US2313210A - Explosive load for mines - Google Patents

Explosive load for mines Download PDF

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Publication number
US2313210A
US2313210A US257008A US25700839A US2313210A US 2313210 A US2313210 A US 2313210A US 257008 A US257008 A US 257008A US 25700839 A US25700839 A US 25700839A US 2313210 A US2313210 A US 2313210A
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United States
Prior art keywords
explosive
tube
water
powders
mines
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US257008A
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English (en)
Inventor
Weber Guillaume
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Individual
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Individual
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Publication date
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Publication of US2313210A publication Critical patent/US2313210A/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/28—Cartridge cases characterised by the material used, e.g. coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive

Definitions

  • Explosive loads for mines which consist in a priming-cartridge, an explosive substance and a water cartridge, the instantaneous evaporation of the water being effected by the great heat developed by the priming-cartridge when it explodes.
  • metallic powders, iron filings or-clippings are added to the water or to the substances impregnated with water. This arrangement negatives the eiiect of these substances, since they are immersed in the water and cannot work as efficiently as they would if they were separated from the water and directly connected with a source of heat.
  • the loading tube or case is preferably made of paper, linen or similar fibrous substances in order to facilitate the introduction, into the blasthole, oi' a load of several cartridges and thus avoid losses of the explosive substance in the clefts of the ground.
  • the present invention has for its object certain improvements in and relating to the explosive loads for mines and consists in introducing the explosive cartridges of any sort, comprising those with liquid oxygen, into a special tube or case containing metallic and combustible powders.
  • the metallic powders are either coated on the'intericr surface of the tube, or they are lodged between one or more spirals of the tube or mixed with other substances between two or several spirals oi the tube.
  • Figure l is a perspective view of a portion of a tube, the interior surface of 'which is coated with metallic powders.
  • Figure 2 is a cross sectional view of a modified arrangement showing metallic powders lodged between one or more spires of a paper tube.
  • Figure.3 is a cross sectional view of a further modiiication in which spongy inactive incombustible substances are impregnated with water or cooling salts.
  • Figure 4 is a sectional view through a tube blank with metallic powders incorporated therein.
  • the loading tubes are also lt for the explosive.
  • the water can Y also be present in combination with other substances, such as infusorial earth, ground slag,
  • the combustible powders used can be alumi-
  • the combustible powders used can be aluminium, magnesium, silicium, calcium, iron, f silicoture of these powders.
  • the combustible powders will advantageously -be mixed with metallic oxides, for instance with oxides of iron or with other substances which hasten the oxidation process.
  • the explosive load can be reduced by using water cartridges; the quantity of smoke is also reduced in a proportion at least equal to the reduction of the explosive load.
  • the special loading tube Through the use of the special loading tube, the workmen, when working underground, are not any more inconvenienced by the smoke, as is generally the case when using dynamites, cheddites, compressed powders, etc., without any special loading tube.
  • the metallic powders of the tube are by other powders, like certain carbonates or other substances fit to extinguish fire.
  • the water cartridges used in the coal-pits will contain inactive, incombustible absorptive submagnesia carbonate, etc., preferably mixed with cooling salts.
  • the explosive loads thus constituted and combined with the ordinary safety explosive substance warrant a maximum of security in the coal-pits rendered dangerous .by fire-damp or dust.
  • the explosive loads contained in special tubes or cases, according to the present invention are also iit to be used for the felling of material in large quantities in mine-rooms or through use in ver-tical holes of a large diameter, and with water cartridges in the mediate stuiiing is used.
  • the me- By using the loading tubes according to the tallic powders are coated on to the ings-ide of a cylindrical tube which is preferably made of paper, while according to Fig. 2 the paper tube is spiraled and the metallic powders are lodged partially or ⁇ totally replaced l quarries where an interbetween one or more of the spirals.
  • a tube blank in which the metallic powders are incorporated therein. From this blank the tube can be rolled into shape and present much the same appearance as that tube'shown in Fig. l..
  • An explosive cartridge comprising an inner core of explosive material and an outer fibrous wrapper surrounding said core and being lim-A pregnated with at least one finely-divided, combustible metallic powder.
  • An explosive cartridge comprising an inner material ,and an outer nbrous layers around said core, said core of 'explosive sheet wrapped in fibrous sheet being impregnated between said layers with a finely-divided, combustible metallic powder.
  • An explosive cartridge comprising an inner core of explosive material and an outer brous wrapper surrounding said core, said wrapper being impregnated by a mixture of a finely-divided,

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
US257008A 1938-02-18 1939-02-17 Explosive load for mines Expired - Lifetime US2313210A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU2313210X 1938-02-18

Publications (1)

Publication Number Publication Date
US2313210A true US2313210A (en) 1943-03-09

Family

ID=19735057

Family Applications (1)

Application Number Title Priority Date Filing Date
US257008A Expired - Lifetime US2313210A (en) 1938-02-18 1939-02-17 Explosive load for mines

Country Status (3)

Country Link
US (1) US2313210A (enrdf_load_stackoverflow)
BE (1) BE432621A (enrdf_load_stackoverflow)
FR (1) FR850185A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE432621A (enrdf_load_stackoverflow)
FR850185A (fr) 1939-12-09

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