EP3966429B1 - Aufblasbarer gebirgsanker - Google Patents

Aufblasbarer gebirgsanker Download PDF

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Publication number
EP3966429B1
EP3966429B1 EP20801528.9A EP20801528A EP3966429B1 EP 3966429 B1 EP3966429 B1 EP 3966429B1 EP 20801528 A EP20801528 A EP 20801528A EP 3966429 B1 EP3966429 B1 EP 3966429B1
Authority
EP
European Patent Office
Prior art keywords
fold
rock bolt
cap
pipe
end wall
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.)
Active
Application number
EP20801528.9A
Other languages
English (en)
French (fr)
Other versions
EP3966429C0 (de
EP3966429A1 (de
EP3966429A4 (de
Inventor
Barry Graeme Holfeld
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.)
Individual
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 EP3966429A1 publication Critical patent/EP3966429A1/de
Publication of EP3966429A4 publication Critical patent/EP3966429A4/de
Application granted granted Critical
Publication of EP3966429C0 publication Critical patent/EP3966429C0/de
Publication of EP3966429B1 publication Critical patent/EP3966429B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing 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
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • WO2017025933 A1 discloses an inflatable rock bolt according to the preamble of claim 1 and a method of making an inflatable rock bolt according to the preamble of claim 7.
  • an inflatable rock bolt comprising:
  • the invention provides for the second portion of the end wall to be arranged at a forward region of the fold with the first portion of the end wall in an oppositely disposed position at a front of the rock bolt.
  • the cap (2) is fabricated from a suitably ductile metal and has a sidewall or skirt (5) that extends from a rim (not shown) of the cap (2) to a closed end (6).
  • the sidewall (5) extends forwardly from the pipe (3) with a slight inward taper.
  • the closed end of the cap (2) in this embodiment is substantially flat and provides an end wall (7) to the front of the sidewall (5).
  • the end wall (7) transitions substantially uniformly through a curve at an annular outer region from the sidewall (5) and into a central region of the closed end (6) which is, in this embodiment, substantially flattened (relative to the transition curve).
  • a fold was formed to extend through the cap and past its closed end to reduce the profile of the cap in line with the forming process to which the length of pipe was subjected.
  • the forces exerted by the tool in the first forming step are such that when the fold (9) is formed, the outer surface of the pipe (3) and cap (2) assembly is no longer generally of circular form.
  • the rock bolt (1) in intermediate form is then subjected to a second step of the forming process. This operation involves placing the rock bolt (1) into a second die set which includes upper and lower dies that together define an elongate die cavity of circular cross-section and which locates over the pipe (3) and the cap (2).
  • the second die set is closed using hydraulic pressure with the intermediate condition rock bolt in the die cavity.
  • a rock bolt is formed with a body that, except for the fold (9), has a substantially circular axial profile.
  • This configuration of the finished product (post-formed rock bolt) is suited for insertion into a round drill hole and presents further capacity for expansion over the intermediate form.
  • the rock bolt is inserted into a drill hole and expanded from a formed, folded condition towards a pre-formed condition, wherein the fully pre-formed condition represents a (substantially) maximal expansion which is in excess of that required for the rock bolt to engage in the drill hole.
  • the wall of the drill hole is usually engaged with the rock bolt resembling the intermediate condition shown as "B" in Figures 1 , 2 and 3 . In situ conditions and the particular embodiment of the rock bolt used will determine the form that the expanded rock bolt takes.
  • the configuration of the cap formed in the manner illustrated and described serves to provide a configuration that involves folded regions of material that afford improved durability to the stress placed on the material in those regions during expansion of the rock bolt.

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)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Pipe Accessories (AREA)
  • Piles And Underground Anchors (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Claims (9)

  1. Aufblasbarer Felsanker, umfassend:
    ein Rohr mit einer Kappe, die in einem vorgeformten Zustand dichtend an einem Ende des Rohrs angeschweißt ist;
    wobei die Kappe eine Seitenwand aufweist, die sich von einem Rand der Kappe bis zu einem geschlossenen Ende erstreckt, das durch eine Endwand der Kappe bereitgestellt wird;
    wobei der Felsanker mit einer Falte bereitgestellt ist, die von einer ersten Seite des Felsankers gebildet ist und sich entlang einer Länge des Rohrs erstreckt; und
    einen Boden der Falte, der neben einer gegenüberliegenden zweiten Seite des Felsankers angeordnet ist, wo er sich entlang der Rohrlänge erstreckt;
    dadurch gekennzeichnet, dass
    der Boden der Falte sich vom Rohr in die Seitenwand der Kappe und nach außen zur ersten Seite des Felsankers bis zu einer Position erstreckt, die durch einen Steg von einem ersten Abschnitt der Endwand getrennt ist, die außerhalb der Falte bleibt, wobei ein zweiter Abschnitt der Endwand in die Falte hineingezogen wird; und
    der Steg sich von einer Vorderseite des Felsankers als ein im Wesentlichen U-förmiger Steg erstreckt, der um die Falte an der Kappe des Felsankers geformt ist, wobei eine Kante des Stegs auf der ersten Seite relativ zu einer Achse des Rohrs angeordnet ist, wie sie in einem vorgeformten Zustand des Rohrs vorliegt.
  2. Felsanker nach Anspruch 1, bei dem der zweite Abschnitt der Endwand an einem vorderen Bereich der Falte angeordnet ist, wobei der erste Abschnitt der Endwand in einer gegenüberliegenden Position an einer Vorderseite des Felsankers angeordnet ist.
  3. Felsanker nach Anspruch 1, bei dem das geschlossene Ende der Kappe entlang der Falte nach außen gedrückt wird, wo es in einen vordersten Abschnitt des U-förmigen Stegs geformt wird.
  4. Felsanker nach Anspruch 1, bei dem die Endwand der Kappe von der Seitenwand gleichmäßig durch eine Kurve zum geschlossenen Ende der Kappe übergeht, die im Wesentlichen flach ist.
  5. Felsanker nach Anspruch 1, bei dem die Seitenwand der Kappe einen im Wesentlichen zylindrischen Bereich am Rand umfasst, der mit einer Presspassung in das vorgeformte Rohr eingreift.
  6. Felsanker nach Anspruch 1, bei dem ein größerer Abschnitt der Endwand der Kappe im Wesentlichen in einem vorgeformten Zustand als der erste Abschnitt gehalten werden soll, wobei ein benachbarter kleinerer Abschnitt als der zweite Abschnitt nach hinten gebogen und in Richtung der Falte gedrückt wird.
  7. Verfahren zur Herstellung eines aufblasbaren Felsankers, das die folgenden Schritte umfasst:
    Bereitstellen einer vorgeformten Rohrlänge mit mindestens einem offenen Ende,
    Anschweißen einer Kappe an das offene Ende, und
    anschließendes Verformen des Rohrs und der Kappe in eine gefaltete Form, um eine Falte bereitzustellen, die sich entlang des Rohrs erstreckt,
    dadurch gekennzeichnet, dass die Falte durch ein Werkzeug gebildet wird, dessen Arbeitskante ausreichend kurz vor einer Endwand an einem geschlossenen Ende der Kappe endet, um:
    - einen ersten Abschnitt der Endwand, der mit der Falte auf einer Außenseite der Falte ausgerichtet ist, aufrechtzuerhalten; und
    - einen zweiten Abschnitt der Endwand in einer Kurve nach hinten in Richtung und in die Falte zu ziehen
    - wobei die Falte geformt ist, um einen im Wesentlichen U-förmigen Steg bereitzustellen, der sich von einer Vorderseite des Felsankers um die Falte an der Kappe herum erstreckt, wobei eine Kante des Stegs auf einer Seite einer Achse des Rohrs angeordnet ist, wie sie in einem vorgeformten Zustand des Rohrs vorliegt.
  8. Verfahren nach Anspruch 7, bei dem die Falte mit dem ersten Abschnitt als größeren Abschnitt der Endwand und dem zweiten Teil als kleineren Teil der Endwand geformt wird.
  9. Verfahren nach Anspruch 7, bei dem der Felsanker in einem zweiten Umformprozess um die Falte herum zugedrückt wird.
EP20801528.9A 2019-05-06 2020-05-06 Aufblasbarer gebirgsanker Active EP3966429B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA201902816 2019-05-06
PCT/IB2020/054269 WO2020225735A1 (en) 2019-05-06 2020-05-06 An inflatable rock bolt

Publications (4)

Publication Number Publication Date
EP3966429A1 EP3966429A1 (de) 2022-03-16
EP3966429A4 EP3966429A4 (de) 2023-01-11
EP3966429C0 EP3966429C0 (de) 2024-07-03
EP3966429B1 true EP3966429B1 (de) 2024-07-03

Family

ID=73051082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20801528.9A Active EP3966429B1 (de) 2019-05-06 2020-05-06 Aufblasbarer gebirgsanker

Country Status (7)

Country Link
EP (1) EP3966429B1 (de)
CN (1) CN114174634B (de)
AU (1) AU2020268963A1 (de)
CA (1) CA3166654A1 (de)
ES (1) ES2987820T3 (de)
WO (1) WO2020225735A1 (de)
ZA (1) ZA202109985B (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004085A1 (en) * 1988-10-10 1990-04-19 Witzand Hendrik Hermanus Gerha Rock stabilizer
DE19534365A1 (de) * 1995-09-15 1997-03-20 Fischer Artur Werke Gmbh Spreizdübel
JP4680491B2 (ja) * 2003-11-17 2011-05-11 日新製鋼株式会社 鋼管膨張型ロックボルト
US9062547B2 (en) * 2010-06-04 2015-06-23 Fci Holdings Delaware, Inc. Expandable bolt with shielded tip
SE535912C2 (sv) * 2011-06-30 2013-02-12 Leif Eriksson Expanderbar bergbult och ett förfarande för tillverkning av en bergbult
JP6053116B2 (ja) * 2012-09-11 2016-12-27 株式会社ケー・エフ・シー 膨張用異型鋼管及びその製造方法
US9832088B2 (en) 2014-09-30 2017-11-28 Microsoft Technology Licensing, Llc Monitoring of shared server set power supply units
CN104332217B (zh) 2014-10-08 2018-04-10 广州方邦电子股份有限公司 自由接地膜及其制作方法、包含自由接地膜的屏蔽线路板及接地方法
WO2017025933A1 (en) * 2015-08-12 2017-02-16 Barry Graeme Holfeld An inflatable rock bolt

Also Published As

Publication number Publication date
CN114174634B (zh) 2025-06-17
CN114174634A (zh) 2022-03-11
EP3966429C0 (de) 2024-07-03
CA3166654A1 (en) 2021-11-12
WO2020225735A1 (en) 2020-11-12
AU2020268963A1 (en) 2022-01-06
EP3966429A1 (de) 2022-03-16
ZA202109985B (en) 2022-09-28
EP3966429A4 (de) 2023-01-11
ES2987820T3 (es) 2024-11-18

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