CA2490111A1 - Rock bolting system - Google Patents

Rock bolting system Download PDF

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Publication number
CA2490111A1
CA2490111A1 CA002490111A CA2490111A CA2490111A1 CA 2490111 A1 CA2490111 A1 CA 2490111A1 CA 002490111 A CA002490111 A CA 002490111A CA 2490111 A CA2490111 A CA 2490111A CA 2490111 A1 CA2490111 A1 CA 2490111A1
Authority
CA
Canada
Prior art keywords
tube
bolt
fitting
rock bolt
tendon
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
Application number
CA002490111A
Other languages
French (fr)
Other versions
CA2490111C (en
Inventor
Jeffrey Robert Fergusson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minova Australia Pty Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2490111A1 publication Critical patent/CA2490111A1/en
Application granted granted Critical
Publication of CA2490111C publication Critical patent/CA2490111C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • 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
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • 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
    • E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
    • 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)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The present invention discloses a tube (14) for rock bolts having either a cable tendon or a rod tendon. The tube is deformed to permit the tube to be coiled and yet also provide good keying between the tube and grout. In addition, a fitting (26, 46) for the rear end of the bolt is disclosed in which a grouting orifice (31) communicates with a cable passageway (34).
Furthermore, the use of two or more cable anchors (57) at the far end of the bolt is disclosed where the bolt is intended to be used in poor ground conditions, such as sandstone.

Claims (28)

1. A tube for rock bolts having either a cable tendon or a rod tendon, said tube being extruded from plastics material and deformed beyond its yield point at each of a plurality of longitudinally spaced apart locations extending along the length of the tube, said deformation at each said location occurring in at least two different directions.
2. The tube as claimed in claim 1 and deformed by inwardly directed compression.
3. The tube as claimed in claim 2 wherein at each said location said inwardly directed compression extends in two different directions making an angle with each other.
4. The tube as claimed in claim 3 wherein said angle iS substantially 90°.
5. The tube as claimed in claim 2 wherein at each said location said inwardly directed compression extends in three different directions.
6. The tube as claimed in claim 5 wherein the angle between said three directions is approximately 120°.
7. The tube as claimed in any one of claims 1-6 and able to be looped into a coil.
8. The tube as claimed in any one of claims 1-7 and fabricated from irrigation water supply tube.
9. The tube as claimed in any one of claims 1-8 and fabricated from high density polyethylene (HDPE).
10. A rock bolt having a tendon located within a tube as claimed in any one of claims 1-9.
11. The cable bolt as claimed in claim 10 wherein said tendon is formed from multi-strand steel cable and said bolt is looped into a coil.
12. An end fitting for a rock bolt, said fitting comprising a generally barrel-like shape having a front end, a rear end, a curved side wall and a longitudinal axis, and said fitting further having a tendon passageway extending between said front and rear ends, and a grouting orifice in said front end and leading into said cable passageway.
13. The fitting as claimed in claim 12 wherein said tendon passageway includes a cable anchor.
14. The fitting as claimed in claim 13 wherein said cable anchor includes a frusto-conical wedge.
15. The fitting as claimed in any one of claims 12-14 wherein said front end is substantially domed.
16. The fitting as claimed in any one of claims 12-14 wherein said front end is substantially flat.
17. The fitting as claimed in any one of claims 12-16 wherein said rear end is substantially flat.
18. The fitting as claimed in claim 17 wherein said substantially flat rear end is substantially perpendicular to said longitudinal axis.
19. A method of fabricating a tube for a rock bolt, said method comprising the step of radially deforming the side wall of said tube beyond its yield point at each of a plurality of longitudinally spaced apart locations extending along the length of the tube, said deformation at each said location occurring in at least two different directions.
20. The method as claimed in claim 19 including the step of creating said deformation by inwardly directed compression.
21. The method as claimed in claim 20 including the step of: at each said location inwardly directing said compression in two different directions making an angle with each other.
22. The method as claimed in claim 21 wherein said angle is substantially 90°.
23. The method as claimed in claim 20 including the step of: at each said location inwardly directing said compression in three different directions.
24. The method as claimed in claim 23 wherein the angle between said three directions is approximately 120°.
25. A rock bolt for use in poor ground conditions, said bolt having a near end and a far end, anchor means at said far end to anchor the far end adjacent the base of a blind hole formed in said ground, and tension means at said near end to tension said bolt after said far end has been anchored, wherein said anchor means comprises at least two anchor devices, each known per se, and connected in series on said bolt adjacent said far end.
26. The rock bolt as claimed in claim 25 wherein said anchor devices comprise shell anchors.
27. A method of securing a rock bolt in poor ground conditions, said method comprising the steps of:

providing at least two anchor devices, each known per se, at the far end of said rock bolt, inserting said rock bolt into a blind hole drilled in said ground, activating all said anchor devices, and tensioning said rock bolt.
28. The method as claimed in claim 27 wherein following tensioning of said rock bolt, said rock bolt is surrounded with grout.
CA2490111A 2002-06-21 2003-06-20 Rock bolting system Expired - Fee Related CA2490111C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPS3107 2002-06-21
AUPS3107A AUPS310702A0 (en) 2002-06-21 2002-06-21 Rock bolting system
PCT/AU2003/000760 WO2004001192A1 (en) 2002-06-21 2003-06-20 Rock bolting system

Publications (2)

Publication Number Publication Date
CA2490111A1 true CA2490111A1 (en) 2003-12-31
CA2490111C CA2490111C (en) 2012-03-13

Family

ID=3836668

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2490111A Expired - Fee Related CA2490111C (en) 2002-06-21 2003-06-20 Rock bolting system

Country Status (5)

Country Link
US (1) US20060093438A1 (en)
AU (1) AUPS310702A0 (en)
CA (1) CA2490111C (en)
NO (1) NO20050269L (en)
WO (1) WO2004001192A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190100998A1 (en) * 2015-06-23 2019-04-04 Ncm Innovations (Pty) Ltd. Groutable rock anchor assembly
US11215053B2 (en) * 2017-09-07 2022-01-04 Ncm Innovations (Pty) Ltd Adapted grout delivery sleeve

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPS310802A0 (en) * 2002-06-21 2002-07-11 Industrial Rollformers Pty Limited Yielding cable bolt
KR101395753B1 (en) * 2006-04-06 2014-05-16 가포드 피티와이 엘티디 A yielding rock bolt
US20100189515A1 (en) * 2006-08-14 2010-07-29 Brian Woolnough tensoning device
KR100915887B1 (en) 2006-08-22 2009-09-07 고려대학교 산학협력단 Apparatus for examining quality of Grout using for fixing rockbolt
AU2008303063B2 (en) * 2007-09-25 2014-12-18 Hilti Aktiengesellschaft Method for fixing a cable or tendon
DE102007055835A1 (en) * 2007-12-17 2009-06-25 Hilti Aktiengesellschaft protection element
EP2395198B1 (en) * 2010-06-14 2017-09-20 Minova International Limited Cable bolt
EP2603666B8 (en) * 2010-08-10 2017-05-24 DSI Underground IP Holdings Luxembourg S.à r.L. Fully grouted cable bolt
US8967916B2 (en) * 2011-05-05 2015-03-03 Earth Support Services, Inc. Mine roof support apparatus and system
SE539285C2 (en) 2013-02-07 2017-06-20 Rock Solutions North AB rock bolt
US10309221B2 (en) * 2014-10-28 2019-06-04 Fci Holdings Delaware, Inc. End coupling for a rock bolt
US10060809B1 (en) * 2016-10-27 2018-08-28 Larry C. Hoffman Friction stabilizer pull tester and method
CA2957748C (en) 2017-02-13 2018-05-01 Lyle Kenneth Adams Rock bolt seal
DE202017106065U1 (en) * 2017-10-06 2019-01-10 Manfred Schell Gmbh Drill Nail holding system
IT201800002456A1 (en) * 2018-02-07 2019-08-07 Thur Srl EXTENDED ELEMENT FOR CONNECTION FOR ANCHORAGES AND PROCEDURE FOR THE CONSTRUCTION AND INSTALLATION OF AN ELONGATED ELEMENT FOR CONNECTION FOR ANCHORAGES.
CN108412526B (en) * 2018-05-14 2023-12-15 重庆大学 Self-adaptive hierarchical early warning anchor rod
CN110118090B (en) * 2019-06-13 2024-03-22 河南理工大学 Protective structure for preventing earth surface bulge caused by tunnel grouting reinforcement
CN114607426A (en) * 2022-04-08 2022-06-10 中南大学 Full-length anchoring method for prestressed spring mechanical expansion shell end anchor hollow grouting long anchor cable
US20240328317A1 (en) * 2023-03-28 2024-10-03 Shandong University Of Science And Technology Multi-stage pressure yielding and anti-impact device for anchoring support

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
SE457894B (en) * 1985-06-17 1989-02-06 Atlas Copco Ab MAKE STABILIZING MOUNTAINS
SU1460313A1 (en) * 1987-01-07 1989-02-23 Институт Горного Дела Со Ан Ссср Method of setting a tubular roof bolt
US5018919A (en) * 1989-04-15 1991-05-28 Bergwerksverband Gmbh Combined rigid profile and stretching roof bolt with expansion element
DE4204533C2 (en) * 1992-02-15 1994-03-17 Gd Anker Gmbh & Co Kg Injection drill anchor
GB2281366B (en) * 1993-08-16 1996-07-31 Bridon Plc Ribbed flexible member for casting into an anchorage medium
US5791823A (en) * 1996-12-06 1998-08-11 Inco Limited Yielding head for mine support
US5882148A (en) * 1997-02-07 1999-03-16 Dm Technologies Ltd. Apparatus for yielding support of rock
US6270290B1 (en) * 1997-02-14 2001-08-07 Jennmar Corporation Tensionable cable bolt
US6074134A (en) * 1997-02-14 2000-06-13 Jennmar Corporation Tensionable cable bolt
DE29712094U1 (en) * 1997-07-09 1997-09-11 Bermüller & Co. GmbH, 90451 Nürnberg Grout anchor
AU2002953368A0 (en) * 2002-12-16 2003-01-09 Garford Pty Ltd A yielding rock bolt
US20040161316A1 (en) * 2003-02-19 2004-08-19 F.M. Locotos Co., Inc. Tubular mining bolt and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190100998A1 (en) * 2015-06-23 2019-04-04 Ncm Innovations (Pty) Ltd. Groutable rock anchor assembly
US10344593B2 (en) * 2015-06-23 2019-07-09 Ncm Innovations (Pty) Ltd. Grout delivery system
US10465515B2 (en) * 2015-06-23 2019-11-05 Ncm Innovations (Pty) Ltd. Groutable rock anchor assembly
US11215053B2 (en) * 2017-09-07 2022-01-04 Ncm Innovations (Pty) Ltd Adapted grout delivery sleeve

Also Published As

Publication number Publication date
AUPS310702A0 (en) 2002-07-11
US20060093438A1 (en) 2006-05-04
WO2004001192A1 (en) 2003-12-31
CA2490111C (en) 2012-03-13
NO20050269L (en) 2005-03-21

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EEER Examination request
MKLA Lapsed

Effective date: 20180620