EP3673151B1 - Boulon d'ancrage avec adaptateur d'engrènement - Google Patents

Boulon d'ancrage avec adaptateur d'engrènement Download PDF

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Publication number
EP3673151B1
EP3673151B1 EP18762039.8A EP18762039A EP3673151B1 EP 3673151 B1 EP3673151 B1 EP 3673151B1 EP 18762039 A EP18762039 A EP 18762039A EP 3673151 B1 EP3673151 B1 EP 3673151B1
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EP
European Patent Office
Prior art keywords
rock
meshing
rock bolt
nut
extension
Prior art date
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Application number
EP18762039.8A
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German (de)
English (en)
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EP3673151C0 (fr
EP3673151A1 (fr
Inventor
Mieczyslaw Rataj
Bradley DARLINGTON
Peter Young
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Sandvik Intellectual Property AB
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Sandvik Intellectual Property AB
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Priority claimed from AU2017903382A external-priority patent/AU2017903382A0/en
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of EP3673151A1 publication Critical patent/EP3673151A1/fr
Application granted granted Critical
Publication of EP3673151B1 publication Critical patent/EP3673151B1/fr
Publication of EP3673151C0 publication Critical patent/EP3673151C0/fr
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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
    • E21D21/008—Anchoring or tensioning means

Definitions

  • the present invention relates to a rock bolt and a wire meshing assembly for installation of meshing sheet against a surface of rock strata and in particular although not exclusively to a rock bolt and assembly for the mounting of meshing sheets in overlapping configuration at the rock surface.
  • Roof and wall support is vital in underground mining and tunnelling operations.
  • Mine and tunnel walls and roofs often consist of rock strata which require reinforcement to prevent failure, such as fragmentation or collapse.
  • Rock bolts and wire meshing are used widely for reinforcement purposes and containment purposes respectively.
  • Rock bolts are driven into the rock strata and provide reinforcement against major rock fracture, while wire mesh sheets are fixed across the rock surface and are used principally to contain smaller fragments of rock from dislodging and/or falling away from the rock surface.
  • Rock bolts are installed in a bore which is drilled into the rock strata and the rock bolt is usually secured in the bore by a resin or a cement grout, or they can be frictionally fixed within the bore.
  • the trailing end of a rock bolt normally projects a short distance outside of the bore for supporting ancillary fixtures such as rock plates and mining services, pipes and cables for example.
  • the projecting end of the rock bolt can be threaded for connection of ancillary fixtures.
  • wire meshing it is convenient for the meshing to be secured against the rock surface by attachment to the projecting end of the rock bolt.
  • the rock bolts are installed through the meshing and the rock plate bears against the meshing to fix the meshing against the rock surface.
  • the intention is for the meshing to be installed as close as possible to the rock surface.
  • new meshing must be installed in overlapping arrangement with the edges of the existing or already installed meshing.
  • the new meshing may be fixed to the last rock bolts that secure the existing meshing, or additional rock bolts need to be installed.
  • Australian Patent No 2004100042 relates to the installation of wire meshing, utilising rock bolts for anchoring the meshing and discloses an overlapping arrangement of wire meshing using a single rock bolt.
  • the first or initial meshing is secured against the rock surface via the projecting end of the rock bolt and a rock plate, while the second meshing is secured overlapping the first meshing via a meshing plate and a nut that threads onto the projecting end of the rock bolt.
  • some kinds of rock bolts have blind nuts applied to their projecting end and so a threaded section of the rock bolt does not project for attachment of a meshing plate and nut.
  • the first section of wire meshing can be installed as described above to the projecting end of the rock bolt, with the rock plate in bearing engagement, however the second section of wire meshing cannot be installed.
  • the blind nuts have an external thread for attachment of an adapter, the thread is usually relatively short and so does not provide sufficient thread for attachment of wire meshing and a meshing plate, particularly if the rock bolt is installed in a "valley" in the rock surface.
  • International PCT Patent Application No 2012053965 discloses a rock bolt that includes an adapter for hanging mining services such as pipes and cables.
  • the rock bolt of International PCT Patent Application No 2012053965 has a blind nut of the kind described above that is externally threaded for attachment of a hanger.
  • the hanger provides a point for hanging pipes and cables and the short threaded connection that the hanger makes with the blind nut is sufficient for the hanger to support these types of mining services, but would not be sufficient for supporting wire meshing.
  • US Patent Application 2017067340 discloses a similar arrangement to that disclosed in International PCT Patent Application No 2012053965 , in that an adapter for attaching a safety line for an assembly worker is provided.
  • Other exemplary rock bolts are found in US2009/074517 and WO2017/136880 .
  • rock bolt and insulation assembly configured for the secure mounting of containment meshing at highly contoured or uneven surfaces of rock strata that include troughs, cavities, valleys and the like.
  • a rock bolt and meshing installation assembly having an adapter connectable to an exposed trailing end of a rock bolt with the adapter configured to mount a meshing plate to bear against and urge a further second section of meshing sheet in overlapping contact against a first meshing sheet section already mounted at the rock surface via the rock bolt.
  • the adapter is advantageous to provide an axial extension of the trailing end of the rock bolt where the rock bolt does not protrude a sufficient axial length to receive and mount a meshing plate (to bear against the second or further section of meshing sheet).
  • a rock bolt according to the present invention advantageously facilitates attachment of the second section of wire meshing overlapping the first section via a single (common) rock bolt which saves time, cost and effort.
  • the present invention can be employed with any type rock bolt that has an end that protrudes from a bore.
  • the present invention can be used with resin or cement grouted bolts and mechanical friction bolts.
  • Resin or cement grouted rock bolts normally comprise a bar that is installed in a bore and a resin or grout is injected or otherwise introduced into the bore about the bar for the purpose of anchoring the bar in the bore.
  • Mechanical friction bolts usually comprise an outer tube that is split longitudinally to allow radial expansion and contraction of the diameter of the tube and an expander mechanism within the tube that can be activated once the rock bolt is inserted into a bore to apply a load tending to cause the tube to radially expand in order to increase the frictional engagement between the tube and the bore wall or surface.
  • rock bolt comprising a an 'elongate shaft' encompass the rock bolt having an elongate bar, rod or cable to which tension is capable of being applied during anchorage of the rock bolt into the as-formed bore.
  • the present invention encompasses the present adapter being connectable directly or indirectly to the trailing end of the elongate shaft.
  • an end of the bolt will protrude from the bore for the purpose of for example, supporting a rock plate and other mining services as might be required, such as pipes and cables.
  • the protruding end will sometimes be threaded for connection of a nut or the like as required to secure a rock plate or other mining services.
  • Australian Patent No 2004100042 shows a resin or grouted bolt in which the protruding end supports a nut for securing a rock plate and a further nut for securing a meshing plate.
  • the present invention could be applied to Australian Patent No 2004100042 by applying an adapter of the invention to the protruding end of the rock bolt in circumstances where the protruding end does not protrude sufficiently for the nut that secures the meshing plate to be attached.
  • International PCT Patent Application No 2012053965 discloses a rock bolt that has a blind nut secured to one end. Because the nut is blind, there is not sufficient room for a meshing plate and nut to be applied to the rock bolt. Accordingly, the present invention could be applied to a rock bolt of the type described in International PCT Patent Application No 2012053965 in which the nut is configured with an external thread and applying an adapter of the invention to the nut. The adapter then provides the necessary extension for attachment of a meshing plate and nut.
  • the present invention thus can be applied to various forms of rock bolt and includes cable bolts as well.
  • This form of rock bolt can be seen in Australian Patent No 2013203198 and as with the other rock bolts discussed above, also includes a protruding end for the attachment of a meshing plate and nut, or where the protruding end is not sufficient, for the attachment of an adapter of the invention. It follows that the present invention is applicable to many forms of rock bolt subject to the bolt having a protruding end to which the adapter of the invention can be applied.
  • a rock bolt for installation within a bore formed in rock strata according to claim 1.
  • the extension is elongate having a length greater than a width and projecting axially rearward from the first portion.
  • the extension may be formed as a bar or rod.
  • the bar or rod may be threaded fully or partially along its length.
  • the elongate extension comprises a second portion connectable with a connecting region of the meshing plate.
  • the second portion comprises threads provided at the elongate extension. Threaded connection is advantageous for convenience and speed of connection utilising existing tools such as a spanner, wrench or other rotatable driving device.
  • the rock bolt further comprises a nut applied to the threaded end and the nut having a threaded outside surface and the adapter being threadably connected to the nut via the first portion.
  • the first portion comprises a socket with an internal thread for threaded connection to the trailing end of the rock bolt. Threaded connection via an externally threaded nut and internally threaded socket is advantageous to provide a secure attachment of the adaptor and to minimise the axial separation distance between the meshing plate and the rock strata surface.
  • the extension comprises a threaded bar extending from the socket.
  • the threaded bar is of a smaller outside diameter than an outside diameter of the socket. Such an arrangement is beneficial to allow the meshing plate to fit over and about the adapter as close as possible to the surface of the rock strata.
  • the adapter comprises a nut having a polygonal, square or hexagonal outside surface for the purpose of rotating the adapter by a wrench, spanner or other driving device.
  • the nut is provided at an outside surface of the socket.
  • the nut is provide at an outside surface of the extension.
  • Such an arrangement provides an efficient mounting of the nut for convenient attachment of a spanner, wrench or other driving device.
  • the nut is provided axially between the socket and the extension.
  • the extension comprises a threaded section extending over a first section and an unthreaded section adjacent a leading or free end of the extension.
  • a meshing assembly for installation of meshing sheet against a surface of rock strata according to claim 10.
  • the meshing plate may comprise a collar having a through opening, the extension dimensioned to pass through the opening to enable the meshing plate to be received by and mounted on the adapter.
  • the meshing plate may comprise a skirt or cup. Such an arrangement is advantageous to provide a meshing plate to sit over and about the trailing end of the bolt and an axially inner region of the adapter so as to be positionable in close touching contact with the meshing sheet.
  • the adapter can be a threaded adapter for threaded attachment to a threaded trailing end of the elongate shaft.
  • the adapter can attach to the trailing end of the elongate shaft by other connection, such as by frictional or interference connection.
  • the meshing plate can include a nut or socket that is grooved, or that includes attachment projections, rather than being threaded and the nut or socket can be driven onto the trailing end of the elongate shaft by applying a percussion load (hammering).
  • the meshing plate can alternatively include just an opening that can be frictionally forced over the trailing end and be retained by abutting connection with a protrusion of the trailing end.
  • the trailing end of the elongate shaft can include protrusions, e.g. rings or serrations, which are circular or otherwise shaped for mechanical interaction with the meshing plate nut.
  • each of the trailing end of the elongate shaft and the connector of the meshing plate can include suitable grooves, projections, openings or the like suitable for connection between them.
  • the trailing end of the elongate shaft can be threaded as it might normally be, while the meshing plate nut can include protrusions, such as rings or serrations with the protrusions engaging the thread to connect the meshing plate to the trailing end.
  • One advantage of the use of a connection that is not a threaded connection is that precise alignment of meshing plate on the trailing end during the installation is not as critical as it is with cooperating threads.
  • the adapter can include a socket at one end for attachment to the trailing end of the rock bolt and the extension can extend from the socket for connection of a meshing plate.
  • the extension can extend along the same axis as the socket, i.e., coaxial, and can be of any suitable diameter, but in some forms of the invention, is of a smaller outside diameter than the outside diameter of the socket.
  • the requirement for the extension to have a smaller outside diameter can be driven by the installation equipment that is used to install rock bolts.
  • the extension in the above form of the invention needs to be accommodated in the hole or opening of a standard installation spanner.
  • a standard installation spanner will have a hole or opening diameter of about 28mm and so for that installation spanner, the extension diameter will be about 22mm.
  • the adapter can include a nut section having a square or hexagonal outside surface for the purpose of facilitating attachment of the adapter to the trailing end of the rock bolt by a wrench, spanner or other driving device.
  • the nut section can be formed on the outside surface of the socket (where provided).
  • the nut section can be formed on the outside surface of the extension.
  • the extension is a threaded bar
  • the nut section can be formed in a section of the threaded bar that is left unthreaded for example.
  • a nut section is provided between the socket (where provided) and the extension, such as a threaded bar.
  • the socket and the extension can be generally coaxial.
  • the nut section can likewise be generally coaxial with the socket and the extension where it is provided separately to the socket and the extension.
  • the bar can be threaded fully along its length or it can include a threaded section that is provided on a section of the length of the threaded bar.
  • the threaded bar has a section adjacent the leading or free end of the bar, that has no threads.
  • the unthreaded section is provided for alignment purposes to align the meshing plate and the threaded bar prior to the meshing plate threadably engaging the threaded bar.
  • the unthreaded section has an outside diameter which is a close fit within the threaded opening of the threaded section of the meshing plate and facilitates proper alignment of the meshing plate with the threaded bar prior to any threaded engagement between the meshing plate and the threaded bar. This is important, in that the rock surface to which the meshing plate is fitted will not always be perpendicular to the axis of the rock bolt and where that is the case, the meshing plate can tend to incline relative to the rock bolt and can cause cross-threading. Cross-threading can also occur where the meshing plate is not presented coaxially to the adaptor extension by the installation machine and the unthreaded section in this form of the invention again assists to properly align the extension and meshing plate for proper connection.
  • the meshing plate can be formed integrally to include a section for attachment to the extension, or the meshing plate can be formed in two separate parts comprising a plate part and a connector part.
  • the meshing plate can be formed in a similar manner to that shown in Australian Patent No 2004100042 , in which the plate part is initially connected to a nut part (a connector part) by a tack weld, or alternatively, the plate part and the nut part can be formed separately. Regardless of whether the plate part and the connector part are formed integrally or separately, they each constitute a meshing plate according to the invention.
  • the present invention provides a rock bolt as above described which has a threaded adapter for threaded connection of a meshing plate.
  • the present invention also provides a threaded adapter for threaded connection to a rock bolt and for threaded connection to a meshing plate.
  • the present invention also provides a rock bolt and a meshing plate connected thereto via a threaded adapter.
  • an adapter for use with a rock bolt, the rock bolt having an elongate shaft which has leading and trailing ends for installation in a bore which is drilled into a rock strata, the adapter being arranged for connection to the trailing end of the rock bolt and the adapter including an extension for connection of a meshing plate.
  • a rock bolt having an elongate shaft which has leading and trailing ends for installation in a bore which is drilled into a rock strata, an adapter connected to the trailing end of the rock bolt and the adapter including an extension in connection with a meshing plate.
  • a meshing installation including a rock bolt having an elongate shaft which has leading and trailing ends installed in a bore drilled into a rock strata, an adapter connected to the trailing end, the adapter including an extension the meshing installation having a first section of meshing installed between a wall surface of the rock strata and a rock plate connected to a trailing end of the rock bolt, and a second section of meshing installed overlapping the first section of meshing between the rock plate and a meshing plate, whereby the meshing plate is connected to the extension of the adapter.
  • a method of installing meshing against a rock surface of a body of rock with a rock bolt i. the rock bolt including an elongate shaft which has leading and trailing ends, a rock plate and an adapter connected to the trailing end, the adapter including an extension
  • the method including drilling a bore through the rock surface and into the body of rock, the bore having an opening in the rock surface, placing a first section of meshing against the rock surface and over the opening of the bore, installing a rock bolt through the meshing and into the bore and bringing the rock plate into contact with the first section of wire meshing, placing a second section of meshing over the extension and securing a meshing plate to the extension in contact with the second section of wire meshing.
  • a method of installing wire meshing against a rock surface of a body of rock with a rock bolt iii. the rock bolt including an elongate shaft which has leading and trailing ends, a rock plate and an adapter the adapter including an extension, iv.
  • the method including drilling a bore through the rock surface and into the body of rock, the bore having an opening in the rock surface, placing a first section of wire meshing against the rock surface and over the opening of the bore, installing a rock bolt through the wire meshing and into the bore and bringing the rock plate into contact with the first section of wire meshing, connecting the adapter to the trailing end of the elongate shaft and placing a second section of wire meshing over the extension and securing a meshing plate to the extension in contact with the second section of wire meshing.
  • a rock bolt 10 according to the invention is illustrated and comprises a split tube 11 that extends into a bore 12 that is drilled into rock strata 13.
  • the length of the split tube 11 can be in the order of 1m to 3m.
  • the rock bolt 10 is of the kind that includes and expander mechanism within the split tube 11 towards the leading end of the tube 11.
  • the expander mechanism is shown in simplified form at reference numeral 28 in Figure 1 .
  • the expander mechanism comprises a wedge arrangement and one component of the wedge arrangement connects to a bar 14 that is positioned within the tube 11.
  • rotation of the bar 14 within the tube 11 is operable to activate the expander mechanism to shift the wedge arrangement to expand inside the tube 11, thus tending to expand the tube 11 radially against the facing surfaces of the bore 12.
  • This serves to cause the tube 11 to more firmly engage the surface of the bore 12, so as to firmly anchor the tube 11 within the bore 12.
  • the rock bolt 10 provides rock strata reinforcement.
  • An expander mechanism that operates in this manner is disclosed in Australian Patent Application no 2017901751 .
  • the trailing end of the bar 14 projects out of the bore 12 and thus forms a projecting end 15.
  • a blind nut 16 is attached to the projecting end 15 and has a closed end 17.
  • threading the blind nut 16 onto the projecting end 15 eventually brings the closed end 17 into contact with the end face of the projecting end 15, so that further rotational movement of the blind nut 16 relative to the bar 14 is prevented. That is, any further rotation of the blind nut 16 results in combined rotation of the bar 14 and the nut 16.
  • rotation of the nut 16 facilitates activation of the expander mechanism.
  • Adjacent the blind nut 16 is a washer 18 and inward of the washer 18 is a ring 19.
  • the ring 19 is welded by weld 20 to the outer surface of the tube 11 and provides a bearing surface for a rock plate 21.
  • the rock plate 21 bears against wire meshing 25 and urges the meshing 25 into surface contact with the rock surface 26 of the rock strata 13.
  • the rock bolt 10 is supplied with the ring 19 welded in place against the tube 11 and is installed by applying the washer 18 and the blind nut 16 to one side of the ring 19 and the rock plate 21 to the other side.
  • the wire meshing 25 can be positioned against the rock surface 26 and the tube 11 can then be passed through the meshing 25 and driven into the bore 12 by suitable driving equipment.
  • the blind nut 16 can be rotated to rotate the bar 14 and to activate the expander mechanism which is located towards the leading end of the tube 11.
  • the rock bolt 10 is installed and the meshing 25 is firmly positioned against the rock surface 26.
  • the rock strata is thus reinforced against rock fracture and the rock surface 26 above the meshing 25 is contained against dislodgment of smaller fragments.
  • FIG. 1 shows the thread 31 of the blind nut 16 that is applied to the outer hexagonal surface of the nut 16. The thread is thus made through the corners and flats of the nut 16, so that the nut 16 can be threaded onto the projecting end 15 of the bar 14 and used to drive rotation of the bar 14 to activate the expander mechanism within the split tube 11.
  • the adapter 30 includes a thread 32 within a socket portion 33 so that the adapter 30 can be threadably connected to the blind nut 16.
  • a hexagonal nut 34 Coaxial with the socket portion 33 is a hexagonal nut 34 that is formed integrally with the portion 33 and that provides for connection with a wrench, spanner or other driving device to threadably connect and disconnect the adapter 30 to the blind nut 16. That connection can be made either before the rock bolt is installed or after.
  • the preference is for the adapter 30 to be connected to the nut 16 before the rock bolt is installed in the bore 12 and where that occurs, the nut 34 can be used to rotate the nut 16 and thus the bar 14 to expand the expander mechanism.
  • the adapter 30 further includes a threaded bar 35 which is coaxial with the socket portion 33 and the hexagonal nut 34 and which is threaded to receive a meshing plate 38.
  • the adapter 30 can be applied to the blind nut 16 by hand, such as with a hand-held wrench or spanner, or a motorized driver could be used.
  • the threads 31 and 32 can be formed in a direction so that tightening of the adapter onto the blind nut 16 tends to tighten the blind nut 16 onto the projecting end 15, rather than tending to undo the blind nut 16. This is most important where the adapter 30 is connected to the nut 16 before the rock bolt is installed in the bore 12 and where the nut 34 is driven to expand the expander mechanism.
  • the depth of the socket portion 33 can be such as to bring the inner end 39 of the socket into engagement with the closed facing end 17 of the nut 16. Alternatively, it can be such as to bring the free edge 40 into engagement with the facing surface 41 of the washer 18. Either arrangement is acceptable.
  • the wire meshing 27 can be placed over both the adapter 30 and the other components attached to the projecting end 15 and thereafter, the meshing plate 38 can be threaded onto the threaded bar 35. Meshing plate 38 can be threaded onto the bar 35 to the extent necessary that the leading rim 45 of the plate 38 bares against the meshing 27 and presses it towards the rock surface 26.
  • the meshing plate 38 comprises a skirt or cup 46 and a nut 47.
  • the outer surface of the nut 47 is formed to a square or hexagonal shape for the purpose of being gripped for threading onto the bar 35.
  • the trailing end 48 of the bar 35 is unthreaded in order to properly align the nut 47 of the meshing plate 38 for threaded engagement with the bar 35.
  • the end 48 has an outside diameter which is a close fit within the threaded opening 49 (the minor thread diameter) of the nut 47 and facilitates proper alignment of the opening 49 with the bar 35 prior to any threaded engagement between the respective threads of the bar 35 and the nut 47.
  • the nut 47 can be rotated to threadably engage the meshing plate 38 with the bar 35.
  • the meshing plate 38 can be threaded onto the bar 35 to the extent necessary for the leading rim 45 to properly engage the wire meshing 27 under suitable locating pressure. It will be evident that without the adapter 30, the projecting extent of the nut 16 would not have permitted connection of the meshing plate 38.
  • Figure 2 shows the rock bolt 10 of the present invention fully installed with the adapter 30 in place along with the meshing plate 38.
  • the overlapping edges of the respective wire meshing 25 and 27 can also be seen.
  • Figure 3 shows another example of where the use of the rock bolt 10 is of benefit in which the rock surface 50 is not flat or normal to the axis of the rock bolt 10.
  • the rock bolt 10 is given the same reference numerals as in Figures 1 and 2 , but is shown within a valley.
  • the wire meshing 25 is shown flat against the surface 50, because the rock bolt 10 draws the meshing into the valley.
  • the edge of the wire meshing 27 shown in Figure 3 is elevated away from the surface 50. This is because the wire meshing 27 is supported remotely, at a position typically 0.5 - 2m away from the rock bolt 10.
  • the wire meshing 27 is therefore not drawn into the valley and because the wire meshing 27 is relatively stiff, the edge illustrated in Figure 3 bridges the valley.
  • the adapter 30 allows the meshing plate 38 to be connected to the rock bolt 10 despite the elevated distance of the wire meshing 27 away from the rock surface 50, whereas without the adapter 30, an additional rock bolt would be required.
  • one side of the leading rim 45 of the meshing plate 38 will engage the wire meshing 27 ahead of the other side given the inclined orientation of the meshing 27 relative to the lengthwise axis of the bar 35.
  • the unthreaded trailing end 48 will assist to align the nut 47 of the meshing plate 38 for threaded engagement with the bar 35 without cross-threading.
  • rock bolt 10 has been described as comprising the split tube 11, the blind nut 16, the washer 18 and the ring 19. This description was convenient in relation to the figures which show the adapter as a component which is attached to the rock bolt.

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  • 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)

Claims (12)

  1. Boulon d'ancrage (10) pour une installation dans un alésage (12) formé dans des strates rocheuses (13) comprenant :
    une tige allongée (14) présentant une extrémité d'attaque pour une installation dans l'alésage (12) et une extrémité de fuite pour faire saillie à partir d'une extrémité ouverte de l'alésage (12) ;
    caractérisé par :
    un adaptateur (30) présentant une première portion (33) pouvant être reliée à l'extrémité de fuite de la tige allongée (14) et une extension (35) s'étendant axialement depuis la première portion et configurée pour recevoir et monter une plaque d'engrènement (38) pour porter contre et pousser une feuille d'engrènement (27) en contact avec une surface (26) des strates rocheuses (13), dans lequel l'extension (35) comprend une seconde portion pouvant être reliée à une région de liaison de la plaque d'engrènement (38), dans lequel la seconde portion comprend des filets prévus au niveau de l'extension (35), et dans lequel le boulon d'ancrage (10) présentant un écrou (16) appliqué à l'extrémité filetée et l'écrou (16) présentant une surface extérieure filetée et l'adaptateur (30) étant relié par filetage à l'écrou (16) via la première portion (33).
  2. Boulon d'ancrage selon la revendication 1, dans lequel la première portion (33) comprend un connecteur avec un filet interne (32) pour la liaison filetée avec l'extrémité de fuite du boulon d'ancrage (10).
  3. Boulon d'ancrage selon la revendication 2, dans lequel l'extension (35) comprend une barre filetée s'étendant depuis le connecteur.
  4. Boulon d'ancrage selon la revendication 3, dans lequel la barre filetée est de plus petit diamètre extérieur qu'un diamètre extérieur du connecteur.
  5. Boulon d'ancrage selon une quelconque revendication précédente, dans lequel l'adaptateur (30) comprend un écrou (34) présentant une surface extérieure polygonale, carrée ou hexagonale dans le but de faire tourner l'adaptateur (30) par une clé, un tendeur ou un autre dispositif d'entraînement.
  6. Boulon d'ancrage selon la revendication 5, dans lequel l'écrou (34) est prévu au niveau d'une surface extérieure du connecteur.
  7. Boulon d'ancrage selon la revendication 5, dans lequel l'écrou (34) est prévu au niveau d'une surface extérieure de l'extension (35).
  8. Boulon d'ancrage selon la revendication 6 ou 7, dans lequel l'écrou (34) est prévu axialement entre le connecteur et l'extension (35).
  9. Boulon d'ancrage selon une quelconque revendication précédente, dans lequel l'extension (35) comprend une section filetée s'étendant sur une première section et une section non filetée (48) adjacente à une extrémité d'attaque ou libre de l'extension (35).
  10. Ensemble d'engrènement pour l'installation de feuille d'engrènement contre une surface (26) de strates rocheuses (13) comprenant :
    un boulon d'ancrage (10) selon une quelconque revendication précédente ;
    une première section (25) d'engrènement pouvant être positionnée contre la surface (26) des strates rocheuses (13) ;
    une plaque rocheuse (21) pouvant être reliée à l'extrémité de fuite du boulon d'ancrage (10) pour porter contre et pousser la première section (25) en contact avec la surface (26) des strates rocheuses (13) ;
    une seconde section (27) d'engrènement pouvant être positionnée contre la surface (26) des strates rocheuses (13) et recouvrant la première section (25) ; et
    une plaque d'engrènement (38) pouvant être reliée à l'extension (35) et configurée pour porter contre et pousser la seconde section (27) en contact avec la surface (26) des strates rocheuses (13).
  11. Ensemble selon la revendication 10, dans lequel la plaque d'engrènement (38) comprend un collier (47) présentant une ouverture débouchante (49), l'extension (35) étant dimensionnée pour passer à travers l'ouverture (49) pour permettre à la plaque d'engrènement (38) d'être reçue par et montée sur l'adaptateur (30).
  12. Ensemble selon la revendication 11, dans lequel la plaque d'engrènement (38) comprend une jupe ou coupelle (46) s'étendant depuis le collier (47) et dimensionnée pour loger sur et autour de l'extrémité de fuite du boulon d'ancrage (10).
EP18762039.8A 2017-08-22 2018-08-21 Boulon d'ancrage avec adaptateur d'engrènement Active EP3673151B1 (fr)

Applications Claiming Priority (2)

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AU2017903382A AU2017903382A0 (en) 2017-08-22 Rock bolt with meshing adapter
PCT/EP2018/072476 WO2019038247A1 (fr) 2017-08-22 2018-08-21 Boulon d'ancrage avec adaptateur d'engrènement

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EP3673151A1 EP3673151A1 (fr) 2020-07-01
EP3673151B1 true EP3673151B1 (fr) 2023-06-07
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US11028692B2 (en) * 2017-11-27 2021-06-08 Sandvik Intellectual Property Ab Rock bolt with meshing adapter
CN110905569A (zh) * 2019-11-28 2020-03-24 国家电网有限公司 一种预应力锚杆张拉装置

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AU2004100042A4 (en) * 2003-02-17 2004-03-04 Dywidag-Systems International Pty Limited Apparatus for Securing Wire Mesh to a Rock Face

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DE3243852C2 (de) * 1982-11-26 1984-10-31 Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum Verbundausbau
DE19638050A1 (de) * 1996-09-18 1998-03-19 Ruhrkohle Ag Ankerplatte für den Ankerausbau
DE102007026990A1 (de) * 2006-06-30 2008-04-10 Skumtech As Ausbau im Hoch- und Tiefbau
AU2008207662B2 (en) * 2007-09-04 2015-02-05 Fci Holdings Delaware, Inc. End coupling for a rock bolt
AU2011236039B2 (en) 2010-10-18 2012-06-28 Sandvik Intellectual Property Ab Rock bolt hanger system
AU2013203198B2 (en) 2012-06-18 2016-01-14 Sandvik Intellectual Property Ab An anchor mechanism and a cable rock bolt
CA2916043C (fr) * 2013-07-30 2021-11-09 Dywidag-Systems International Pty Limited Ensemble boulon a friction
DE102014002566A1 (de) 2014-02-26 2015-08-27 K + S Kali Gmbh Befestigungssystem unter Tage umfassend einen Gebirgsanker mit Anschlageinrichtung
CL2016000682A1 (es) * 2015-12-10 2016-09-30 Ncm Innovations Pty Ltd Anclaje de roca de soporte de malla
WO2017136880A1 (fr) * 2016-02-09 2017-08-17 Fero Strata Systems Pty Ltd Adaptateur de boulon d'ancrage

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AU2004100042A4 (en) * 2003-02-17 2004-03-04 Dywidag-Systems International Pty Limited Apparatus for Securing Wire Mesh to a Rock Face

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AU2018319717A1 (en) 2020-02-27
AU2018319717B2 (en) 2023-11-23
WO2019038247A1 (fr) 2019-02-28
EP3673151C0 (fr) 2023-06-07
EP3673151A1 (fr) 2020-07-01

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