NZ535955A - A rock bolt - Google Patents

A rock bolt

Info

Publication number
NZ535955A
NZ535955A NZ535955A NZ53595503A NZ535955A NZ 535955 A NZ535955 A NZ 535955A NZ 535955 A NZ535955 A NZ 535955A NZ 53595503 A NZ53595503 A NZ 53595503A NZ 535955 A NZ535955 A NZ 535955A
Authority
NZ
New Zealand
Prior art keywords
rock bolt
torque
deformable protrusion
limiting means
application apparatus
Prior art date
Application number
NZ535955A
Inventor
Peter Frank Reinhold Altounyan
Original Assignee
Rock Mechanics Technology Ltd
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 Rock Mechanics Technology Ltd filed Critical Rock Mechanics Technology Ltd
Publication of NZ535955A publication Critical patent/NZ535955A/en

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
    • E21D21/008—Anchoring or tensioning means
    • 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
    • E21D20/025—Grouting with organic components, e.g. resin
    • 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
    • E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension

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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

A rock bolt (1) comprising an elongate body having torque limiting means at an outer end (3) of the body, the torque limiting means having at least one deformable protrusion (2) that deforms under a predetermined torque. There is provided for the deformation of the deformable protrusion (2) to prevent further rotation of the rock bolt (1) by a torque application apparatus. A further feature of the invention provides for the deformable protrusion (2) to be shaped to receive a complementary shaped chuck on a torque application apparatus to facilitate transferring torque to the rock bolt (1). Further features of the invention provide for the deformable protrusion to be protrusions extending in an axial direction from an end surface of the rock bolt (1).
NZ535955A 2002-04-12 2003-04-14 A rock bolt NZ535955A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200110206 2002-04-12
PCT/ZA2003/000050 WO2003087538A1 (en) 2002-04-12 2003-04-14 A rock bolt

Publications (1)

Publication Number Publication Date
NZ535955A true NZ535955A (en) 2006-04-28

Family

ID=34104957

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ535955A NZ535955A (en) 2002-04-12 2003-04-14 A rock bolt

Country Status (4)

Country Link
AU (1) AU2003262192B2 (en)
NZ (1) NZ535955A (en)
WO (1) WO2003087538A1 (en)
ZA (1) ZA200408149B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007028267B4 (en) * 2007-06-15 2011-04-28 Firep Rebar Technology Gmbh Improved anchor nut made of fiber-reinforced plastic

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726098A1 (en) * 1987-08-06 1989-02-16 Dyckerhoff & Widmann Ag ANCHORING DEVICE FOR THE TIE LINK OF AN ANCHOR, ESPECIALLY A ROCK ANCHOR
US5282698A (en) * 1992-06-03 1994-02-01 The Eastern Company Threaded fastener, method of fabrication thereof and method of supporting a mine roof using such a fastener
CA2142894A1 (en) * 1993-06-28 1995-01-05 Jeffrey Robert Ferguson Improvements in rock bolts
US5873689A (en) * 1997-07-03 1999-02-23 Milad Mansour Low torque threaded fastener and mine roof support system using such a fastener

Also Published As

Publication number Publication date
AU2003262192A1 (en) 2003-10-27
ZA200408149B (en) 2005-12-28
AU2003262192B2 (en) 2008-03-06
WO2003087538A1 (en) 2003-10-23

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Legal Events

Date Code Title Description
PSEA Patent sealed
RENW Renewal (renewal fees accepted)
RENW Renewal (renewal fees accepted)
RENW Renewal (renewal fees accepted)

Free format text: PATENT RENEWED FOR 3 YEARS UNTIL 14 APR 2016 BY DENNEMEYER SA

Effective date: 20130208

LAPS Patent lapsed