EP0057308A1 - Dispositif et procédé pour faire sauter des roches sousmarines - Google Patents
Dispositif et procédé pour faire sauter des roches sousmarines Download PDFInfo
- Publication number
- EP0057308A1 EP0057308A1 EP81303580A EP81303580A EP0057308A1 EP 0057308 A1 EP0057308 A1 EP 0057308A1 EP 81303580 A EP81303580 A EP 81303580A EP 81303580 A EP81303580 A EP 81303580A EP 0057308 A1 EP0057308 A1 EP 0057308A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blasting
- arcuate
- rocks
- 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.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 29
- 238000005422 blasting Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002360 explosive Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000004880 explosion Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
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 ⁇ tllat 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 explosive chamber having a member of arcuate cross-section made by casting material of high strength and a substantially flat bottom plate sealed to the arcuate member by securing means, the external surface of the arcuate member being moulded with a layer of reinforcement material, such as concrete.
- a method of blasting rocks and particularly undersea rocks comprises placing the apparatus according to said one aspect 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. scmi- 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)
- Underground Or Underwater Handling Of Building Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Fish Paste Products (AREA)
- Processing Of Meat And Fish (AREA)
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 | 1981-01-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0057308A1 true EP0057308A1 (fr) | 1982-08-11 |
EP0057308B1 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) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2134630A (en) * | 1983-01-10 | 1984-08-15 | Wang Su Jen | Apparatus and method of blasting rocks |
GB2178831A (en) * | 1985-07-29 | 1987-02-18 | Vetco Ltd C E | Apparatus for severing a wellhead |
FR2777648A1 (fr) * | 1996-09-05 | 1999-10-22 | France Etat | Dispositif de neutralisation d'engins explosifs |
GB2367608A (en) * | 2000-10-03 | 2002-04-10 | Secr Defence | A method for suppressing shock waves |
CN106969677A (zh) * | 2017-05-04 | 2017-07-21 | 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 |
Citations (6)
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 |
FR1055904A (fr) * | 1951-02-06 | 1954-02-23 | Projectile explosif à effet explosif dirigé | |
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 |
-
1981
- 1981-08-05 DE DE8181303580T patent/DE3170281D1/de not_active Expired
- 1981-08-05 AT AT81303580T patent/ATE13094T1/de active
- 1981-08-05 EP EP81303580A patent/EP0057308B1/fr not_active Expired
Patent Citations (6)
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 |
FR1055904A (fr) * | 1951-02-06 | 1954-02-23 | Projectile explosif à effet explosif dirigé | |
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 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2134630A (en) * | 1983-01-10 | 1984-08-15 | Wang Su Jen | Apparatus and method of blasting rocks |
GB2178831A (en) * | 1985-07-29 | 1987-02-18 | Vetco Ltd C E | Apparatus for severing a wellhead |
FR2777648A1 (fr) * | 1996-09-05 | 1999-10-22 | France Etat | Dispositif de neutralisation d'engins explosifs |
GB2367608A (en) * | 2000-10-03 | 2002-04-10 | Secr Defence | A method for suppressing shock waves |
GB2367608B (en) * | 2000-10-03 | 2004-10-06 | Secr Defence | A method for suppressing shock waves in a liquid medium |
CN106969677A (zh) * | 2017-05-04 | 2017-07-21 | 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 |
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 |
Also Published As
Publication number | Publication date |
---|---|
ATE13094T1 (de) | 1985-05-15 |
DE3170281D1 (en) | 1985-06-05 |
EP0057308B1 (fr) | 1985-05-02 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Owner name: ING. C. GREGORJ S.P.A. |
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