural elastomer as a binder. 13. detonating cords according to claim 1, characterized in that they are a binder contain inorganic cement. 14. detonating cords according to claim 13, characterized in that they are plaster of paris as a binder, Contains substitutes for plaster of paris, sodium silicate or glass putty. so 15. detonating cords according to any one of claims 1 to 14, characterized in that the microcells used have a size of 0.01 to 10 mm exhibit. 16. detonating cords according to any one of claims 1 to 15, characterized in that the microcells used consist of a synthetic organic material. 17. detonating cords according to claim 16, characterized in that the microcells used consist of a phenolic resin or vinylidene chloride-acrylonitrile copolymers. 18. detonating cords according to any one of claims 1 to 15, characterized in that the microcells used are made of an inorganic material exist. 19. detonating cords according to claim 18, characterized in that the microcells used consist of a glass, borosilicates, a ceramic material, silicoaluminates or carbon. 20. Detonating cords according to any one of claims 1 to 19, characterized in that the microcells used are hollow microspheres. 21. detonating cords according to any one of claims 1 to 6 and 8 to 20, characterized in that the Amount of the binding agent is 0 to 50% by volume and preferably more than 15% by volume 22. A method for producing the detonating cords according to any one of claims 1 to 21, characterized characterized in that the recess or the cavity by pouring or pouring, injection, Brushing, spatula or the like partially or completely with a microcell filling, optionally in an organic or inorganic one soft or solid binder embedded hollow microcells is filled. 23. The method according to claim 22, characterized in that one of the dimensions of the Well or the cavity adapted preformed microcell filling is prefabricated, the is then glued into the recess or the cavity. 24. Use of the detonating cords according to one of claims 1 to 21 for detonating and Perforating walls.