CA2541340A1 - Blasting - Google Patents
Blasting Download PDFInfo
- Publication number
- CA2541340A1 CA2541340A1 CA002541340A CA2541340A CA2541340A1 CA 2541340 A1 CA2541340 A1 CA 2541340A1 CA 002541340 A CA002541340 A CA 002541340A CA 2541340 A CA2541340 A CA 2541340A CA 2541340 A1 CA2541340 A1 CA 2541340A1
- Authority
- CA
- Canada
- Prior art keywords
- layer
- plunger material
- blasting
- drill hole
- plunger
- 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
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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
In blasting rock, a drill hole (12) is charged with spaced, composite layers (20), (30, 40) at different levels between an open mouth (14) and a blind bottom (16). Each composite layer is supported on a plug (22, 32, 42).
Flowable plunger material (24, 34, 44), e.g. drill cuttings, is supported on the respective plug followed by blast material (26, 36, 46), topped by a further layer of plunger material (28, 38, 48). The plunger material (48) at the top, is in the form of tamping. The composite layers are spaced respectively from one another and optionally, from the bottom (16). Initiators (27, 37, 47) can be actuated by means of a controller to initiate the blasting material to displace the layers of plunger material at speed to collide, e.g.
with the bottom and with one another to concentrate energy at the collision sites.
Flowable plunger material (24, 34, 44), e.g. drill cuttings, is supported on the respective plug followed by blast material (26, 36, 46), topped by a further layer of plunger material (28, 38, 48). The plunger material (48) at the top, is in the form of tamping. The composite layers are spaced respectively from one another and optionally, from the bottom (16). Initiators (27, 37, 47) can be actuated by means of a controller to initiate the blasting material to displace the layers of plunger material at speed to collide, e.g.
with the bottom and with one another to concentrate energy at the collision sites.
Claims (22)
1. A method of charging and blasting a drill hole extending between a mouth thereof at a surface, and a blind end or bottom thereof remote from the mouth, the method steps of charging the drift hole including providing in the drill hose at a relatively law level toward said bottom a lower layer of a blasting substance, and a lower layer of a plunger material proximately above the lower layer of blasting substance;
providing in the drill hole at a relatively high level remote from slid bottom a higher layer of a plunger material, spaced a predetermined distance above said lower layer of plunger material to form a spacing, and proximately above said higher layer of plunger material, a higher layer of a blasting substance:
placing initiators in association with the respective layers of blasting substances and connecting the initiators to a controller for actuating the initiators at predetermined time interval, the method steps of blasting the charged drill hole including actuating the initiators by means of the controller, thereby propelling the lower layer of plunger material by means of the lower layer of blasting substance into said spacing, and propelling the higher layer of plunger material by means of the higher layer of blasting substance into said spacing thereby causing the lower layer of plunger material and the higher layer of plunger material to impinge upon each other, and causing conversion of kinetic energy associated with the propelled layers of plunger material into pressure or shock waves to affect destruction of rock in the surrounding material.
providing in the drill hole at a relatively high level remote from slid bottom a higher layer of a plunger material, spaced a predetermined distance above said lower layer of plunger material to form a spacing, and proximately above said higher layer of plunger material, a higher layer of a blasting substance:
placing initiators in association with the respective layers of blasting substances and connecting the initiators to a controller for actuating the initiators at predetermined time interval, the method steps of blasting the charged drill hole including actuating the initiators by means of the controller, thereby propelling the lower layer of plunger material by means of the lower layer of blasting substance into said spacing, and propelling the higher layer of plunger material by means of the higher layer of blasting substance into said spacing thereby causing the lower layer of plunger material and the higher layer of plunger material to impinge upon each other, and causing conversion of kinetic energy associated with the propelled layers of plunger material into pressure or shock waves to affect destruction of rock in the surrounding material.
2, A method as claimed in Claim 1, in which the spacing between opposing surfaces of respectively said lower layer of plunger material end said higher layer of plunger material is between about 0,5 m and about 3 m.
3. A method as claimed in Claim 1 dr Claim 2 in which the respective layers of plunger materiel era flowable material allowing placement in the drill hale at the respective desired positions.
4. A method as claimed in any one of Claim 1 to Claim 3 inclusive, including tamping the drill hale proximate its mouth.
5. A method as claimed in any one of Claim 1 to Claim 4 inclusive in which said relatively low level is spatially adjacent a bottom of the drill hole and spaced above the bottom by a predetermined distance.
6. A method as claimed in Claim 5 in which the spacing between said relatively low level and the bottom is between about 0,5 m and about 3 m.
7. A method as claimed In Claim 8 or Claim 6, including supporting in each respective case the layer of plunger material and the layer of blasting substance an a plug capable of being positioned in the drill hole at a predetermined level.
8. A method as claimed in any one of Claim 5 to Claim 7 inclusive, including providing plunger material below the lower layer of blasting substance to provide a lower composite layer, providing plunger malarial above the higher layer of blasting substance to provide a higher composite layer, end providing one or more further composite layers of blasting substance and plunger material in the drill hole, with spacings in-between, in series along the drill hole.
9. A method as claimed in any one of Claim 1 to Claim 4 inclusive in which the lower layer of blasting substance is positioned proximate and is supported an the bottom of the drill hole.
10. A method as claimed in any one of Claim 1 to Claim 9 inclusive which includes actuating the initiators at time intervals to initiate the respective blasting substances simultaneously.
11. A method as claimed in claim 10 which includes actuating the initiators in a way selected from electrically, electronically, or pyrotechnically.
12. A method of mining including carrying out the method of any one of Claim 9 to Claim 11 on each of an array of drill holes.
13. A charged drill hole extending between a mouth thereof at a surface, and a blind end or bottom thereof remote from the mouth, including within the drill hole, a lower layer of a blasting substance at a relatively low level toward said bottom, and a lower layer of a plunger material proximately above the lower layer of blasting substance;
a higher layer of a plunger material at a relatively high level remote from said bottom, and spaced a predetermined distance above said lower layer of plunger material such as to form a spacing therebetween, and proximately above said higher layer of plunger material, a higher layer of a blasting substance;
initiators placed in association with the respective layers of blasting substances and having connectors for connection t4 a controller for actuating the initiators at predetermined time intervals, an arrangement being provided wherein the lower and higher layers of plunger material oppose each other spatially each layer of plunger material being backed by a layer of blasting substance, such that, in use, on actuation of the layers of blasting substance the layers of plunger material are propelled toward each other, to impinge upon each other and to convert kinetic energy associated with the propelled layers of plunger material into pressure or shock waves to destruct surrounding material.
a higher layer of a plunger material at a relatively high level remote from said bottom, and spaced a predetermined distance above said lower layer of plunger material such as to form a spacing therebetween, and proximately above said higher layer of plunger material, a higher layer of a blasting substance;
initiators placed in association with the respective layers of blasting substances and having connectors for connection t4 a controller for actuating the initiators at predetermined time intervals, an arrangement being provided wherein the lower and higher layers of plunger material oppose each other spatially each layer of plunger material being backed by a layer of blasting substance, such that, in use, on actuation of the layers of blasting substance the layers of plunger material are propelled toward each other, to impinge upon each other and to convert kinetic energy associated with the propelled layers of plunger material into pressure or shock waves to destruct surrounding material.
14. A charged drill hole as claimed in Claim 13 in which the spacing between opposing surfaces of respectively said lower layer and said higher layer of plunger material is between about 0.5 m end about 3 m.
15. A charged drill hole as claimed in Claim 13 or Claim 14 in which the respective layers of plunger material are flowable material allowing placement in the drip hole at the respective desired positions.
16. A charged drill hole as claimed in anyone of Claim 13 to Claim 15 inclusive, including tamping material closing the drill hale proximate its mouth.
17. A charged drill hole as claimed in any one of Claire 13 to Claim 16 inclusive in which said relatively low level is spatially adjacent a bottom of the drill hole and spaced above the bottom by a predetermined distance.
18. A charged drill hole as claimed in Claim 17 in which the spacing is between about 0,5 m and about 3 m.
19. A charged drill hole as claimed in Claim 17 or Claim 18 is which, in each respective case, the layer of plunger material and the layer of blasting substance is supported on a plug positioned in the drill hole at a predetermined level.
20. A charged drill hale as claimed in any one of Claim 17 to Claim 19 inclusive, including plunger material provided below the lower layer of blasting substance to form a lower composite layer, plunger material provided above the higher layer of blasting substance to form a higher composite layer, and one or more further composite layers of blasting substance and plunger material, with spacings in-between, in series along the drill hole.
21. A charged drill hole as claimed in any one of Claim 13 to Claim 18 inclusive, in which the lower layer of blasting substance is proximate the bottom and is supported on the bottom.
22. A blasting operation including an array of blast holes each in accordance with any one of Claim 13 to Claim 21 inclusive.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA200307748 | 2003-10-03 | ||
| ZA2003/7748 | 2003-10-03 | ||
| PCT/IB2004/003196 WO2005033618A1 (en) | 2003-10-03 | 2004-09-30 | Blasting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2541340A1 true CA2541340A1 (en) | 2005-04-14 |
| CA2541340C CA2541340C (en) | 2012-07-03 |
Family
ID=34423612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2541340A Expired - Fee Related CA2541340C (en) | 2003-10-03 | 2004-09-30 | Blasting |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070272109A1 (en) |
| AU (1) | AU2004278565B2 (en) |
| CA (1) | CA2541340C (en) |
| PE (1) | PE20050513A1 (en) |
| WO (1) | WO2005033618A1 (en) |
| ZA (1) | ZA200407780B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2740967C1 (en) * | 2020-08-31 | 2021-01-22 | Виктор Сергеевич Федотенко | Suspended well stem |
| RU2768270C1 (en) * | 2021-05-31 | 2022-03-23 | Виктор Сергеевич Федотенко | Suspended borehole stem |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2476994B1 (en) | 2011-01-14 | 2013-03-27 | Anita Lohr | Explosion method and assembly of multiple boreholes for filling with explosives |
| CN102589372B (en) * | 2012-03-21 | 2013-12-04 | 西安建筑科技大学 | Chamber and deep hole blasting method of gob |
| CN112611279A (en) * | 2020-12-18 | 2021-04-06 | 本钢板材股份有限公司 | Low-vibration high-quality blasting method |
| IL280235A (en) * | 2021-01-17 | 2022-08-01 | Tamar Israeli Advanced Quarrying Co Ltd | A process for increasing explosive potential at constant explosive amounts |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1278908B (en) * | 1963-07-18 | 1968-09-26 | Rheinische Kalksteinwerke | Process for the damming of boreholes, which significantly supports the explosive effect |
| US4513665A (en) * | 1983-06-06 | 1985-04-30 | Occidental Oil Shale, Inc. | Method for loading explosive charges into blastholes formed in a subterranean formation |
| ZA873769B (en) * | 1986-05-27 | 1988-04-27 | Specialised Polyurethan Applic | Borehole plug and method |
| US5035286A (en) * | 1988-03-10 | 1991-07-30 | Fitzgibbon Jr Daniel F | Methods and apparatus for field blasting of earth formations using inflatable devices for suspending explosives in boreholes |
| US5099763A (en) * | 1990-05-16 | 1992-03-31 | Eti Explosive Technologies International | Method of blasting |
| US5273110A (en) * | 1992-07-22 | 1993-12-28 | Fitzgibbon Jr Daniel F | Inflatable devices for suspending explosives and stemming materials in boreholes |
| US5497829A (en) * | 1993-11-17 | 1996-03-12 | Foam Concepts, Inc. | Expansion foam borehole plug and method |
| KR100316161B1 (en) * | 1999-09-16 | 2001-12-12 | 강대우 | Rock Blasting Method for using Air Tube |
| US6631684B2 (en) * | 1999-09-16 | 2003-10-14 | Dae Woo Kang | Rock blasting method using air bladders embedded in loading layers |
| AU2002214200B2 (en) * | 2000-11-21 | 2006-03-02 | International Technologies, Llc | Drillhole blasting |
-
2004
- 2004-09-27 ZA ZA2004/07780A patent/ZA200407780B/en unknown
- 2004-09-28 PE PE2004000944A patent/PE20050513A1/en active IP Right Grant
- 2004-09-30 CA CA2541340A patent/CA2541340C/en not_active Expired - Fee Related
- 2004-09-30 AU AU2004278565A patent/AU2004278565B2/en not_active Ceased
- 2004-09-30 US US10/574,377 patent/US20070272109A1/en not_active Abandoned
- 2004-09-30 WO PCT/IB2004/003196 patent/WO2005033618A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2740967C1 (en) * | 2020-08-31 | 2021-01-22 | Виктор Сергеевич Федотенко | Suspended well stem |
| RU2768270C1 (en) * | 2021-05-31 | 2022-03-23 | Виктор Сергеевич Федотенко | Suspended borehole stem |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005033618A1 (en) | 2005-04-14 |
| AU2004278565B2 (en) | 2009-01-22 |
| AU2004278565A1 (en) | 2005-04-14 |
| CA2541340C (en) | 2012-07-03 |
| PE20050513A1 (en) | 2005-07-26 |
| ZA200407780B (en) | 2005-09-28 |
| US20070272109A1 (en) | 2007-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20131001 |