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WO2003014045B1 - Narrow cast booster charges - Google Patents

Narrow cast booster charges

Info

Publication number
WO2003014045B1
WO2003014045B1 PCT/US2002/025237 US0225237W WO03014045B1 WO 2003014045 B1 WO2003014045 B1 WO 2003014045B1 US 0225237 W US0225237 W US 0225237W WO 03014045 B1 WO03014045 B1 WO 03014045B1
Authority
WO
WIPO (PCT)
Prior art keywords
booster
vanes
borehole
charges
charge
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/US2002/025237
Other languages
French (fr)
Other versions
WO2003014045A3 (en
WO2003014045A2 (en
Inventor
Robert A Lee
John Childs
Daniel P Sutula Jr
Michael A Dayton
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.)
Ensign Bickford Co
Original Assignee
Ensign Bickford Co
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 Ensign Bickford Co filed Critical Ensign Bickford Co
Priority to AU2002323083A priority Critical patent/AU2002323083A1/en
Publication of WO2003014045A2 publication Critical patent/WO2003014045A2/en
Publication of WO2003014045A3 publication Critical patent/WO2003014045A3/en
Publication of WO2003014045B1 publication Critical patent/WO2003014045B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • 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
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/04—Detonator charges not forming part of the fuze
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

The use of elongated booster or booster charges for initiating bulk explosives in boreholes provides advantages relative to conventional booster charges. Such booster charges are generally cylindrical in configuration and charges in accordance with this invention typically have a length-to-diameter ratio of at least 4:1, preferably greater than 4:1. In addition, the diameter of the booster charge is significantly less than the diameter of the borehole in which it is used, so that a significant amount of bulk explosive occupies the region in the borehole between the booster charge and the interior surface of the borehole. A vented stabilizer (14) is provided for combination with the booster in order to retain the booster centrally within the borehole. The stabilizer is preferably vented so that bulk explosive can flow through or past the booster and stabilizer assembly, and so that the assembly can be moved through the bulk explosive after the hole is filled.

Claims

AMENDED CLAIMS
[Received by the International Bureau on 17 July 2003 (17.07.03): new claims 19-27 added; remaining claims unchanged; ( I pages)]
19. The cast booster of claim 6 wherein the vented skirt portion comprises a plurality of vanes each having two ends and flat surfaces, the vanes being connected at one end to the base portion and being disposed radially about the base portion, with flat surfaces facing the booster charge.
20. The cast booster of claim 19 wherein the vanes are configured to define a curved surface for contact with the interior wall of a borehole.
21. The cast booster of claim 19 wherein the second ends of the vanes are connected to a support ring.
22. The cast booster of claim 21 wherein the vanes diverge outwardly from the booster and then curve back inwardly, and wherein the support ring has a diameter that is smaller than the greatest diameter encompassed by the vanes.
23. The cast booster of claim 1, claim 2 or claim 5 wherein the booster charge has an effective L:D ratio of greater than 4:1.
24. The cast booster of claim 3 wherein the booster charge has an effective L:D ratio of greater than 4:1.
25. The method of claim 10 wherein the booster charge has an effective L:D ratio of greater than 4:1.
26. The method of claim 11 or claim 14 wherein the booster charge has an effective L:D ratio of greater than 4:1.
27. The method of claim 13 wherein the booster charge has an effective L:D ratio of greater than 4:1.
PCT/US2002/025237 2001-08-08 2002-08-08 Narrow cast booster charges Ceased WO2003014045A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002323083A AU2002323083A1 (en) 2001-08-08 2002-08-08 Narrow cast booster charges

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31099001P 2001-08-08 2001-08-08
US60/310,990 2001-08-08

Publications (3)

Publication Number Publication Date
WO2003014045A2 WO2003014045A2 (en) 2003-02-20
WO2003014045A3 WO2003014045A3 (en) 2003-11-20
WO2003014045B1 true WO2003014045B1 (en) 2003-12-31

Family

ID=23204911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/025237 Ceased WO2003014045A2 (en) 2001-08-08 2002-08-08 Narrow cast booster charges

Country Status (2)

Country Link
AU (1) AU2002323083A1 (en)
WO (1) WO2003014045A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA200407781B (en) * 2003-10-03 2005-09-28 Int Tech Llc Blasting and blastiing accessory
US7778006B2 (en) 2006-04-28 2010-08-17 Orica Explosives Technology Pty Ltd. Wireless electronic booster, and methods of blasting

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276372A (en) * 1965-04-28 1966-10-04 Hercules Powder Co Ltd Booster device
US4938143A (en) * 1987-04-29 1990-07-03 Trojan Corporation Booster shaped for high-efficiency detonating
CA1315597C (en) * 1988-09-29 1993-04-06 Patrick D. Mclaughlin Primer centering device for large diameter blastholes
US5780764A (en) * 1996-01-11 1998-07-14 The Ensign-Bickford Company Booster explosive devices and combinations thereof with explosive accessory charges
US5661256A (en) * 1996-01-16 1997-08-26 The Ensign-Bickford Company Slider member for booster explosive charges
US5798477A (en) * 1996-12-18 1998-08-25 Givens; Richard W. Explosive cartridge assembly for presplitting rock
US6186069B1 (en) * 1998-04-09 2001-02-13 Ensign-Bickford (South Africa Proprietary) Limited Explosives booster

Also Published As

Publication number Publication date
AU2002323083A1 (en) 2003-02-24
WO2003014045A3 (en) 2003-11-20
WO2003014045A2 (en) 2003-02-20

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