CA2653307A1 - Improved rock bolt with ploughing anchors - Google Patents

Improved rock bolt with ploughing anchors Download PDF

Info

Publication number
CA2653307A1
CA2653307A1 CA2653307A CA2653307A CA2653307A1 CA 2653307 A1 CA2653307 A1 CA 2653307A1 CA 2653307 A CA2653307 A CA 2653307A CA 2653307 A CA2653307 A CA 2653307A CA 2653307 A1 CA2653307 A1 CA 2653307A1
Authority
CA
Canada
Prior art keywords
stem
borehole
anchors
grout
anchor
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
CA2653307A
Other languages
French (fr)
Other versions
CA2653307C (en
Inventor
Charlie Chunlin Li
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.)
Normet International Ltd
Original Assignee
Dynamic Rock Support AS
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 Dynamic Rock Support AS filed Critical Dynamic Rock Support AS
Publication of CA2653307A1 publication Critical patent/CA2653307A1/en
Application granted granted Critical
Publication of CA2653307C publication Critical patent/CA2653307C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • 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

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

A rock bolt for being grouted to set in grout (g) in a borehole in a rock, said bolt comprising - an elongate massive stem (1) with a surface anchor (3); - said stem (1) comprising two or more extensive lengths of stem portions (1a, 1b, ..., 1i), - each stem portion followed by a borehole anchor (2a, 2b, ..., 2i) for setting in said grout (g), said borehole anchors distributed with separations (La, Lb, ..., Li) along the length of said stem (1); - said stem portions (1a, 1b, ..., 1i) arranged for slipping relative to said grout of said borehole, so as for each of said stem portions (1a, 1b, ..., 1i) to constrain local rock deformation through elongation of said stem portions between pairs of a locally anchored preceding anchor (3, 2a, 2b, ...) and a consecutive anchor (2a, 2b, 2c, ..., 2i); characterized in that - one or more of said borehole anchors (2a, 2b, 2c, ..., 2i) being arranged for having a bearing capacity in said grout (g) being less than a failure strength of an adjacent stem portion ((1a or 1b), (1b or 1c), ... (1i), to enable one or more of said borehole anchors (2a, 2b, ..., 2i) to move during rock deformation so as for redistributing strain between stem portions (1a, 1b, ..., 1i).

Claims
CA2653307A 2008-12-23 2009-02-09 Improved rock bolt with ploughing anchors Active CA2653307C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NONO20085384 2008-12-23
NO20085384A NO332912B1 (en) 2008-12-23 2008-12-23 Improved rock bolt with plowing anchors

Publications (2)

Publication Number Publication Date
CA2653307A1 true CA2653307A1 (en) 2010-06-23
CA2653307C CA2653307C (en) 2012-05-01

Family

ID=42101537

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2653307A Active CA2653307C (en) 2008-12-23 2009-02-09 Improved rock bolt with ploughing anchors

Country Status (4)

Country Link
CA (1) CA2653307C (en)
CL (1) CL2011001581A1 (en)
NO (1) NO332912B1 (en)
WO (1) WO2010074584A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111911209A (en) * 2020-08-17 2020-11-10 河北工程大学 Accurate targeted anchor grouting control method suitable for deep soft rock roadway

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CL2014001002A1 (en) * 2013-12-12 2014-11-28 Ncm Innovations Pty Ltd Rock anchor bolt including an elongated cylindrical body having, a first distal end and a second opposite proximal end, a threaded portion at the second end, a first anchor located at or at least partially located at a first end portion of the body, a second anchor, a first stem portion between the first and second anchor.
CN105928649B (en) * 2016-04-15 2018-11-02 长江水利委员会长江科学院 Buried high energy storage rock mass stress release time lag characteristic measurement system and method
US10858937B2 (en) 2017-07-26 2020-12-08 Epiroc Drilling Tools Ab Adapted rock bolt with improved installation properties
CN110219687B (en) * 2019-06-21 2020-08-21 安徽理工大学 Method for monitoring stress distribution of full-length anchoring bolt body

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3326428A1 (en) * 1983-07-22 1985-02-07 HLS-Verwaltung GmbH, 4630 Bochum Sliding anchor
DE3504543C1 (en) 1985-02-11 1986-05-15 Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum Resin-bedded roof bolt
US5511909A (en) * 1994-06-07 1996-04-30 Jennmar Corporation Cable bolt and method of use in supporting a rock formation
CA2317981A1 (en) * 1999-09-14 2001-03-14 Jennmar Corporation Grit surface cable products
WO2007000461A1 (en) 2005-06-27 2007-01-04 Etilux S.A. Unit comprising a metallic support and an emitter-receiver device
SE532203C2 (en) * 2006-12-22 2009-11-10 Dynamic Rock Support As A deformable rock bolt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111911209A (en) * 2020-08-17 2020-11-10 河北工程大学 Accurate targeted anchor grouting control method suitable for deep soft rock roadway
CN111911209B (en) * 2020-08-17 2022-02-08 河北工程大学 Accurate targeted anchor grouting control method suitable for deep soft rock roadway

Also Published As

Publication number Publication date
WO2010074584A1 (en) 2010-07-01
NO20085384L (en) 2010-06-24
CA2653307C (en) 2012-05-01
NO332912B1 (en) 2013-01-28
CL2011001581A1 (en) 2012-05-11

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Legal Events

Date Code Title Description
EEER Examination request