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WO2004011397A2 - Tampon explosif pour trou de mine - Google Patents

Tampon explosif pour trou de mine Download PDF

Info

Publication number
WO2004011397A2
WO2004011397A2 PCT/ZA2003/000100 ZA0300100W WO2004011397A2 WO 2004011397 A2 WO2004011397 A2 WO 2004011397A2 ZA 0300100 W ZA0300100 W ZA 0300100W WO 2004011397 A2 WO2004011397 A2 WO 2004011397A2
Authority
WO
WIPO (PCT)
Prior art keywords
plug
blasting
screw
plug according
bore hole
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/ZA2003/000100
Other languages
English (en)
Other versions
WO2004011397A3 (fr
Inventor
Stanley Nance-Kivell
Frederick Berrange
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2003260143A priority Critical patent/AU2003260143A1/en
Publication of WO2004011397A2 publication Critical patent/WO2004011397A2/fr
Publication of WO2004011397A3 publication Critical patent/WO2004011397A3/fr
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
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/18—Plugs for boreholes

Definitions

  • This invention relates to a plug for blasting operations, for example in mining operations whether underground or surface mining, rock breaking and other similar operations.
  • Rubber or rubber-like plugs have been used in rock-breaking operations for many years and while there is a fair degree of blasting success there are still enough misfires and blasts which expel the plug prematurely, to seek better plugs.
  • a blasting plug includes a resilient cylindrical body and an element therein which is adapted to deform the body outwardly against the surface of a bore hole sufficiently for the body to form an effective plug during an explosion.
  • the inside surface of the body is frustoconical and the element is correspondingly frustoconical and is provided with means for drawing it into the body as to expand agairist the surface of the bore hole.
  • the means may comprise a screw accessible from the outside, for example by a head with a slot for receiving a tool to assist in the rotation of the screw - either for advancing the element in the body to expand the latter or, in the case of a misfire to move the element out of the body so that the plug can be easily and safely removed.
  • the means for drawing the element into the body is the explosion itself but it is preferred that the screw is used in addition, thereby providing a more accurate initial location prior to the explosion, and also providing the means for removing the element from the body in the event of a misfire.
  • the plug may be reused.
  • the body may be manufactured of a soft plastic material while the element should be made from a harder material.
  • the head of the screw may be provided with a retaining washer which abuts a shoulder of the body during withdrawal of the plug.
  • the head may include a slot with a bay at right angles so that the tool can be used in either direction.
  • the body and element may include passages for guides, fuses and cables.
  • Figure 1 is a selected side view of a plug according to the invention •
  • Figure 2 is a plan view of the resilient body
  • Figure 3 is an isometric view of a section of the resilient body
  • Figure 4 is an isometric view of the frustoconical element from one side thereof
  • Figure 5 is a similar view of the element from the other side;
  • Figure 6 is an isometric view of a screw for raising or lowering the frustoconical element; and Figure 7 is a similar view as Figure 6 of an alternative form of screw head.
  • a blasting plug includes a resilient cylindrical body 10 whose inside surface 12 is frustoconical.
  • An element 14 is movable against the inside surface of the cylindrical body so that when it moves upwardly the cylindrical body expands against the wall 16 of a bore hole.
  • the element 14 is movable by virtue of a screw 20 which has a head 22 with a cross groove 24 and bay 26 ( Figure 6) or spigots 27 ( Figure 7) so that the head may be turned with a suitable tool in either direction depending on whether it is required to move the element upwards (for forming a tight plug in the bore hole) or downwards (to relax the cylindrical body in case of a misfire so that the plug may be removed).
  • the cylindrical body 10 is preferably made from a soft polymeric material ,while the inner element is made from a higher density polymeric material.
  • the inside surface of the body includes a key ridge 28, which engages a complemental groove 30 in the element 14.
  • the body On the other side the body has a slot 32 to receive a blasting cable, the element having a corresponding passage 34 for the cable.
  • Expansion slits 36 are provided in the body to assist the expansion operation.
  • a washer 38 is mounted on the shaft of this screw to prevent the screw from being pulled out.
  • Figure 11 is a diagrammatic view of an assembly according to the invention in which the frustoconical element, or wedge, is in its initial position.
  • Figure 12 shows top and bottom views of the skirt while Figure 13 shows four views of the wedge. It will be noted that the skirt is provided with a guide rail and the wedge has a corresponding groove.
  • FIG 14 an assembly is shown inside a bore-hole A comprising a skirt B, a wedge C, a body of sand D and a space E for an explosive charge.
  • the sand is forced upwardly against the wedge which then enters the skirt and forces it to expand to form a tight fit in the bore-hole.
  • screw arrangement of the first embodiment may also be incorporated into the second embodiment arrangement.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Dowels (AREA)

Abstract

L'invention concerne un tampon explosif pour trou de mine, qui comporte un corps tronconique en matériau flexible, et un coeur en matériau dur, également de forme tronconique. Une vis permet de remonter le coeur dans le corps pour comprimer celui-ci contre la paroi du trou de mine. Ensuite, une explosion dans le trou de mine poursuit la poussée du coeur vers le haut et assure la mise en place d'un tampon explosif efficace.
PCT/ZA2003/000100 2002-07-27 2003-07-24 Tampon explosif pour trou de mine Ceased WO2004011397A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003260143A AU2003260143A1 (en) 2002-07-27 2003-07-24 Plug for bore-holes in mining operations

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ZA200204181 2002-07-27
ZA2002/4181 2002-07-27
ZA2002/7012 2002-09-02
ZA200207012 2002-09-02

Publications (2)

Publication Number Publication Date
WO2004011397A2 true WO2004011397A2 (fr) 2004-02-05
WO2004011397A3 WO2004011397A3 (fr) 2004-04-08

Family

ID=31191467

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2003/000100 Ceased WO2004011397A2 (fr) 2002-07-27 2003-07-24 Tampon explosif pour trou de mine

Country Status (2)

Country Link
AU (1) AU2003260143A1 (fr)
WO (1) WO2004011397A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006042342A1 (fr) * 2004-10-12 2006-04-20 Glen Robert Hawkins Bouchon de bourrage
CN104897015A (zh) * 2015-06-25 2015-09-09 中国科学技术大学 一种爆炸法堵孔方法
CN108680071A (zh) * 2018-07-30 2018-10-19 厦门岩特科技有限公司 一种二氧化碳爆破堵孔器
CN116518812A (zh) * 2023-05-15 2023-08-01 云南云铜马关有色金属有限责任公司 一种保护炮孔引出脚线的炮孔封堵装置及其施工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1587664A (en) * 1925-09-26 1926-06-08 Michael L Mcgraw Shot firer
GB320765A (en) * 1928-10-16 1929-10-24 David Hodge Improvements relating to tampings for bore-holes for blasting cartridges
US2112906A (en) * 1935-06-05 1938-04-05 Alvin F Dietz Accelerating blasting plug
US2632390A (en) * 1946-05-10 1953-03-24 Madill Alfred Louis Blast and dust control plug
DE949633C (de) * 1954-07-04 1956-09-20 Otto Lynker G M B H Besatzstopfen fuer Bohrloch-Sprengungen
US3264992A (en) * 1964-03-09 1966-08-09 Marlin E Beck Tamping plug
AU462018B2 (en) * 1970-09-21 1975-06-12 Ici Australia Limited Improvements in and relating to resilient stemming devices

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006042342A1 (fr) * 2004-10-12 2006-04-20 Glen Robert Hawkins Bouchon de bourrage
CN104897015A (zh) * 2015-06-25 2015-09-09 中国科学技术大学 一种爆炸法堵孔方法
CN104897015B (zh) * 2015-06-25 2017-01-18 中国科学技术大学 一种爆炸法堵孔方法
CN108680071A (zh) * 2018-07-30 2018-10-19 厦门岩特科技有限公司 一种二氧化碳爆破堵孔器
CN116518812A (zh) * 2023-05-15 2023-08-01 云南云铜马关有色金属有限责任公司 一种保护炮孔引出脚线的炮孔封堵装置及其施工方法

Also Published As

Publication number Publication date
AU2003260143A1 (en) 2004-02-16
WO2004011397A3 (fr) 2004-04-08
AU2003260143A8 (en) 2004-02-16

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