WO2011035344A2 - Module a charge explosive - Google Patents

Module a charge explosive Download PDF

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Publication number
WO2011035344A2
WO2011035344A2 PCT/ZA2010/000027 ZA2010000027W WO2011035344A2 WO 2011035344 A2 WO2011035344 A2 WO 2011035344A2 ZA 2010000027 W ZA2010000027 W ZA 2010000027W WO 2011035344 A2 WO2011035344 A2 WO 2011035344A2
Authority
WO
WIPO (PCT)
Prior art keywords
blast charge
cartridge
compound
module
blast
Prior art date
Application number
PCT/ZA2010/000027
Other languages
English (en)
Other versions
WO2011035344A3 (fr
Inventor
Mark Rodney Davis
Original Assignee
Master Blaster Proprietary Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Master Blaster Proprietary Limited filed Critical Master Blaster Proprietary Limited
Publication of WO2011035344A2 publication Critical patent/WO2011035344A2/fr
Publication of WO2011035344A3 publication Critical patent/WO2011035344A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C7/00—Non-electric detonators; Blasting caps; Primers
    • 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
    • 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
    • F42B3/087—Flexible or deformable blasting cartridges, e.g. bags or hoses for slurries
    • 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
    • F42B3/26—Arrangements for mounting initiators; Accessories therefor, e.g. tools

Definitions

  • the invention relates to a blast charge module.
  • the invention relates to a blast charge module for a detonator.
  • Explosives detonators are well known and used in many industries including underground mining, open cast mining, demolition, and excavation.
  • a typical detonator of the prior art is in the form of an aluminium tube into which are packed a delay substance which delays the transmission of a shock to the rest of the contents of the aluminium tube, an ignition compound (IC), a blast charge (BC), and shock tube which is inserted in communication with the delay so that when a detonation signal, in the form of a shock passing along the shock tube is transmitted to the detonator, after a predetermined delay, the IC ignites which sets off the BC thereby initiating an explosion in the explosive with which the detonator is in communication.
  • IC ignition compound
  • BC blast charge
  • a problem identified by the inventor is that these detonators are themselves explosive in nature and thus the handling and transportation thereof is onerous and the storage thereof and storekeeping needs to be tightly regulated. In the mining environment working time is lost whenever these detonators have to be transported underground or to a work face as such transportation has to be carried out when the workers have been removed from potential harms way.
  • a blast charge module which is in the form of a body including a blast charge compound and which module is a separate unit from a cartridge with which it will be used, said body including attachment means for attaching the body to the cartridge which contains an ignition compound so that the ignition compound and blast charge compound are in operative proximity to each other whereby when the module is attached to the cartridge, when the ignition compound is ignited the blast charge is set off as a detonator.
  • the cartridge may be an aluminium tube into which an ignition compound, and optionally a delay compound, are packed.
  • the cartridge may include attachment means complementary to the attachment means of the body so that, in use, the cartridge and body are securely attached to each other.
  • the attachment means of both the cartridge and the body may be screw threads.
  • the screw threads may be square screw threads.
  • the attachment means may be a snap on fitting whereby the body is urged onto the cartridge and snapped into position so that it is securely retained on the cartridge.
  • the body may be in the form of a cap which has a larger inner diameter than the outer diameter of the cartridge, whereby attachment means on an inner surface of the cap engage attachment means on an outer surface of the cartridge over at least a portion of the longitudinal extent of the cartridge.
  • the body may be in the form of an annular sleeve, the blast charge being retained in the annulus formed between an inner and outer wall of the sleeve.
  • the cap may be in the form of an aluminium envelope, the blast charge compound being retained within the envelope.
  • the aluminium envelope may be torroidal or substantially torroidal engaging with a recess in an outer surface of the cartridge thereby securing the body in position.
  • the cap may include a frangible portion which, in use, faces the ignition compound so that when the module is urged against the ignition compound end of the cartridge during attachment thereof, the blast charge in the cap is brought into close proximity or contact with the ignition compound.
  • the cap may include a rupturable portion which is made of a thinner or otherwise weakened material to permit rupturing thereof to permit the transmission of a signal from the cartridge to the charge in the body thereby to detonate the charge.
  • the cartridge and body When assembled, the cartridge and body form a detonator assembly which may be used in a similar manner to a conventional unitary detonator.
  • the blast charge module may have a tracking device provided thereon so that its movements can be tracked independently of the movements of the cartridge. This is particularly useful if the blast charge module is transported separately from the cartridges for security reasons and the location of each and every blast charge module is desired.
  • the tracking device may be provided within the charge material, on an outer surface of the body, or at an interface between the body and the cartridge.
  • the tracking device may an RF-ID tag.
  • the RF-ID tag may be of the type having a circuit printed on a label and which transmits a signal to a receiver when activated, for example, by electromagnetic radiation.
  • the blast charge module may be used together with a pentalite booster in above ground applications in which case it is used to detonate the booster when a signal received by means of a detonation cord.
  • the blast charge unit is stored separately from the detonation cord, and may even be tracked to reduce the risk of blast charge modules going astray.
  • a method of assembling a detonator at or proximate a point of use thereof including the steps of: transporting one or more tubes containing at least an ignition compound and having a signal transmission line to or proximate the point of use; and transporting separately from said tubes to the point of use one or more blast charge modules, each of which is in the form of a body including a blast charge compound, said body including attachment means for attaching the body to the tube which contains the ignition compound so that when attached together the ignition compound and blast charge compound are in operative proximity to each other whereby when the ignition compound is ignited the blast charge is set off in the same manner as a detonator.
  • the method includes the step of assembling a detonator on-site by attaching the blast charge module to the ignition compound containing tube thereby emulating a standard detonator.
  • the detonator thus assembled may include an aluminium tube having the ignition charge, a delay compound and a signal transmission line, such as a shock tube, crimped therein, with the blast charge module securely attached contiguously with the ignition charge end of the tube.
  • the invention extends to a method of tracking the blast charge module by means of a device provided thereon so that its movements can be tracked.
  • the method may include activating an RF-ID tag provided on the blast charge module by electromagnetic radiation so that it transmits a signal to a receiver thereby identifying its location. 0 000027
  • FIG. 1 a schematic cross-section through a standard type detonator is shown, which detonator 10 has a body 12 which is an aluminium tube in which are contained a blast charge 14, an ignition compound 16 and a delay compound 18 and from which a shock tube 19 protrudes.
  • the shock tube end of the detonator 10 is crimped to retain the contents and the shock tube end therein.
  • FIG. 2 there is represented, again in schematic cross-section, a blast charge module 20 of the invention which is attached to an aluminium tube 22 which is similar to that of body 12 of the detonator 10, with the exception that it is open at the blast charge 24 end at which end the module 20 is attached thereto thereby closing the end.
  • Said tube 22 also contains the delay compound and the ignition compound and has a shock tube protruding therefrom while crimping is used to retain the shock tube in the tube 22.
  • the module 20 is in the form of a envelope type cap which has an inner surface 26 and an outer surface 28 with the blast charge 24 contained between the inner and outer surfaces 26, 28.
  • Attachment means in this example a clip on arrangement 30, 32 are provided both on a portion of the inner surface 26 and a portion the outer surface of the tube 22 so that they co-operate to securely attach the cap to the tube 22 in a predetermined relationship whereby the blast charge 24 and the ignition compound in the tube 22 are brought into very close proximity or contact with each other to promote the propagation of a detonation signal from the shock tube to the blast charge and onwards to an explosive charge in which it is being used.
  • the blast charge module 20 need only be attached to the tube 22 immediately prior to use thereof and the tube 22 and its contents are not considered explosives and can thus be transported easily and stored at the point of use until the blast charge module has been attached to form the detonator.
  • An RF-ID tag 34 is applied to the outer surface 36 of the blast charge module 20 so that the location of the blast charge module may be tracked.
  • the RF-ID tag also permits identification of a specific blast charge module 20 and the tracking the use thereof.
  • Radio-frequency identification is the use of an object (typically referred to as an RFID tag) applied to or incorporated into a product, animal, or person for the purpose of identification and tracking using radio waves. Some tags can be read from several meters away and beyond the line of sight of the reader.
  • Radio-frequency identification comprises interrogators (also known as readers), and tags (also known as labels).
  • RFID tags contain at least two parts. One is an integrated circuit for storing and processing information, modulating and demodulating a radio-frequency (RF) signal, and other specialized functions. The second is an antenna for receiving and transmitting the signal.
  • RF radio-frequency
  • RFID tags There are generally three types of RFID tags: active RFID tags, which contain a battery and can transmit signals autonomously, passive RFID tags, which have no battery and require an external source to provoke signal transmission, and battery assisted passive (BAP) RFID tags, which require an external source to wake up but have significant higher forward link capability providing greater range.
  • BAP battery assisted passive
  • RFID has many applications, for example, it is used in enterprise supply chain management to improve the efficiency of inventory tracking and management.
  • RF-ID tags could be used on the blast charge module 20, typically it is expected that passive RF-ID tags and readers would be used.
  • the advantages of the invention as illustrated appear to be ease of storage, ease of transportation, tracking of the blast charge component of a detonator, and generally reduction in risk because until the blast charge module has been attached the tube containing the ignition compound is a non-explosive, all of which improves mine safety and efficiency.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un module à charge explosive se présentant sous la forme d'un corps comprenant un composé de charge explosive et constituant une unité séparée d'une cartouche avec laquelle il sera utilisé. Ledit corps comprend un moyen d'attache permettant de fixer celui-ci à la cartouche qui contient un composé d'allumage, de manière que ledit composé d'allumage et le composé de charge explosive soient à proximité fonctionnelle l'un de l'autre. Ainsi, lorsque le module est fixé à la cartouche et que le composé d'allumage est allumé, la charge explosive est déclenchée comme un détonateur. L'invention s'étend également à un procédé d'assemblage d'un détonateur.
PCT/ZA2010/000027 2009-06-05 2010-05-31 Module a charge explosive WO2011035344A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2009/3926 2009-06-05
ZA200903926 2009-06-05

Publications (2)

Publication Number Publication Date
WO2011035344A2 true WO2011035344A2 (fr) 2011-03-24
WO2011035344A3 WO2011035344A3 (fr) 2011-10-13

Family

ID=43759336

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2010/000027 WO2011035344A2 (fr) 2009-06-05 2010-05-31 Module a charge explosive

Country Status (1)

Country Link
WO (1) WO2011035344A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2860189A (en) * 1988-02-08 1989-08-10 Aeci Limited Detonator for explosives
WO2006128257A1 (fr) * 2005-06-02 2006-12-07 Global Tracking Solutions Pty Ltd Mecanisme d'amorçage d'explosif, et systeme et procede pour le reperage de mecanismes d'amorçage identifiables
US7277015B1 (en) * 2005-05-17 2007-10-02 Morhard Robert C System and method for detecting, monitoring, tracking and identifying explosive materials
US7363860B2 (en) * 2004-11-30 2008-04-29 Weatherford/Lamb, Inc. Non-explosive two component initiator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2860189A (en) * 1988-02-08 1989-08-10 Aeci Limited Detonator for explosives
US7363860B2 (en) * 2004-11-30 2008-04-29 Weatherford/Lamb, Inc. Non-explosive two component initiator
US7277015B1 (en) * 2005-05-17 2007-10-02 Morhard Robert C System and method for detecting, monitoring, tracking and identifying explosive materials
WO2006128257A1 (fr) * 2005-06-02 2006-12-07 Global Tracking Solutions Pty Ltd Mecanisme d'amorçage d'explosif, et systeme et procede pour le reperage de mecanismes d'amorçage identifiables

Also Published As

Publication number Publication date
WO2011035344A3 (fr) 2011-10-13

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