WO2017205881A1 - Procédé de dynamitage de trou de mine à ciel ouvert - Google Patents

Procédé de dynamitage de trou de mine à ciel ouvert Download PDF

Info

Publication number
WO2017205881A1
WO2017205881A1 PCT/ZA2017/050031 ZA2017050031W WO2017205881A1 WO 2017205881 A1 WO2017205881 A1 WO 2017205881A1 ZA 2017050031 W ZA2017050031 W ZA 2017050031W WO 2017205881 A1 WO2017205881 A1 WO 2017205881A1
Authority
WO
WIPO (PCT)
Prior art keywords
blast hole
propellant powder
hole
stemming
charge
Prior art date
Application number
PCT/ZA2017/050031
Other languages
English (en)
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
Priority to US16/304,475 priority Critical patent/US20190293399A1/en
Priority to EP17737714.0A priority patent/EP3465073A1/fr
Priority to AU2017270976A priority patent/AU2017270976A1/en
Publication of WO2017205881A1 publication Critical patent/WO2017205881A1/fr
Priority to ZA2018/08292A priority patent/ZA201808292B/en

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F42D3/04—Particular applications of blasting techniques for rock blasting
    • 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
    • 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

  • the invention relates to blasting in open cast mining.
  • the inventor is aware that in current open cast mining practices, blast hales are drilled and explosives are placed at or near the base of the blast, a detonator is inserted in the explosive, stemming material is tamped up against the exoplosive with a shock tube protruding out therethrough, further layers of explosives with detonators and stemming material follow, with a final stemming material layer closing up the blast hole while the shock tubes from the various detonators in the hole are connected to an initiation system.
  • the inventor thus proposes the invention described herebeiow to reduce or even solve the above problems.
  • the invention provides a method of blasting an open cast blast hole, the method including:
  • the igniter may be a MaxfireTM from Master Blaster.
  • the explosive in the blast hole may be initiated by a detonator having a delay of from 350 ms to 20 000 ms, and the propellant powder charge initiation system may include a delay time which is at least 25 ms shorter than that of the detonator in the same blast hole.
  • the propellant powder charge initiation system delay may thus be from 25 ms to 19 975 ms.
  • a blast hole starting from the bottom end thereof, there may be alternating explosive layers and stemming material layers with the propellant powder cartridge being located below the stemming material layer at the blast hole opening.
  • the propellant powder cartridge may be used similarly to how a pocket charge or satellite charge of explosive is used.
  • a preferred initiation method for the propeliant powder cartridge is an igniter having a delay time of 400 ms difference with that of the explosive charge in the same hole below the propeliant powder cartridge.
  • Blasting using the method may reduce the amount of fly rock and stemming ejection when compared to blasting using explosives only in the blast hole.
  • the first 4 lines of the blast (20 holes) were charged using the RBC cartridge in the stemming.
  • a base charge of 5 meters of explosives was used.
  • the RBC was placed in the hole. A further 750-1.730 meters of stemming was placed above the RBC.
  • the in-hole detonator was a 500ms.
  • the in-hole Maxfires Igniter was 100ms
  • the RBC was initiated by a delayed igniter which will be at least 300ms less than the delayed detonator used to initiate the explosives in the explosives filled portion of the hole. In this instance the timing will be a 100ms delay in the igniter and a 500ms delay in the detonator.
  • the explosives in the bottom portion of the hole in this instance were bulk emulsion manufactured by BME but could also be cartridge or Anfo.
  • the propeilant powder cartridge (RBC) will break the portion of the rock in which it is located (normally filled only with inert stemming material) known as the "cap”.
  • the RBC cartridge will initiate before the base charge moving the uncharged portion basically blocking off the hole so minimum glass ejection from the initiation of the explosives part of the hole is experienced. This operation will save the operator time and money in reducing secondary blasting.
  • the fragmentation in the "cap” from the first 4 rows is superior to the rest of the blast where the RBC was not used (320 holes) due to the confinement of the gasses in the RBC portion of the blast (first 4 rows).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

L'invention concerne un procédé de dynamitage d'un trou de mine à ciel ouvert, le procédé consistant à mettre en place une ou plusieurs charges explosives dans le trou de mine, à bourrer le trou de mine avec un matériau de bourrage au-dessus de ladite ou desdites charges explosives, à placer une cartouche de poudre propulsive dans le matériau de bourrage de telle sorte qu'il y a une couche de matériau de bourrage entre la cartouche de poudre propulsive et la charge explosive qui est la plus proche de l'extrémité ouverte du trou de mine, et à déclencher la charge de poudre propulsive avec un allumeur, ou un détonateur, ou une tête de fusée, ou tout système de déclenchement électronique.
PCT/ZA2017/050031 2016-05-26 2017-05-12 Procédé de dynamitage de trou de mine à ciel ouvert WO2017205881A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/304,475 US20190293399A1 (en) 2016-05-26 2017-05-12 A method of blasting an open cast blast hole
EP17737714.0A EP3465073A1 (fr) 2016-05-26 2017-05-12 Procédé de dynamitage de trou de mine à ciel ouvert
AU2017270976A AU2017270976A1 (en) 2016-05-26 2017-05-12 A method of blasting an open cast blast hole
ZA2018/08292A ZA201808292B (en) 2016-05-26 2018-12-07 A method of blasting an open cast blast hole

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2016/03599 2016-05-26
ZA201603599 2016-05-26

Publications (1)

Publication Number Publication Date
WO2017205881A1 true WO2017205881A1 (fr) 2017-11-30

Family

ID=59313349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2017/050031 WO2017205881A1 (fr) 2016-05-26 2017-05-12 Procédé de dynamitage de trou de mine à ciel ouvert

Country Status (5)

Country Link
US (1) US20190293399A1 (fr)
EP (1) EP3465073A1 (fr)
AU (1) AU2017270976A1 (fr)
WO (1) WO2017205881A1 (fr)
ZA (1) ZA201808292B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2678245C1 (ru) * 2018-04-19 2019-01-24 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Способ взрывного разрушения мерзлых горных пород

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US60573A (en) * 1866-12-18 Improvement in methods of blasting with nitroleum
US87372A (en) * 1869-03-02 Improvement in blasting- in oil-wells
DE1278908B (de) * 1963-07-18 1968-09-26 Rheinische Kalksteinwerke Verfahren zur die Sprengwirkung wesentlich unterstuetzenden Verdaemmung von Bohrloechern
US4167139A (en) * 1977-05-23 1979-09-11 Austin Powder Company Time delay primer and method of using same
EP1463871A1 (fr) * 2002-01-03 2004-10-06 Nxco International Limited Dispositif de bourrage active
CN102944147A (zh) * 2012-11-18 2013-02-27 中钢集团马鞍山矿山研究院有限公司 一种水力增压爆破方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347789A (en) * 1980-07-15 1982-09-07 Occidental Oil Shale, Inc. Downhole delay assembly for blasting with series delay
CA2545358C (fr) * 2003-11-28 2014-02-11 Orica Explosives Technology Pty Ltd. Methode de dynamitages multiples
US9389055B2 (en) * 2010-04-15 2016-07-12 Orica International Pte Ltd High energy blasting
PE20130595A1 (es) * 2011-10-14 2013-05-09 Famesa Explosivos S A C Tubo de transmision de senal con sello de retencion de iniciacion inversa

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US60573A (en) * 1866-12-18 Improvement in methods of blasting with nitroleum
US87372A (en) * 1869-03-02 Improvement in blasting- in oil-wells
DE1278908B (de) * 1963-07-18 1968-09-26 Rheinische Kalksteinwerke Verfahren zur die Sprengwirkung wesentlich unterstuetzenden Verdaemmung von Bohrloechern
US4167139A (en) * 1977-05-23 1979-09-11 Austin Powder Company Time delay primer and method of using same
EP1463871A1 (fr) * 2002-01-03 2004-10-06 Nxco International Limited Dispositif de bourrage active
CN102944147A (zh) * 2012-11-18 2013-02-27 中钢集团马鞍山矿山研究院有限公司 一种水力增压爆破方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2678245C1 (ru) * 2018-04-19 2019-01-24 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Способ взрывного разрушения мерзлых горных пород

Also Published As

Publication number Publication date
ZA201808292B (en) 2020-01-29
US20190293399A1 (en) 2019-09-26
EP3465073A1 (fr) 2019-04-10
AU2017270976A1 (en) 2019-01-17

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