DE1956982A1 - Powdered, semi-plastic, plastic or sludge-like explosives - Google Patents

Description

VASAG-CHE H IS Eseen, October 24th, 1969

Public limited company Pat / Dr.D / Kim

Pall 946

Powdery, semi-flat, plastic or real explosives

The invention relates to powdery, semi-plastic, plastic or tube-like explosives of reduced performance. The need often arises in the application of explosives! to use explosives with weakened performance 'or, for a given borehole durometer, to make a lower amount of energy effective than is possible with the usual explosive cartridges of 25 - 30 era 0 . When driving tunnels and galleries, the profile can be made much more dimensionally accurate if the shooting on the side walls and above all on the ridge is as gentle as possible. With bricklaying or concreting, the less building materials are required, the cleaner the profile was shot, ie the expansion becomes cheaper.

Similar conditions exist in salt mining, where especially the roofs are more stable, the gentler the soil ( sen was

So far, different paths have been taken towards this goal to reach! ■

The cartridge diameter was reduced to 15 and less mn * wrestles. Apart from the fact that the cartridges are cheap and disproportionately expensive with such low Durohmeesern, it sinks the strength of thin cartridges in the case of medium lengths is so high that proper loading of the boreholes is not possible more can be guaranteed. This disadvantage is «war de ·» to counteract that plastic or cardboard tubes are chosen as the outer groove, but the filling process is then noah "af" more agile and expensive * Reducing the

10982270726

• - 2 -

there are also limits, as most of them are commercial Explosives the limit diameter required for detoning is relatively high,

Attempts have also been made to determine the loading density of the explosive column to reduce by having empty spacers between each 2 explosive cartridges were introduced «This so-called cavity shooting let its use be limited to explosives» fabrics with high transfer capacity.

Furthermore, the energy content of explosives for a given diameter was determined by mixing in inert substances, e.g. Table salt in the explosives mixture decreased. This solution brings with it the disadvantage that the Schießsohwaden a disturbing, the salt content proportional content of hydrogen chloride exhibit"

It has also been suggested that the explosive be air or gas to be diluted, for example by Aufsohliuraen mushy up Eühlamra-like explosives, two possibilities have never been consideredί

The dispersion of air or gas (US patent 3 * 288,661) and the generation of air or gases in the explosive mass (US Pat. Nos. 3,390,028 and 3,390,030), but these types of explosives have the major disadvantage that they not storable, therefore not usable in cartridged form «·

Finally, the explosives became organic foam particles! like styrofoam βto. (Sohweizer patent specification 446.156) added and thus achieved an almost satisfactory result. It proved to be very disturbing Eiah that the organic substance taking part in the Detonatlonsreaktion versohlechtert and the oxygen balance. As a consequence of this, explosive calves are created with a greatly increased CO content, which do not allow intensive shooting underground or in tunnels that are difficult to ventilate. Attempts to use inorganic foamed filler "had failed so far because they either xu strong Saugvormögen for f! (Finished Sprsngatoffkomponenten have wi @ Perlite does Verraioulit · ^ i have strong alkali and explosives

10 98 2 2/07 26 '

change, such as peeled water glasses

Explosives have now been found that. the described

Do not have disadvantages. They are characterized by a content of fillers that contribute to the implementation of the explosive do not participate in the detonation and therefore do not influence the vapor composition, especially the CO content *

According to the invention, all fillers are particles of foam glass or other foamed silicate products of natural or artificial origin with a bulk density of 0.03 to 0.25 »preferably used below 0.1. Particularly suitable are " those particles which are produced according to German patent application P 16 71 243.9 and P 16 71 266.6; also those have a spherical shape and those that have a through * have a knife from 0.1 to 10 mm. Fillers of this type can in all common, powdery semi-plastic, plastic and muddy explosives. As a feature of the invention, the proportion of fillers is 10 to 10 90 # of the finished mix. In a further embodiment of the invention, the fillers are hydrophobized or hydrophilicized, depending on the type of explosive.

The following examples illustrate the invention! ( example 1

A plastic explosive of the ammongelite type has been used in «twa the following composition

Explosive oil 29 % di-trinitrotoluene 8 £ collodion wool i jC wood flour 2 JC ammonium nitrate 60 Jt>

an explosive density of about 1.5 - 1.6 g / cs. Will this

109822/0726

ORfQfNAL! NSPECTED

^ fyb6982

Explosives For every 500 kg of foam granules in accordance with P 16 71 243.9 or P 16 71 266.6 (bulk density 0.8, RauBerfUllung approx. 55 %) , the explosive density is reduced from approx. 1.55 to approx. 1.15 . With the addition of 750 cet of granulate per kg of explosive, the density even drops to 0.96 g / ea '.

The weight-related blasting power has remained constant, as the lead look bulge according to Trauzl of 400 evr shows. In relation to the volume, however, the power has dropped by about the ratio 100: 75 2 60 · The firing plumes remain - assuming the same inclusion and the same initiation conditions - unchanged »

Example 2

A slurry explosive, i.e. an aqueous explosive containing solids, for example the composition

Ammonite nitrate 55 * Sodium nitrate 9 Jt aluminum 25 Ji Guar flour 1 year water IO <

has a density of approx. 1.35 g / cm. In the same way as in Example 1, the density can be reduced to about 1.0 by adding 500 carg of granulate per kg of explosive and even to about 0.9 ^{when adding 750 cm 5 / kg.}

In order to ensure that the water present in the form of saturated salt solution penetrates as little as possible into the foam grain, it is advisable to make the granulate hydrophobic beforehand in a known manner, for example by impregnating with an acetone solution from Silloonttl

In the same way, TNT or other fuel-containing slurries are "poroelerable" with this foam ·

It is noteworthy that the crltisohe cartridge or charging column diameter (smallest Durohmesser at which Durohdetona— 'tion takes place) with comparable inclusion and initiation conditions is not increased, often even decreases.

/ ία 6 Mi / c.'Hfo

ORIGINAL INSPECTED

Claims (2)

Essen, 2 * 1.10.1969 Ί956982 Pat sntansprliohe Powdered ©, semi-plastic, plastic or slack hair Explosives of weakened performance, characterized duroh a content of fillers involved in the implementation of the Explosives do not participate in the detonation and hence the Schwadenzusammonsetzung, especially the Do not influence the CO content, 2. Powdery, semi-plastic, plastic or sludge-like Explosives according to claim 1, characterized in that particles of foam glass or others are used as fillers foamed ailicate-like products natural or of artificial origin with a bulk density of 0.03 hi 0.23, preferably below 0, i used «ground. 3, "Powdery", semi-plastic, plastic or cilia-like Explosives according to claim 2, d a ti u r ο h go k β η η 2 »1 0 h η a t, ilaü according to the German patent application P 1δ 71 2 ** 3.9 and P iß 7i 266.6 horgestallta particles k, i'uiv »rfiJralga, jhäi ^ p'iiistlj & lid) piaatlKnhi tsdirs" -aohlaaia ·· Λΐ-Uft * spraii «dtoii'j ^" ail Aii ^ Hloliaii i ill-j ^ _{0R! G1NAL} INSPECTED ί "I Ί:" '> 2/0 7 i Ö ΊΒ5Β982 characterized in that the particles have a spherical shape. 5 »Powdery **, semi-plastic, plastic, or so-like Explosives according to Claims i to 4, characterized in that they are raw, that the particles have a diameter of 0.1 to 10 ms . own, 6, Puiverföraige, semi-plastic, plastic or semi-plastic explosives according to Annprüchsn i to 5 »characterized by the fact that the share of the Partücol in the Sprengatof imasaa is ok up to 90 % , 7, Pulverfüraig ©, semi-plastic, plastic or Schlanua-like explosives exactly according to claims 1 to 6, characterized in that the fillers are »hydrophobized. 8, Pulverföraige, Halbplaatiaeh «, plastiaclis or Artlge Spriangstaffö gesaliö claims i to 6, d a d u r ü h ^ e marked, that the FUiIstoffö are hydrophilic, i U :) Β Il i fl 7 2 ο ORIGINAL INSPECTED