CA2697711A1 - Engagement head for tensioning assembly - Google Patents
Engagement head for tensioning assembly Download PDFInfo
- Publication number
- CA2697711A1 CA2697711A1 CA2697711A CA2697711A CA2697711A1 CA 2697711 A1 CA2697711 A1 CA 2697711A1 CA 2697711 A CA2697711 A CA 2697711A CA 2697711 A CA2697711 A CA 2697711A CA 2697711 A1 CA2697711 A1 CA 2697711A1
- Authority
- CA
- Canada
- Prior art keywords
- engagement
- rock
- head
- tensioning assembly
- 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.)
- Abandoned
Links
- 239000011435 rock Substances 0.000 claims abstract 25
- 230000002401 inhibitory effect Effects 0.000 claims 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
An engagement head for a rock bolt tensioning assembly is disclosed that is profiled to include at least one key surface to inhibit rotation of the engagement head relative to a rock surface, either by direct engagement with the rock surface or through abutment with a plate-like member that is engageable with the rock surface.
Claims (17)
1. A tensioning assembly for a rock bolt, the tensioning assembly comprising an engagement head that in use is forced into either direct or indirect engagement with a rock surface, wherein the engagement head is profiled to include at least one key surface to inhibit rotation of the engagement head relative to the rock surface.
2. A tensioning assembly according to claim 1, wherein the engagement head is arranged to engage the rock surface through abutment with a plate-like member and wherein rotation of the engagement head relative to the plate-like member is inhibited by the at least one key surface.
3. A tensioning assembly according to claim 2, wherein the at least one key surface is formed as one or more flattened surfaces formed on the engagement head.
4. A tensioning assembly according to claim 2, wherein the at least one key surface comprises one or more lateral surfaces that project radially from an axis of the engagement head.
5. A tensioning assembly according to claim 4, wherein the one or more lateral surfaces project radially from a central zone towards the circumference of the engagement head.
6. A tensioning assembly according to claim 2, wherein the at least one key surface is located on a projection extending outwardly from the circumference of the head.
7. A tensioning assembly according to claim 2, wherein the at least one key surface is located in a slot extending into the head.
8. A tensioning assembly according to any preceding claim, wherein the engagement head forms part of a bearer member incorporating a passage through which the rock bolt extends.
9. A tensioning assembly according to claim 8, wherein the bearer member includes an inner surface that defines said passage and which incorporates a surface that cooperates with an abutment mounted to, or formed in, the rock bolt to provide a positive engagement therebetween that inhibits rotation of the bearer member relative to the abutment about the bolt in at least one direction.
10. A combination comprising a tensioning assembly according to any one of claims 2 to 9 and a plate-like member arranged to directly engage the rock surface, the plate like member including at least one plate key surface that cooperates with the at least one key surface of the engagement head to inhibit rotation therebetween.
11. An engagement head for a tensioning assembly for a rock bolt, the engagement head being for direct or indirect engagement with a rock surface, the engagement head being profiled to include at least one key surface to inhibit rotation of the engagement head relative to the rock surface.
12. An engagement head according to claim 11, wherein the at least one key surface is otherwise as claimed in claims 2 to 7.
13. An engagement assembly for engagement between a rock surface and a tensioning assembly, the engagement assembly comprising:
a plate-like member arranged to directly engage the rock surface, the plate like member including at least one plate key surface; and, a bearer member arranged to engage with, or form part of, the tensioning assembly, the bearer member having a head including at least one head key surface, wherein the head key surface and the plate key surface are adapted to engage such that rotation of the head relative to the rock surface is inhibited.
a plate-like member arranged to directly engage the rock surface, the plate like member including at least one plate key surface; and, a bearer member arranged to engage with, or form part of, the tensioning assembly, the bearer member having a head including at least one head key surface, wherein the head key surface and the plate key surface are adapted to engage such that rotation of the head relative to the rock surface is inhibited.
14. An engagement assembly according to claim 13, wherein the at least one head key surface is otherwise as claimed in claims 2 to 7.
15. A rock bolt assembly comprising a rock bolt having an axis, a bearer member for facing and urging against rock strata, the rock bolt being arranged to extend through the bearer member, and an abutment mounted to, or formed in the rock bolt, wherein the abutment and the bearer member incorporate cooperating surfaces that provide positive engagement therebetween that inhibit rotation of the abutment relative to the bearer member about the bolt axis in a least one direction.
16. A rock bolt assembly according to claim 15, further comprising an engagement assembly according to claim 13 or 14, wherein the bearer member forms part of the engagement assembly.
17. A method of inhibiting rotation of a tensioning assembly with respect to a rock surface, the tensioning assembly including a bearer member, the method comprising:
positioning a plate-like member in contact with the rock surface;
positioning a bearer member in contact with the plate like member; and causing a key surface in the bearer member to abut a corresponding key surface in the plate-like member.
positioning a plate-like member in contact with the rock surface;
positioning a bearer member in contact with the plate like member; and causing a key surface in the bearer member to abut a corresponding key surface in the plate-like member.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2009901318A AU2009901318A0 (en) | 2009-03-26 | Tension assembly | |
| AU2009901318 | 2009-03-26 | ||
| AU2009904751 | 2009-09-30 | ||
| AU2009904751A AU2009904751A0 (en) | 2009-09-30 | Engagement head for tensioning assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2697711A1 true CA2697711A1 (en) | 2010-09-26 |
Family
ID=42814298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2697711A Abandoned CA2697711A1 (en) | 2009-03-26 | 2010-03-25 | Engagement head for tensioning assembly |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20100266345A1 (en) |
| CN (1) | CN101915111A (en) |
| AU (1) | AU2010201212A1 (en) |
| CA (1) | CA2697711A1 (en) |
| ZA (1) | ZA201002116B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101471486B1 (en) * | 2014-02-04 | 2014-12-10 | 삼진스틸산업(주) | Removable ground anchor body using Rotation |
| AU2017261496B2 (en) * | 2016-11-14 | 2023-12-14 | JJ & D Innovations Pty Ltd | Load support system |
| ZA201907183B (en) * | 2018-11-02 | 2023-09-27 | Epiroc Holdings South Africa Pty Ltd | Cable anchor with anti-spin coupler |
| CN111397782B (en) * | 2020-03-25 | 2021-12-24 | 深圳市工勘岩土集团有限公司 | Stress estimation method for pre-stressed anchor cable |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO159678C (en) * | 1982-05-14 | 1989-01-25 | Weidmann H Ag | MOUNTAIN SECURING ANCHOR. |
| ATE36035T1 (en) * | 1985-01-17 | 1988-08-15 | Weidmann H Ag | ANCHORS FOR SECURING WALLS IN CAVITY STRUCTURES. |
| CA1331705C (en) * | 1988-07-26 | 1994-08-30 | Richard Roy Wood | Rock anchor |
| NO900391L (en) * | 1989-02-06 | 1990-08-07 | Weidmann H Ag | PROCEDURE, ANCHORING ELEMENT AND TENSION FOR TENSIONING OF A BAR. |
| US20060285929A1 (en) * | 2005-06-16 | 2006-12-21 | Valgora George G | Bearing plate having tab |
| US7625155B1 (en) * | 2009-03-25 | 2009-12-01 | Safe Overhead Systems, Inc. | Mine roof cable bolt assembly |
-
2010
- 2010-03-25 CA CA2697711A patent/CA2697711A1/en not_active Abandoned
- 2010-03-25 ZA ZA2010/02116A patent/ZA201002116B/en unknown
- 2010-03-25 US US12/731,531 patent/US20100266345A1/en not_active Abandoned
- 2010-03-25 AU AU2010201212A patent/AU2010201212A1/en not_active Abandoned
- 2010-03-26 CN CN2010101808192A patent/CN101915111A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| AU2010201212A1 (en) | 2010-10-14 |
| US20100266345A1 (en) | 2010-10-21 |
| ZA201002116B (en) | 2010-12-29 |
| CN101915111A (en) | 2010-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20141113 |
|
| FZDE | Dead |
Effective date: 20160329 |