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WO2006063369A2 - Cartouche de fragmentation de roche - Google Patents

Cartouche de fragmentation de roche Download PDF

Info

Publication number
WO2006063369A2
WO2006063369A2 PCT/ZA2005/000181 ZA2005000181W WO2006063369A2 WO 2006063369 A2 WO2006063369 A2 WO 2006063369A2 ZA 2005000181 W ZA2005000181 W ZA 2005000181W WO 2006063369 A2 WO2006063369 A2 WO 2006063369A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
closure
rock breaking
breaking cartridge
cartridge according
Prior art date
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.)
Ceased
Application number
PCT/ZA2005/000181
Other languages
English (en)
Other versions
WO2006063369A3 (fr
Inventor
Edward Walenty Tota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NXCO International Ltd
Original Assignee
NXCO International Ltd
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 NXCO International Ltd filed Critical NXCO International Ltd
Publication of WO2006063369A2 publication Critical patent/WO2006063369A2/fr
Publication of WO2006063369A3 publication Critical patent/WO2006063369A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F42B3/24—Cartridge closures or seals

Definitions

  • This invention relates to a rock breaking cartridge.
  • rock includes rock, ore, coal, concrete and any similar hard mass, whether above or underground, which is difficult to break or fracture. It is to be understood that “rock” is to be interpreted broadly.
  • High gas pressure is dependent on a number of factors including an efficient sealing of the gas which is produced, in the hole.
  • Effective sealing of the propellant contains the gas which is released by ignition of the propellant, at least initially, until an optimal pressurisation level has been reached.
  • the invention provides a rock breaking cartridge which includes a housing inside which is formed an enclosure, at least one opening into the enclosure, a closure which is releasably engageable with the opening, a propellant inside the enclosure, and means for igniting the propellant.
  • the housing may be of any appropriate shape and size but preferably comprises a tube.
  • the tube may have at least one opening at one end.
  • an opposing end of the tube is permanently sealed.
  • the tube has open opposed ends and a respective closure is releasably engageable with each opening.
  • the closure may be of any suitable kind and, for example, the closure may be engaged by means of a screw thread with the tube.
  • each closure and the tube are formed with corresponding interengageable bayonet-type formations.
  • the tube may have at least one groove on an inner wall which extends generally in a longitudinal sense with respect to the tube and at least one transverse locking formation, and the closure may be in the nature of a plug with at least one corresponding projection which is slidably engageable with a respective groove.
  • a tool may be provided for exerting a pushing and twisting force on the closure.
  • At least one locking member is used, when required, to fix the closure to the housing. This may be done in any appropriate way.
  • the locking member may be fixed to one of the housing and the closure and then be engageable with the other of the housing and the closure.
  • the locking member is engageable with formations on the housing and closure which are brought into register. These formations may be holes and the locking member may be a pin or rod which is passed through the holes.
  • the cartridge may include, in respect of each closure, a cap which is slidably engaged with the housing and which, preferably, is located inside the enclosure adjacent the closure.
  • the cap may be cup-shaped and an end wall of the cap may abut the respective closure.
  • the means for igniting the propellant may be any suitable igniter and a lead for actuating the igniter may extend between an interface of the closure and, where applicable, of the cap, on the one hand and an inner wall of the housing on the other hand.
  • the lead may for example be positioned inside a groove which is formed in an outer surface in a closure.
  • Figure 1 is a side view in cross section of a rock breaking cartridge according to the invention
  • Figure 2 is a perspective view on an enlarged scale of a closure for use in the cartridge of
  • Figure 3 is an end view of the cartridge shown in Figure 1;
  • Figure 4 is a view on a reduced scale of a tool for use with the closure; and Figures 5 and 6 show other cartridges according to the invention. DESCRIPTION OF PREFERRED EMBODIMENTS
  • FIG. 1 of the accompanying drawings illustrates a cartridge 10 according to the invention which includes a housing 12 which is made from a tube 14 of an appropriate length and diameter.
  • the tube can be made of plastic or steel or any other tough material which will not easily rupture when subjected to high gas pressure.
  • the tube is open at opposed ends 16 and 18. Each end is formed with two diametrically opposed grooves 20 and 22 respectively which extend for a short distance on an inner surface 24 of the tube in its axial direction. Each groove terminates in a corresponding transverse locking formation 26 and 28 respectively much in the nature of a bayonet-type arrangement.
  • Closures 30 and 32 are respectively engageable with the ends 16 and 18.
  • Figure 2 illustrates in perspective the closure 30.
  • the closure 32 has a similar construction.
  • the closure 30 is in the nature of a plug which includes a stout body 38 consisting of a substantially circular base 40 with diametrically opposed projections 42 and 44, and a centrally positioned upstanding rectangular section 46.
  • the body 38 is insertable into the end 16 with a fairly tight fit.
  • the projections 42 and 44 slide along the corresponding grooves 20 and 22 and then, if the body is turned the projections 42 and 44 slip into the locking formations 26 and 28 respectively.
  • the tube 14 forms an enclosure 50 which is occupied by a propellant 52.
  • propellant is to be interpreted broadly to include a propellant, a blasting agent, an explosive, a gas-evolving substance or any similar energetic material which, when initiated, generates high pressure combustion products typically at least partly in gaseous form.
  • An igniter 54 of a kind which is known in the art and which therefore is not further described herein is positioned inside the propellant.
  • a lead or igniter wire 56 extends from the igniter and through a groove 58 which is formed in an outer surface of the base 40 to a location which is external to the tube. This enables the igniter to be actuated, when desired. Again this aspect is known in the art and is therefore not further described herein.
  • the propellant 52 is located between opposed caps 60 and 62.
  • the cap 60 has an end wall 66 which abuts the closure 30 and a side wall 68 which is slidably engaged with a relatively tight fit inside the tube 14.
  • the cap 62 is for all practical purposes the same as the cap 60.
  • Figure 4 illustrates a tool 70 which includes a handle 72 and a fork-shaped formation 74 which can be fitted over the rectangular section 46 of a closure.
  • a tool 70 which includes a handle 72 and a fork-shaped formation 74 which can be fitted over the rectangular section 46 of a closure.
  • the closures 30 and 32 are activated to place the cartridge in an operative mode. This is done in the manner described in that each closure is pushed inwardly so that the projections 42 and 44 can be engaged in bayonet-type fashion, with the corresponding locking formations. When this has been done the closures can no longer slide within the tubular housing.
  • the cartridge then becomes a pressure-containment device which contains the gas which is evolved upon initiation of the propellant 52, until a relatively high pressure has been attained, at which point the cartridge ruptures. When this happens the wall of the tubular housing breaks, for the closures remain locked in position.
  • the pressure containment makes the breakage of fractured or jointed rock more efficient than the breakage which is produced by a normal propellant cartridge where the gas can escape to cracks and joints in the rock before sufficient pressure has been reached in the cartridge.
  • the cartridge of the invention does not rely on the hole in the rock to contain the gas which is evolved by the propellant for the tube 14, itself, is a pressure containment device which acts largely independently of the characteristics of the rock in which the hole is located.
  • the tube 14 is relatively thick walled, for example with a wall thickness of 5mm or more, and is made of a tough yet malleable material. It is therefore capable of containing substantial gas pressure before rupturing, and of expanding into close contact with a wall of a hole in which the cartridge is placed.
  • the use of the releasable closures means that a potential high pressure cartridge can be transported and stored in a safe manner using normal transport and storage means and without complying with additional safety requirements which apply to high pressure explosives.
  • the cartridge can rapidly be converted between its transport/storage mode and operative mode with ease, in an effective and reliable manner.
  • Figure 5 shows another cartridge 10A in two modes. A cartridge portion on the right is shown disassembled. A cartridge portion on the left is shown in an operative mode.
  • the cartridge has a tubular housing 12A and closures in the form of cup- shaped caps 3OA and 32A respectively which can fit with a frictional location onto respective ends 16A and 18A of the housing.
  • Holes 80 and 82 are formed in the housing, near its ends, and in the closures, respectively.
  • the cartridge is in a mode in which the caps are engaged with the housing but are not fixed thereto.
  • Figure 5 shows that the caps 3OA and 32A fit over the respective ends of the housing 12A. It is also possible to shape the components so that the caps slide into the respective ends of the housing.
  • Figure 6 shows a variation 10B of the arrangement in Figure 5.
  • a tubular housing 12B which contains propellant 52 is sealed at opposing ends by means of cup-shaped caps 88 which slide into the respective ends of the housing.
  • a relatively thick disk 90 is placed over a base 92 of each cap and is locked in position, when the cartridge is to be used, by means of a pin 94 which is passed through holes 96 in the housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Disintegrating Or Milling (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne une cartouche de fragmentation de roche présentant un logement tubulaire ayant une fermeture laquelle est engagée de façon libérable dans une ouverture située à une extrémité du logement. Un propulseur est contenu à l'intérieur du logement. Dans un mode de réalisation, la fermeture coulisse à l'intérieur du logement.
PCT/ZA2005/000181 2004-12-08 2005-12-08 Cartouche de fragmentation de roche Ceased WO2006063369A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200409928 2004-12-08
ZA2004/9928 2004-12-08

Publications (2)

Publication Number Publication Date
WO2006063369A2 true WO2006063369A2 (fr) 2006-06-15
WO2006063369A3 WO2006063369A3 (fr) 2006-08-03

Family

ID=36168858

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2005/000181 Ceased WO2006063369A2 (fr) 2004-12-08 2005-12-08 Cartouche de fragmentation de roche

Country Status (1)

Country Link
WO (1) WO2006063369A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267450A (zh) * 2013-05-21 2013-08-28 广东宏大爆破股份有限公司 一种防水耐高压深井爆破筒
GB2502043A (en) * 2012-03-27 2013-11-20 Controlled Blasting Solutions Ltd Directional gas pressure device
WO2015044623A1 (fr) 2013-09-30 2015-04-02 Controlled Blasting Solutions Limited Dispositif de pression de gaz directionnel amélioré
CN113587760A (zh) * 2021-08-03 2021-11-02 中南大学 热膨胀破岩管、硬岩地层基坑的组合破岩方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB462691A (en) * 1935-09-13 1937-03-15 James Taylor Improvements in or relating to blasting devices
US2755735A (en) * 1955-03-09 1956-07-24 Illinois Powder Mfg Company Explosive cartridge assembly
US4000696A (en) * 1975-09-05 1977-01-04 Excoa, Inc. Cartridge for two component field mixed explosive
US6679175B2 (en) * 2001-07-19 2004-01-20 Rocktek Limited Cartridge and method for small charge breaking
DE20206451U1 (de) * 2002-01-31 2002-09-19 Sprengstoffwerk Gnaschwitz GmbH, 02692 Gnaschwitz Plastische Sprengstoffzusammensetzung, insbesondere für eine kleinkalibrige Initialzündung für den Tunnelbau, und einen Booster zu dessen Anwendung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2502043A (en) * 2012-03-27 2013-11-20 Controlled Blasting Solutions Ltd Directional gas pressure device
GB2502043B (en) * 2012-03-27 2017-12-06 Controlled Blasting Solutions Ltd Improved directional gas pressure device
CN103267450A (zh) * 2013-05-21 2013-08-28 广东宏大爆破股份有限公司 一种防水耐高压深井爆破筒
WO2015044623A1 (fr) 2013-09-30 2015-04-02 Controlled Blasting Solutions Limited Dispositif de pression de gaz directionnel amélioré
CN113587760A (zh) * 2021-08-03 2021-11-02 中南大学 热膨胀破岩管、硬岩地层基坑的组合破岩方法
CN113587760B (zh) * 2021-08-03 2023-08-25 中南大学 热膨胀破岩管、硬岩地层基坑的组合破岩方法

Also Published As

Publication number Publication date
WO2006063369A3 (fr) 2006-08-03

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