EP1623093B1 - Procede et dispositif de soutenement par boulons d'ancrage - Google Patents

Procede et dispositif de soutenement par boulons d'ancrage Download PDF

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Publication number
EP1623093B1
EP1623093B1 EP04732530A EP04732530A EP1623093B1 EP 1623093 B1 EP1623093 B1 EP 1623093B1 EP 04732530 A EP04732530 A EP 04732530A EP 04732530 A EP04732530 A EP 04732530A EP 1623093 B1 EP1623093 B1 EP 1623093B1
Authority
EP
European Patent Office
Prior art keywords
tension element
bore hole
tubular bolt
medium
bolt
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.)
Expired - Lifetime
Application number
EP04732530A
Other languages
German (de)
English (en)
Other versions
EP1623093A1 (fr
Inventor
Fredrik ÖBERG
Morgan Kanflod
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.)
Epiroc Rock Drills AB
Original Assignee
Atlas Copco Rock Drills AB
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 Atlas Copco Rock Drills AB filed Critical Atlas Copco Rock Drills AB
Priority to PL04732530T priority Critical patent/PL1623093T3/pl
Priority to SI200430647T priority patent/SI1623093T1/sl
Publication of EP1623093A1 publication Critical patent/EP1623093A1/fr
Application granted granted Critical
Publication of EP1623093B1 publication Critical patent/EP1623093B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-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
    • 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
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • This invention concerns a method and a device for rock bolting according to the preambles of claims 1 and 11 respectively.
  • Pre-stressed wire bolts for rock enforcement are installed by grouting the wire bolt in a bore hole in the rock to be reinforced.
  • cement concrete or any other binding agent is used as cement.
  • the pre-tension will occur only along the part of the wire which is pulled free from the set binding agent.
  • the length of the part being pulled free from binding agent is undefined which is a problem regarding the security of the fastener.
  • pre-tension can be applied to the bolt before grouting thereof with a settable agent, which result in that the pre-tension will be well defined along a complete length of an element of the bolt and that the security of the installation is increased.
  • the channel for transmitting the said settable agent provides means which open for communication with the outside of the tension element through pressurizing to a certain pressure level
  • the same channel may be used for transmitting expansion medium and settable medium.
  • the said pressure level is set such that the channel opens at a pressure increase with a certain ⁇ -pressure above the expansion pressure.
  • the tension element is used for transmission of medium for expanding the tubular bolt, wherefore the tension element comprises a through channel for transmission of pressure water or the like.
  • the settable medium is transmitted through a channel in the tension element, wherein in particular it is preferred that it is this channel which can be opened through pressurizing to a certain pressure level which exceeds a certain predetermined threshold value.
  • the bursting plate can be an integral part of the material in the tension element, for example a drilled-out or milled-out portion having a certain remaining material thickness, which allows shearing of the material when said pressure level is reached.
  • numeral 1 generally denotes a device for rock bolting including pre-stressing a rock bolt and with a tubular expandable rock bolt, essentially of the kind which is described in US-A-4459067 (Atlas Copco AB).
  • the tubular bolt includes in general an expandable portion 5 and a fastening portion 6, into which is attachable a tubular tension element 3 including an inner portion 7 having a thread for cooperation with the fastening portion 6 and a female thread for cooperation with a tension section 8, which in turn over a joining element 9 is arranged to be threaded to one further tension section 8.
  • the parts included in the tension element 3 are standard components, which can be combined as desired, for example for adjustment to the depth of a bore hole wherein the device 1 is intended to be inserted.
  • An abutment element 4 includes an abutment plate 10 and a tension nut 11, which cooperates with an outside tension section 8, is arranged outside an insertion opening of said bore hole.
  • Fig 2 shows the device in Fig 1 in an assembled state and inserted into a bore hole 12, which is drilled in a rock structure 20.
  • the bore hole 12 provides an insertion opening 13, an outer portion 14 and an inner portion 15.
  • the outside end 29 of the outermost tension section 8 is after insertion of the device into the bore hole 12 connected to a pressure water source or the like for transmitting a pressure of as an example 300 bar to the expandable portion 5.
  • This expandable portion 5 will thereby be brought to firm anchoring against the inside of the inner portion 15 of the bore hole 12 so that already in this step a considerable anchoring of the complete rock bolt will occur.
  • the tension element consisting of the parts 7, 8 and 9 may now be pre-stressed, which is made in such a way that the abutment plate 10 is pressed against the rock face 20 around the insertion opening 13 with the aid of the tension nut 11, which is tightened to a predetermined torque value.
  • the device After pre-stressing the device is now grouted-in in order to reinforce the anchoring as well as for assistance against corrosion, by injecting a settable medium into the space 27 between the tension element and the wall of the bore hole 12.
  • this is achieved in such a way that the channel inside the tension element is pressurized with a pressure which exceeds the pressure for expanding the expandable portion 5 and which is chosen to such a level that a bursting plate 16, which is positioned in the inner part 7 of the tension element, bursts so that an open channel is formed between this channel 19 and said space 27.
  • the device is connected at its end portion 29 to a cement pump or any other source of a suitable settable medium.
  • Fig 3 shows a detail of an inner portion 7 of a tension element with a bursting plate 16, which in this case is integrated in the material of the portion 7 in such a way that a milling operation 17 has been made so that the surrounding portion 18 of the bursting plate 6 provides a material thickness that can be sheared off at a certain pressurizing level.
  • the invention can be modified within the scope of the following claims, and as an example a device for rock bolting can be used, wherein medium for expanding the tubular bolt as well as settable medium is transmitted otherwise than through the tension element, for example through separate inserted and removable element (28 in Fig 5), wherein in that case the tension element can be made homogenous.
  • the bursting plate can be a separate element inserted inside the tension element and also other means for establishing a channel for transmitting the settable medium can be used, for example an element having a valve function may be used.
  • a further example is the use of a break-pin which is sheared off at a certain pressure and fixes a potentially movable valve element.
  • the tension element as an example can be anchored in a way that is shown in Fig 6, through clamping of a tension element 29 between an expandable bolt 2 and the wall of the bore hole, wherein the tension element in that case can be formed of a wire, which then can be pre-tensioned and anchored and be secured against corrosion through injection of cement or any other binding agent according to the above.

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)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Dowels (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Control Of Metal Rolling (AREA)

Claims (19)

  1. Procédé pour boulonner dans la roche à l'aide d'un dispositif (1) de boulonnage dans la roche, dans lequel un écrou tubulaire (2) de section transversale fermée est introduit et est déployé par l'application d'un milieu de pression à sa partie intérieure pour ancrage à l'intérieur d'un trou (12) de forage, qui comporte une partie intérieure (15) et une partie extérieure (14) de même qu'une ouverture (13) d'entrée, et dans lequel l'écrou tubulaire est déployé pour entrer en contact avec la partie intérieure du trou de forage, caractérisé en ce que :
    un élément (3, 7, 8, 9) de traction qui est agencé dans la partie extérieure du trou de forage, une partie intérieure (7) étant assujettie à l'écrou tubulaire (2), est précontraint,
    un milieu pouvant durcir est injecté dans la partie extérieure du trou (14) de forage entre (27) l'élément de traction et la paroi du trou de forage et peut durcir, et
    un canal, qui est inclus dans le dispositif (1) de boulonnage dans la roche, destiné à transmettre ledit milieu pouvant durcir, est ouvert pour communication avec l'extérieur (27) de l'élément (3) de traction par l'intermédiaire d'une mise sous pression à un certain niveau de pression.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un milieu de déploiement de l'écrou tubulaire est transmis à travers un canal (19) dans l'élément (3) de traction.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que ledit milieu pouvant durcir est transmis à travers un canal à l'intérieur de l'élément (3) de traction.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé
    en ce que le canal est ouvert lorsqu'une plaque (16) d'éclatement est amenée à rompre audit niveau de pression.
  5. Procédé selon la revendication 1 ou 2, caractérisé en ce que ledit milieu pouvant durcir est transmis (30) à l'extérieur de l'élément (3) de traction.
  6. Procédé selon la revendication 5, caractérisé en ce que de l'air qui est présent à l'intérieur du trou de forage est évacué (31) par un canal réalisé dans l'élément (3) de traction lors de l'injection dudit milieu pouvant durcir.
  7. Procédé selon la revendication 1, caractérisé en ce que ledit milieu de déploiement de l'écrou tubulaire est transmis par l'intermédiaire d'un élément (28) d'installation d'écrou distinct qui est assujetti à une partie de liaison de l'écrou tubulaire (2).
  8. Procédé selon la revendication 7, caractérisé en ce que l'élément (3) de traction est assujetti à ladite partie de liaison après un déploiement de l'écrou tubulaire (2).
  9. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'élément (29) de traction est assujetti par serrage entre l'écrou tubulaire (2) et la paroi du trou de forage lors du déploiement de celui-ci.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément (3) de traction est précontraint entre l'écrou tubulaire (2) et un élément (4) de butée agencé au niveau de l'ouverture d'entrée du trou de forage.
  11. Dispositif (1) de boulonnage dans la roche, incluant un écrou tubulaire (2) ayant une section transversale fermée pour introduction et déploiement par l'application d'un milieu de pression à sa partie intérieure pour ancrage à l'intérieur d'un trou (12) de forage qui comporte une partie intérieure et une partie extérieure et une ouverture d'introduction,
    caractérisé par :
    un élément (3) de traction à agencer au niveau de la partie extérieure du trou de forage comportant une partie intérieure (7) pour assujettissement à l'écrou tubulaire,
    des moyens (10, 11) servant à précontraindre l'élément (3) de traction dans une direction longitudinale entre l'écrou tubulaire et l'ouverture d'introduction,
    un moyen destiné à transmettre un milieu pouvant durcir à la partie extérieure du trou de forage entre (27) l'élément de traction et la paroi du trou de forage, et
    un canal, qui est inclus dans le dispositif (1) de boulonnage dans la roche, destiné à transmettre ledit milieu pouvant durcir fournissant des moyens (16) qui sont ouverts pour mise en communication avec l'extérieur de l'élément de traction par une mise sous pression à un certain niveau de pression.
  12. Dispositif selon la revendication 11, caractérisé par un moyen destiné à transmettre un milieu prévu pour déployer l'écrou tubulaire (2).
  13. Dispositif selon la revendication 11 ou 12, caractérisé en ce que ledit moyen destiné à transmettre ledit milieu pouvant durcir inclut un canal dans l'élément (3) de traction.
  14. Dispositif selon l'une quelconque des revendications précédentes 11 à 13, caractérisé en ce que ledit moyen qui est ouvert est une plaque (16) d'éclatement, qui est réalisée pour rompre audit niveau de pression.
  15. Dispositif selon l'une quelconque des revendications 11 et 12, caractérisé en ce que ledit milieu pouvant durcir est agencé pour être transmis (30) à l'extérieur de l'élément (3) de traction.
  16. Dispositif selon la revendication 15, caractérisé par un canal (31) d'évacuation réalisé à l'intérieur de l'élément de traction, destiné à évacuer de l'air présent à l'intérieur du trou de forage lors de l'injection dudit milieu pouvant durcir.
  17. Dispositif selon la revendication 11 ou 12, caractérisé par un élément (28) d'installation d'écrou distinct qui peut être fixé à une partie de liaison située sur l'écrou tubulaire (2) dans le but de transmettre un milieu permettant le déploiement de l'écrou tubulaire.
  18. Dispositif selon la revendication 11, 12 ou 16, caractérisé en ce que l'élément de traction est pourvu d'un moyen prévu pour fixation à ladite partie de liaison après déploiement de l'écrou tubulaire.
  19. Dispositif selon la revendication 11 ou 12, caractérisé en ce que l'élément (29) de traction est formé de façon à être ancré par serrage entre l'écrou tubulaire et la paroi du trou de forage lors du déploiement de celui-ci.
EP04732530A 2003-05-12 2004-05-12 Procede et dispositif de soutenement par boulons d'ancrage Expired - Lifetime EP1623093B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL04732530T PL1623093T3 (pl) 2003-05-12 2004-05-12 Sposób i urządzenie do kotwienia skał
SI200430647T SI1623093T1 (sl) 2003-05-12 2004-05-12 Postopek in priprava za sidranje v skalo

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0301376A SE525765C2 (sv) 2003-05-12 2003-05-12 Förfarande och anordning för bergbultning
PCT/SE2004/000731 WO2004099569A1 (fr) 2003-05-12 2004-05-12 Procede et dispositif de soutenement par boulons d'ancrage

Publications (2)

Publication Number Publication Date
EP1623093A1 EP1623093A1 (fr) 2006-02-08
EP1623093B1 true EP1623093B1 (fr) 2008-01-09

Family

ID=20291274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04732530A Expired - Lifetime EP1623093B1 (fr) 2003-05-12 2004-05-12 Procede et dispositif de soutenement par boulons d'ancrage

Country Status (21)

Country Link
EP (1) EP1623093B1 (fr)
JP (1) JP4484869B2 (fr)
KR (1) KR101089019B1 (fr)
CN (1) CN1788139B (fr)
AT (1) ATE383496T1 (fr)
AU (1) AU2004236621B2 (fr)
BR (1) BRPI0410171B1 (fr)
CA (1) CA2523296C (fr)
DE (1) DE602004011206T2 (fr)
DK (1) DK1623093T3 (fr)
ES (1) ES2297418T3 (fr)
HR (1) HRP20080032T3 (fr)
IL (1) IL171671A (fr)
NO (1) NO20055861L (fr)
PL (1) PL1623093T3 (fr)
PT (1) PT1623093E (fr)
RU (1) RU2340775C2 (fr)
SE (1) SE525765C2 (fr)
SI (1) SI1623093T1 (fr)
WO (1) WO2004099569A1 (fr)
ZA (1) ZA200508165B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103174445B (zh) * 2013-03-25 2015-10-28 韩雪峰 一种射孔大头注浆恒阻锚杆

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326004A (en) * 1962-07-05 1967-06-20 Chester I Williams Procedure for reinforcing a rock formation
US3695045A (en) * 1970-02-03 1972-10-03 Chester I Williams Rock bolts
SE427764B (sv) * 1979-03-09 1983-05-02 Atlas Copco Ab Bergbultningsforfarande jemte rorformig bergbult
CN2065667U (zh) * 1990-05-16 1990-11-14 山东矿业学院 内注浆锚杆及注浆时配套用的逆止阀
CN2448925Y (zh) * 2000-07-24 2001-09-19 陶纪南 胀裂式压力型预应力注浆锚具

Also Published As

Publication number Publication date
DE602004011206D1 (de) 2008-02-21
AU2004236621A1 (en) 2004-11-18
JP4484869B2 (ja) 2010-06-16
CA2523296C (fr) 2012-06-26
NO20055861L (no) 2006-01-24
PT1623093E (pt) 2008-02-22
BRPI0410171B1 (pt) 2020-11-03
DE602004011206T2 (de) 2008-12-24
RU2340775C2 (ru) 2008-12-10
PL1623093T3 (pl) 2008-06-30
EP1623093A1 (fr) 2006-02-08
SE0301376L (sv) 2004-11-13
BRPI0410171A (pt) 2006-05-16
KR20060011862A (ko) 2006-02-03
CN1788139B (zh) 2012-02-01
IL171671A (en) 2010-11-30
ATE383496T1 (de) 2008-01-15
RU2005138308A (ru) 2006-04-27
SI1623093T1 (sl) 2008-06-30
DK1623093T3 (da) 2008-04-28
JP2006526091A (ja) 2006-11-16
ES2297418T3 (es) 2008-05-01
ZA200508165B (en) 2007-04-25
CN1788139A (zh) 2006-06-14
CA2523296A1 (fr) 2004-11-18
WO2004099569A1 (fr) 2004-11-18
HRP20080032T3 (en) 2008-02-29
AU2004236621B2 (en) 2009-07-23
SE0301376D0 (sv) 2003-05-12
SE525765C2 (sv) 2005-04-19
KR101089019B1 (ko) 2011-12-01

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