WO2016127188A2 - Ensemble câble pouvant être tendu et procédé de mise en tension de celui-ci - Google Patents

Ensemble câble pouvant être tendu et procédé de mise en tension de celui-ci Download PDF

Info

Publication number
WO2016127188A2
WO2016127188A2 PCT/ZA2015/000069 ZA2015000069W WO2016127188A2 WO 2016127188 A2 WO2016127188 A2 WO 2016127188A2 ZA 2015000069 W ZA2015000069 W ZA 2015000069W WO 2016127188 A2 WO2016127188 A2 WO 2016127188A2
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
nut
proximal end
threaded
cable
Prior art date
Application number
PCT/ZA2015/000069
Other languages
English (en)
Other versions
WO2016127188A3 (fr
Inventor
Rual ABRUE
Original Assignee
Ncm Innovations (Pty) 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 Ncm Innovations (Pty) Ltd filed Critical Ncm Innovations (Pty) Ltd
Publication of WO2016127188A2 publication Critical patent/WO2016127188A2/fr
Publication of WO2016127188A3 publication Critical patent/WO2016127188A3/fr
Priority to ZA2017/05166A priority Critical patent/ZA201705166B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Definitions

  • the invention relates to a tenslonable cable anchor and a method of tensioning same.
  • Tensioning a cable anchor typically involves attaching, to the protruding end section, a barrel and wedge assembly and then applying a tensioning force to this end section, to place the cable anchor in prehension. A wedge then engages with the barrel, forced against a faceplate, to hold the anchor in pre-tensioh.
  • This tensioning force is applied by a hydraulic tensioner, which is a heavy piece of equipment to elevate to the protruding section.
  • Cropping of the end section then takes place to remove most of the protruding end section of the bolt, to prevent this part of th cable anchor from getting in the way,
  • a tensionable cable holt system which includes: a bolt which has an elongate cabled body which extends between a distal end and an opposed proximal end, which has a threaded section towards the proximal end and which includes a mechanical anchor positioned on the body towards the distal end; and a nut which has a tubular body having a first end and a second end, a threaded bore which extends axialiy at least partially through the body and which is open at the first end, and which has, on the outer surface of the body, an abutment surface which projects transversely from th body, and between the second end and the surface, the outer surface is adapted to mate with a chuck of a bolting machine.
  • the threaded end section may be rolled directly onto the outer surface of the body.
  • the bolt may include an outwardly threaded cyl nder which is engaged over the body, towards the proximal end.
  • the invention extends to a method of tensioning ' a cable bolt which includes the steps of :
  • the hut may haye an elongate tubular body which is dimensioned to pass within the rock hole to engage the proximal end of the bolt.
  • the method includes the additional step, before step (b), of Inserting the nut into the rock hole to engage the threaded proximal end section of the bolt when the proximal end is recessed within the rock hole.
  • Figure 1 illustrates a longitudinal section through a rock hole to show a rock anchor, in accordance with the invention, located within the body;
  • Figure 2 illustrates an exploded view of a first embodiment of a rock bolt system in accordance with the invention in partial longitudinal section;
  • Figure 3 illustrates an exploded view of a second embodiment of a rock bolt system In accordance with the invention in partial longitudinal section;
  • Figure 4 illustrates an exploded view of a third embodiment of a rock bolt system in accordance with the invention in partial ' longitudinal -section;
  • Figures 5 and 8 illustrate a firs! and second step respectively of a method of pre- tenstoning a rock anchor within a rock hole.
  • a tensionable cable bait assembly 10 which accords with the invention, is Illustrated in the accompanying drawings and includes a cabie bolt 12 which is adapted for insertion into a pre-dnlled bore hole 14 of a hanging wall 15 of a mine excavation, and a tensioning tube nut 18.
  • the cable bolt 12 has an elongate flexible cable body of Intertwined steel strands, with a distal end 18 and an opposed proximal end 20,
  • the bolt 12 includes a mechanical anchor 22 positioned on a distal end portion 24 of the body. Towards the ⁇ roximal end, a proximal end portion 26 is externally threaded.
  • the threads can be formed directly onto the body. Alternatively, the threads can be formed on an exterior of a cylindrical sleeve 25 (see Figure 3) having an internal bore which Is sized to receive the cable and which is then swaged onto the proximal end portion of the body to apply the sleeve permanentl to the cable body,
  • the mechanical anchor 22 is of typical construction, including an expansion shell 28 and a plug 30 partially located within the shell, OiSJ
  • the tube nut 16A has a tubular body 32 and a bore 34 of which passes axia!y, through the body.
  • the bore is comp!imentarily internally threaded to threadedly engage, In use, the threads of the threaded end portion 26 of the cable body.
  • the tube nut 18A has an open first end 38, which leads into the bore, and an opposed second end 37. In the tube nut 16A embodiment, this end is also open creating a bore that passes throug the . ' tubular body 32. In a second embodiment, illustrated in Figure 4, the second end 37 of the tube nut 168 is closed at the second end 37, creating a bore that has a blind end .
  • the body externally, towards the second end 37, the body has a hex shaped drive head 38 (best illustrated in Figure 1 , 5 and 6) to complement the hex shaped chuck of a bolting machine.
  • a bearing plate abutting flange 40 is integrally formed.
  • fO022J In use, the cabie bolt 12 is inserted into the bore hole 14, distal end 18 leading. The bore hole is re-driiled to sufficient depth to ensure that the proximal end 20 is just within, flush with, or protruding from a mouth 42 of the hole in low profile (the positioning of the proximal end is illustrated in Figure 5).
  • Low profile means that the leading end of the bolt does not project from the mouth of the bore hol to any significant extent
  • a chuck of a bolting machine (not shown) is then engaged with hex-shaped drive head 38 and actuated to spin the tube nut 18 along the threads of the threaded portion 28 to advance towards the distal end 18, until the face plate 44 comes into contact with the hanging wall 15 face as illustrated in Figure 6.
  • the nut Viifilf With a blind end, the nut Viifilf be prevented from accommodating complete passage of the cable bolt if the bore hole is of Insufficient depth. This is because the proximal end 20 of the cable will infernally abut this blind end, before the nut has been able to travel along the cable to bear against the bearing plate In supportive abutment with the rock face. Thi limitation can provide a obvious cue that the cable anchor is not properly installed within the borehole.

Abstract

L'invention concerne un système de boulon de câble pouvant être tendu qui comprend un boulon qui possède un corps câblé allongé qui s'étend entre une extrémité distale et une extrémité proximale opposées, qui comporte une section filetée vers l'extrémité proximale et qui comprend un élément d'ancrage mécanique positionné sur le corps vers l'extrémité distale ; et un écrou qui a un corps tubulaire ayant une première extrémité et une seconde extrémité, un trou fileté qui s'étend axialement au moins partiellement dans le corps et qui est ouvert au niveau de la première extrémité, et qui comporte, sur la surface extérieure du corps, une surface de butée qui fait saillie transversalement depuis le corps, et entre la seconde extrémité et la surface de butée, la surface extérieure est conçue pour entrer en prise avec un moyen rotatif pour faire tourner l'écrou afin de mettre l'écrou en prise avec la section filetée du boulon.
PCT/ZA2015/000069 2015-02-02 2015-12-02 Ensemble câble pouvant être tendu et procédé de mise en tension de celui-ci WO2016127188A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2017/05166A ZA201705166B (en) 2015-02-02 2017-07-31 Tensionable cable assembly and method of tensioning same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2015/00733 2015-02-02
ZA201500733 2015-02-02

Publications (2)

Publication Number Publication Date
WO2016127188A2 true WO2016127188A2 (fr) 2016-08-11
WO2016127188A3 WO2016127188A3 (fr) 2016-11-10

Family

ID=56404322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ZA2015/000069 WO2016127188A2 (fr) 2015-02-02 2015-12-02 Ensemble câble pouvant être tendu et procédé de mise en tension de celui-ci

Country Status (4)

Country Link
CL (1) CL2017001963A1 (fr)
PE (1) PE20171506A1 (fr)
WO (1) WO2016127188A2 (fr)
ZA (1) ZA201705166B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114281117A (zh) * 2022-03-04 2022-04-05 交通运输部天津水运工程科学研究所 一种系泊试验用可精细调控缆绳初张力的锚固装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA747649A (en) * 1966-12-06 H. Long Wallace Flexible roof bolt
US3077809A (en) * 1958-05-28 1963-02-19 British Ropes Ltd Roof bolt with a flexible tension member and cup-shaped expansible securing means
US5570976A (en) * 1991-07-26 1996-11-05 J.J.P. Geotechnical Engineering Pty. Ltd. Cable bolt
US5375946A (en) * 1992-02-06 1994-12-27 F. M. Locotos Equipment & Design Co. Mine roof support apparatus and method
US5531545A (en) * 1995-05-11 1996-07-02 Seegmiller; Ben L. Cable bolt structure and method
US6056482A (en) * 1996-01-11 2000-05-02 Jennmar Corporation Cable bolt head
CA2317981A1 (fr) * 1999-09-14 2001-03-14 Jennmar Corporation Produits pour cables a surface granuleuse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114281117A (zh) * 2022-03-04 2022-04-05 交通运输部天津水运工程科学研究所 一种系泊试验用可精细调控缆绳初张力的锚固装置及方法

Also Published As

Publication number Publication date
WO2016127188A3 (fr) 2016-11-10
ZA201705166B (en) 2019-06-26
CL2017001963A1 (es) 2018-02-16
PE20171506A1 (es) 2017-10-20

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