GB1233138A - - Google Patents

Info

Publication number
GB1233138A
GB1233138A GB1661569A GB1233138DA GB1233138A GB 1233138 A GB1233138 A GB 1233138A GB 1661569 A GB1661569 A GB 1661569A GB 1233138D A GB1233138D A GB 1233138DA GB 1233138 A GB1233138 A GB 1233138A
Authority
GB
United Kingdom
Prior art keywords
detonating cord
downline
charge
blasting
ctmtn
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.)
Expired
Application number
GB1661569A
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 filed Critical
Publication of GB1233138A publication Critical patent/GB1233138A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

1,233,138. Blasting. IMPERIAL CHEMICAL INDUSTRIES Ltd. 27 Feb., 1970 [31 March, 1969], No. 16615/69. Heading E1F. [Also in Division F3] A method of blasting comprises positioning a downline of detonating cord 21, Fig. 3, in a shothole, loading a blasting agent 23 into the shothole and, at selected stages (a), (b) &c of the loading, slidably connecting to the down-, line a primer assembly 12, 13 and 16. The primer assembly for initiating the blasting agent comprises a priming charge 11 Fig. 1 of high explosive, a connecting length of detonating cord 13, and a connector 16 adapted to hold the detonating cord in close lengthwise proximity to a downline 21 of detonating cord while permitting it to be slidably moved along the downline. The connector 16 is formed of polyethylene and is provided with two overlapping bores 15 and 20 whereby the downline and detonating cord can be held in contact. A third bore 17 permits the end of the detonating cord to be doubled back. The end of the detonating cord is covered by a water-proof silicone-rubber composition 18 and a metal cap 19. The charge 11 has a velocity of detonation of at least 6,500 m/sec and comprises cast or pressed PETN and TNT in ratio of 40:60 to 60:40, tetryl, CTMTN, or mixtures of CTMTN and TNT. The charge is contained in a polyethylene container 12 and may consist of several smaller charges placed end to end. The charge is circular or rectangular in cross-section, and has a length to maximum cross-section dimension ratio of 3:1 to 5:1.
GB1661569A 1969-03-31 1969-03-31 Expired GB1233138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1661569 1969-03-31

Publications (1)

Publication Number Publication Date
GB1233138A true GB1233138A (en) 1971-05-26

Family

ID=10080517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1661569A Expired GB1233138A (en) 1969-03-31 1969-03-31

Country Status (7)

Country Link
US (1) US3713384A (en)
CA (1) CA932583A (en)
DE (1) DE2015286C3 (en)
FR (1) FR2036008B1 (en)
GB (1) GB1233138A (en)
NO (1) NO121589B (en)
OA (1) OA03245A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA727873B (en) * 1971-12-01 1974-06-26 Nitro Nobel Ab Propagation device and initiation system for low energy fuses
US3880080A (en) * 1973-04-06 1975-04-29 Ireco Chemicals Booster for explosive blasting agents
US4098189A (en) * 1976-09-28 1978-07-04 Harry Holm Method and apparatus for preparing an explosive charge
USRE31953E (en) * 1976-11-11 1985-07-23 Austin Powder Company Method of charging a borehole
US4141296A (en) * 1976-11-11 1979-02-27 Austin Powder Company Carrier for explosive primer and method of using same
US4133247A (en) * 1976-11-11 1979-01-09 Austin Powder Company Carrier for explosive primer and method of using same
USRE30621E (en) * 1980-04-16 1981-05-26 Austin Powder Company Carrier for explosive primer and method of using same
SE452880B (en) * 1985-07-01 1987-12-21 Nitro Nobel Ab SET AND DEVICE FOR CONNECTING STUBINS
US4716832A (en) * 1986-09-18 1988-01-05 Halliburton Company High temperature high pressure detonator
US4953464A (en) * 1987-07-13 1990-09-04 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US4821645A (en) * 1987-07-13 1989-04-18 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
SE462540B (en) * 1988-12-08 1990-07-09 Bofors Ab SETTING AND DEVICE TO ACHIEVE INITIATION AND EXTRA FAST OVERTURNING OF POWDER AND PYROTECHNICAL KITS OF OPERETREED THE TYPE THAT IS LARGE LONG IN THE CREATIVE SECTION TO ITS SECTION
US5086702A (en) * 1990-04-12 1992-02-11 Atlas Powder Company Modular blasting system
US5162606A (en) * 1990-04-12 1992-11-10 Atlas Powder Company Modular blasting system
CA2037589C (en) * 1990-11-05 1994-09-06 Richard Joseph Michna Low-energy blasting initiation system, method and surface connection therefor
US5204492A (en) * 1991-10-30 1993-04-20 Ici Explosives Usa Inc. Low noise, low shrapnel detonator assembly for initiating signal transmission lines
US5171935A (en) * 1992-11-05 1992-12-15 The Ensign-Bickford Company Low-energy blasting initiation system method and surface connection thereof
US6186069B1 (en) * 1998-04-09 2001-02-13 Ensign-Bickford (South Africa Proprietary) Limited Explosives booster
WO2002037050A1 (en) * 2000-11-02 2002-05-10 Zaklady Tworzyw Sztucznych Nitron S.A. Detonating cord-booster

Also Published As

Publication number Publication date
DE2015286C3 (en) 1973-01-04
US3713384A (en) 1973-01-30
FR2036008A1 (en) 1970-12-24
DE2015286A1 (en) 1971-01-28
FR2036008B1 (en) 1976-01-16
NO121589B (en) 1971-03-15
CA932583A (en) 1973-08-28
OA03245A (en) 1970-12-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee