EP0057308B1 - Dispositif et procédé pour faire sauter des roches sousmarines - Google Patents

Dispositif et procédé pour faire sauter des roches sousmarines Download PDF

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Publication number
EP0057308B1
EP0057308B1 EP81303580A EP81303580A EP0057308B1 EP 0057308 B1 EP0057308 B1 EP 0057308B1 EP 81303580 A EP81303580 A EP 81303580A EP 81303580 A EP81303580 A EP 81303580A EP 0057308 B1 EP0057308 B1 EP 0057308B1
Authority
EP
European Patent Office
Prior art keywords
blasting
rocks
shell
explosive
bottom plate
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
EP81303580A
Other languages
German (de)
English (en)
Other versions
EP0057308A1 (fr
Inventor
A-Chin 5Th Floor No.8 Alley 7 Lane 106 Wang
Original Assignee
Wang Shu-Jen
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 Wang Shu-Jen filed Critical Wang Shu-Jen
Priority to AT81303580T priority Critical patent/ATE13094T1/de
Publication of EP0057308A1 publication Critical patent/EP0057308A1/fr
Application granted granted Critical
Publication of EP0057308B1 publication Critical patent/EP0057308B1/fr
Expired legal-status Critical Current

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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
    • 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

Definitions

  • This invention relates to an apparatus and a method of blasting undersea rocks.
  • a container having a conically shaped chamber for explosive is used made of materials of high strength but having a comparatively weak bottom made, for example, of wooden board, plastics, paper board, or the like so that when the container filled with explosives and attached to the surface of the rocks to be blasted, the force of explosion is directed to the target to thereby achieve better results.
  • Such a method can shorten the operating time by 50% and save more than 40% of the costs.
  • the blasting pressure generated by such apparatus tends to disperse into the surrounding water and the impact upon the rocks is greatly reduced. This is because the conical shape of the container has a comparatively weak resistance strength against the force of explosion inside the container.
  • the present invention seeks to provide an apparatus and method of blasting undersea rocks in which the foregoing difficulties are substantially mitigated.
  • the apparatus comprises an apparatus for blasting undersea rocks comprising an explosion chamber in which the explosive is housed, the explosion chamber having a shell covered by a layer of reinforcing material of high strength and a substantially flat bottom plate sealed to the shell by securing means, characterized in that the shell has a semi-spherical shape.
  • a method of blasting rocks and particularly undersea rocks comprises placing the apparatus according to the invention with the flat bottom plate in contact with the rocks and detonating the apparatus to provide a high explosion effect.
  • the apparatus and method of the present invention have the effect of simultaneously controlling and delaying the pressure generated by the explosion inside the container due to the arcuate cross-section of the upper part of the explosive chamber which has a higher tensile strength than the conical shape of the known apparatus.
  • the present invention When in use the present invention is filled with explosive on land and the apparatus is then taken to the predetermined location to carry out the blasting where the apparatus is submerged into the water with the flat bottom plate in contact with the rock. Upon detonation the flat bottom plate is the first to rupture and a highly pressurised blasting force is provided to the rock which has the effect of enlarging the area of the explosion.
  • the present invention overcomes these disadvantages by providing an explosive chamber of material of high strength made by casting with the purpose that the pressure generated from an explosion inside the chamber can be instantaneously controlled and delayed so pressure is enhanced to become a concentrated impact force by the arcuate portion of the chamber guarding and concentrating the explosive force toward the rocks.
  • the explosive chamber of the present invention for housing the explosive is made of a single kind of material by casting in a uniform thickness and after being sealed with the bottom plate, it can constrain the blasting pressure of the detonated explosives for a moment to enhance the force of blasting.
  • an explosive chamber 1 is formed by a semi-spherical, uniform thickness, cast-steel shell 2 having a flat bottom plate 3 secured to the shell by circumferentially disposed bolts 4, and a reinforcing layer 5 of high specific gravity, such as concrete, moulded over the external surface of the semi-spherical shell 2 to increase the weight and stability of the apparatus.
  • a handle 6 is mounted on the top portion of the semi-spherical shell and a tube 7 is provided under the handle and through the concrete layer 5 and shell 2 into the explosion chamber 1 for installation of an electrical ignition wire (not shown) to the explosive (also not shown).
  • the explosive chamber 1 is filled with explosive and the bottom plate 3 secured in position by the bolts 4 on land.
  • the apparatus is then taken to the required site and positioned against the rock to be blasted with an electrical detonating wire protruding from the tube 7.
  • On detonating the explosive the force is initially delayed and controlled by the shell and layer 5 and the blast force is then concentrated by the semi-spherical shape of the shell to be directed by a bottom plate 3 against the rock.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Processing Of Meat And Fish (AREA)
  • Fish Paste Products (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (5)

1. Dispositif pour faire sauter des roches sous- marines comprenant une chambre d'explosion dans laquelle l'exposif est logé, cette chambre (1) comportant une coque (2) recouverte d'une couche (5) de matière de renforcement très résistante et un plateau de fond en substance plat (3) relié de manière étanche à la coque (2) par des moyens d'assemblage (4), caractérisé en ce que la coque (2) est hémisphérique.
2. Dispositif suivant la revendication 1, dans lequel la matière de la coque (2) est de l'acier.
3. Dispositif suivant l'une ou l'autre des revendications précédentes, dans lequel la couche (5) de matière de renforcement est en béton.
4. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que le plateau de fond (3) est fait de la même matière que la coque (2).
5. Procédé pour faire sauter des roches sous- marines, suivant lequel on utilise un dispositif comportant une chambre à explosif contenant une matière explosive et formée en partie par un plateau de fond (3) qui doit être placé contre la roche à faire sauter et on fait détoner la matière explosive, caractérisé en ce que l'appareil est conforme à l'une quelconque des revendications précédentes.
EP81303580A 1981-01-29 1981-08-05 Dispositif et procédé pour faire sauter des roches sousmarines Expired EP0057308B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81303580T ATE13094T1 (de) 1981-01-29 1981-08-05 Vorrichtung und verfahren zum sprengen von unterwasser-felsgestein.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23008781A 1981-01-29 1981-01-29
US230087 1994-04-20

Publications (2)

Publication Number Publication Date
EP0057308A1 EP0057308A1 (fr) 1982-08-11
EP0057308B1 true EP0057308B1 (fr) 1985-05-02

Family

ID=22863907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81303580A Expired EP0057308B1 (fr) 1981-01-29 1981-08-05 Dispositif et procédé pour faire sauter des roches sousmarines

Country Status (3)

Country Link
EP (1) EP0057308B1 (fr)
AT (1) ATE13094T1 (fr)
DE (1) DE3170281D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134630B (en) * 1983-01-10 1986-10-15 Wang Su Jen Apparatus and method of blasting rocks
GB8519111D0 (en) * 1985-07-29 1985-09-04 Vetco Uk Ltd C E Severing wellhead
FR2777648B1 (fr) * 1996-09-05 2001-11-16 France Etat Dispositif de neutralisation d'engins explosifs
GB2367608B (en) * 2000-10-03 2004-10-06 Secr Defence A method for suppressing shock waves in a liquid medium
CN106969677B (zh) * 2017-05-04 2018-03-16 中水东北勘测设计研究有限责任公司 基于修正爆破作用指数的深水厚淤积覆盖下岩塞爆破方法
CN108548462A (zh) * 2018-06-19 2018-09-18 贵州大学 一种工程爆破用炸药固定装置
CN114199080A (zh) * 2021-11-30 2022-03-18 国能包头能源有限责任公司 一种用于爆破大块岩体二氧化碳爆破装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1738920A (en) * 1927-07-05 1929-12-10 Central Mine Equipment Company Blasting cartridge
US2247169A (en) * 1937-12-11 1941-06-24 Heitzman Safety Blasting Plug Blasting shell for surface blasting
CH293438A (de) * 1951-02-06 1953-09-30 Rochat Jean Sprengkörper mit gerichteter Sprengwirkung.
US3373686A (en) * 1965-03-01 1968-03-19 Lockheed Aircraft Corp Explosive actuator
US3374737A (en) * 1967-02-15 1968-03-26 Earl A. Pike Detonating tape
US4090447A (en) * 1975-02-26 1978-05-23 Johnsen Oscar A Directional blasting tubes and method of use

Also Published As

Publication number Publication date
EP0057308A1 (fr) 1982-08-11
ATE13094T1 (de) 1985-05-15
DE3170281D1 (en) 1985-06-05

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