WO2018231117A1 - Agencement et procédé au niveau d'un renfort de roche - Google Patents

Agencement et procédé au niveau d'un renfort de roche Download PDF

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Publication number
WO2018231117A1
WO2018231117A1 PCT/SE2018/050507 SE2018050507W WO2018231117A1 WO 2018231117 A1 WO2018231117 A1 WO 2018231117A1 SE 2018050507 W SE2018050507 W SE 2018050507W WO 2018231117 A1 WO2018231117 A1 WO 2018231117A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixer
bolt
rock
arrangement
unit
Prior art date
Application number
PCT/SE2018/050507
Other languages
English (en)
Inventor
Viktor BERGQVIST
Johan Engblom
Martin Ekefalk
Original Assignee
Epiroc Rock Drills Aktiebolag
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 Epiroc Rock Drills Aktiebolag filed Critical Epiroc Rock Drills Aktiebolag
Publication of WO2018231117A1 publication Critical patent/WO2018231117A1/fr

Links

Classifications

    • 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
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts
    • 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

Definitions

  • Present invention relates to mining industry.
  • the invention relates to an arrangement and a method at rock reinforcement, for example in conjunction with tunnelling.
  • rock reinforcement A common method for rock reinforcement is rock bolting.
  • Rock bolting means that a bolt adapted for rock bolting is fastened in a drilled hole by a molding agent that is injected into the hole be using a system adapted for use at rock reinforcement. In this way binds and keeps the layers together and thus reduces the risk of race.
  • the casting agent may for example be a component mixture injected through a mixer in which various components are mixed while injected via the mixer in the hole.
  • self-drilling bolts are used where the mixer is integrated into the bolt, i.e. is firmly mounted at the bolt before the bolt is drilled into the rock.
  • An integrated mixer can, however, be an obstacle to, for example, a flushing fluid pumped through the bolt while the bolt is drilled into the rock.
  • JP2002129900 describes a method for placing a mixer at a self-drilling bolt.
  • an adapter is used in which the mixer may be placed.
  • the adapter comprises threads by which the adapter may be fastened at the bolt.
  • An object of the invention is to making the process at rock reinforcement more efficient.
  • the object is achieved by an arrangement for use at rock reinforcement comprising: a mixer unit adapted to carry at least one mixer intended to achieve a mixture of at least two components and to inject the mixture into a rock hole to achieve said rock reinforcement.
  • the mixer unit is thereby arranged to receive at least one mixer. With other words, at least one mixer can be placed in the mixer unit and be stored in the mixer unit.
  • the arrangement comprises a first positioning device arranged to position said mixer unit in an application position in relation to a bolt arranged in said rock hole. Thereby the position or location of the mixer unit in relation to the bolt may be changed by using the first positioning device.
  • the application position of the mixer unit refers to a position in relation to the bolt where the application, i.e. positioning of a mixer arranged in the mixer unit at the bold is enabled in a simple and an efficient way.
  • the arrangement comprises also a transport device arranged to bring a mixer from the mixer unit to an injection position at said bolt whereby injection of said mixture through the mixer into the rock hole is allowable, this at said application position of said mixer unit. Thereby the mixer may be moved from the mixer unit to the bolt and to the injection position at the bolt by using the transport device.
  • the mixer can be positioned at the bolt in said injection position after the bolt has been placed in the rock hole, for example after the bolt has been drilled.
  • the mixer does not constitute any obstacle to, for example, a flushing liquid while the bolt is drilled into the rock.
  • the placement of a mixer at a bolt can be automated, i.e., performed mechanically and without the need for an operator to be near a bolt to position the mixer at the bolt.
  • the risk of injury associated with rock reinforcement can be reduced.
  • the process of placing a mixer at a rock bolt can be made more efficient by means of the arrangement, i.e. the time required to place a mixer at a bolt can be shortened.
  • an arrangement for use in rock reinforcement is provided which can achieve the above-mentioned object.
  • the transport device may comprise a transport line arranged for transport of the mixer from the mixer unit to the injection position at the bolt.
  • the transport line may be used as a path or track for the mixer while the mixer is moved from the mixer unit to the bolt.
  • the mixer unit With the transport line comprised in the arrangement, the mixer unit can be placed in said injection position at a distance from the bolt because the mixer can be brought towards, i.e. can be transported to the bolt using the transport line.
  • the arrangement may comprise a second positioning device arranged to position the transport line in relation to the bolt so that transport of the mixer from the mixer unit to the injection position at the bolt is allowable.
  • the second positioning device With the second positioning device, the position of the transport line relative to the bolt can be changed.
  • the transport line or a part of the transport line may be moved in relation to the bolt so that the mixer can be transported from the mixer unit to the injection position at the bolt through the transport line in a simple and efficient manner. Thereby, placement of the mixer in said injection position at the bolt is facilitated.
  • the transport line may comprise a compressor for creating a compressed air, wherein the mixer is brought towards the bolt using the compressed air.
  • the mixer can be transported to the bolt in a simple and efficient manner by means of pressure force from the compressed air acting on the mixer.
  • the transport device may comprise a piston rod, wherein the mixer is brought towards the bolt using a pressure force that is transmitted to the mixer through the piston rod.
  • the mixer unit may comprise a hose.
  • the hose is meant a tube or pipe. Since the mixer unit is adapted to carry at least one mixer and since the mixer unit may comprise a hose, at least one mixer can be placed in the hose and along the hose, i.e. in the extension direction of the hose. Further, a flexible, i.e. bendable mixer unit can be achieved. With this, positioning of the mixer unit at the bolt can be facilitated.
  • the transport device may be arranged to bring the mixer to the injection position at the bolt by a second mixer that is moved within the hose.
  • the mixer and the second mixer can be placed consecutively, i.e. one after another in the hose and the mixer can be transported along the hose by the other mixer acting on the mixer.
  • the other mixer can push the mixer and act on the mixer with a pressure force to cause the mixer to move inside the hose.
  • the mixer unit may comprise a magazine and thereby at least one mixer may be placed and by carried in the magazine.
  • magazine herein is meant, for example, a box or container adapted to carry at least one mixer.
  • the arrangement can be adapted to be mounted at a vehicle. Thereby, the arrangement can be fixed to a vehicle and thus to provide a mobile arrangement that can change position by the vehicle when the arrangement has been mounted on the vehicle.
  • a second aspect of the invention by a method at rock reinforcement that is performed by using an arrangement comprising: a mixer unit adapted to carry at least one mixer intended to achieve a mixture of at least two components and to inject the mixture into a rock hole to achieve said rock reinforcement, a first positioning device arranged to position said mixer unit in an application position in relation to a bolt arranged in the rock hole and a transport device arranged to bring a mixer from the mixer unit to an injection position at the bolt whereby injection of the mixture through the mixer into the rock hole is allowable, this at the application position of the mixer unit.
  • the method comprises to place at least one mixer in the mixer unit, to position the mixer unit at the application position in relation to the bolt by using the first positioning device and to bring the mixer from the mixer unit towards the bolt to the injection position by activating the transport device.
  • the mixer can be moved from the mixer unit towards the bolt to said injection position at the bolt by using the transport device.
  • the method may comprise to start a compressor comprised in said transport device to bring said mixer towards the bolt by using compressed air generated by said
  • the mixer can be transported to the bolt in a simple and efficient manner by means of pressure force from the compressed air acting on the mixer.
  • the method may comprise to activate a piston rod comprised in the transport device to bring said mixer towards the bolt by using a pressure force that is transmitted to said mixer through the piston rod.
  • the method may comprise to activate a second positioning device to position a transport line in relation to the bolt so that transport of the mixer through the transport line from the mixer unit to the injection position at the bolt is allowable.
  • the transport line or a part of the transport line may be moved in relation to the bolt so that the mixer can be transported from the mixer unit to the injection position at the bolt through the transport line in a simple and efficient manner. Thereby, placement of the mixer in said injection position at the bolt is facilitated.
  • Fig. 1 is a schematic illustration of a rig with an arrangement for use at rock
  • Fig. 2 is a schematic illustration of an arrangement for use at rock reinforcement according to a second embodiment
  • Fig. 3 is a schematic illustration of an arrangement for use at rock reinforcement according to a third embodiment
  • Fig. 4 is a flowchart showing a method at rock reinforcement.
  • FIG. 1 illustrates an exemplary embodiment of an arrangement 1 for use at rock reinforcement, or sometimes called rock bolting.
  • Figure 1 also illustrates a drill rig 2 at which the arrangement 1 has been mounted.
  • Figure 1 also is shown a cross section through a part of a rock bolt 4 that has been placed in a rock hole.
  • a self- drilling bolt comprises a drill bit illustrated in Figure 2 with reference 6.
  • the rock bolt 4 in Figure 2 illustrates a self-drilling bolt.
  • a self-drilling rock bolt is placed in a rock hole while the rock hole is being created, i.e. is drilled be using the self-drilling bolt.
  • Self- drilling rock bolts are known in the art and are therefore not described more in detail herein.
  • a bolt adapted for rocks After a bolt adapted for rocks has been placed in a rock hole, it is anchored in the rock hole by using a molding agent injected into the rock hole.
  • the molding agent solidifies, or is hardened inside the rock hole and around the rock hole, and by this the bolt adapted for rocks is anchored inside the rock hole.
  • the bolt adapted for rocks is fastened in the rock hole by using the molding agent.
  • a bolt adapted for rocks that has been anchored in a rock hole reinforces the mountain at and around the rock hole.
  • a self-drilling bolt usually comprises a channel within the bolt through which said molding agent can be injected into the rock hole.
  • a self-drilling rock bolt can be hollow so that the component mixture can be injected through the rock bolt and out through a drill bit placed outermost on the bolt.
  • the molding agent may be a component mixture which may include two components intended for rock reinforcement i.e. the components are produced for example for this purpose.
  • the first component may contain a hardener such as sodium silicate, an alcohol, a polyol or the like or a combination thereof.
  • the second component may contain a resin such as diphenylmethane diisocyanate (MDI) or the like.
  • MDI diphenylmethane diisocyanate
  • the first component and the second component are intended to be mixed with each other when injected into the rock hole when a mixture is created.
  • the mixture is created by using a mixer through which the two components are injected into the rock hole. Once the components have been mixed together, a reaction of the resin is triggered by the hardener which causes the resin to form crosslinking which causes the mixture to harden.
  • a rock bolt has been placed in the rock hole, for example has been drilled with a drill machine in case if the rock bolt is a self-drilling bolt
  • the drill machine is moved from the bolt to prepare for placing a mixer at the bolt. Once the mixer has been placed at the bolt, injection of the components adapted for rock reinforcement can be started.
  • Fig. 1 illustrates an arrangement 1 for use at rock reinforcement, comprising:
  • a mixer unit 3 adapted to carry at least one mixer 5 intended to achieve a mixture of at least two components and to inject the mixture into a rock hole to achieve said rock reinforcement.
  • Mixer 5, 5.1 is adapted for use at rock reinforcement through its design and size as well as material it is made of.
  • Mixer 5, 5.1 may comprise a mesh-like inner part by means of which components can be mixed while passing mixer 5, 5.1.
  • Mixer 5, 5.1 may be made of metal or a plastic material adapted for use in contact with various components intended for rock reinforcement.
  • the mixer unit 3 is formed as a hose 3, i.e. an elongated and flexible tube that can be made of a plastic material.
  • the hose 3 is thus flexible and can be easily mounted to the rig 2.
  • the hose 3 has a length greater than the length L of the rig 2 to enable movement of an end 8 of the hose 3 relative to the rig 2.
  • the arrangement 1 comprises a first positioning device 7 arranged to position the mixer unit 3 in an application position in relation to the bolt 4.
  • the first positioning device 7 may comprise a positioning element 10 as for example a sled movably arranged at a positioning track 12 as for example a rail. Thereby, the positioning element 10 may be moved along the positioning track 12.
  • the mixer unit 3 can be positioned in said application mode. In this way the mixer unit 3 may be positioned in said application position.
  • the application position of the mixer unit 3 refers to a position relative to the bolt 4 where application, i.e. placement of a mixer 5 arranged in the mixer unit 3 at the bolt 4 is made possible in a simple and efficient manner.
  • the end 8 of the hose 3 is placed so that the axis of the end 8 (not shown) coincides with the axis A of the bolt 4.
  • the mixer 5 can be moved from the mixer unit 3 to an injection position at the bolt 4 where the injection of said mixture through the mixer 5 into the rock hole is allowed.
  • the mixer 5 is illustrated in an injection position at the bolt 4. In said injection position, the mixer 5 may be positioned so that the mixer 5 contacts an outer edge 14 of the bolt 4.
  • the mixer 5 can be placed inside the bolt 4.
  • the mixer 5 is inserted into the bolt 4 a distance corresponding to the half the length of the mixer 5.
  • a stop element (not shown) may be arranged within the bolt 4 to define the distance the mixer 5 may be inserted into the bolt 4 to reach said injection position.
  • the arrangement 1 comprises a transport device 9 arranged so, in the application position of the mixer unit 3 as described above, to bring the mixer 5 from the mixer unit 3 to said injection position at the bolt 4.
  • the transport device 9 may comprise a compressor 15 to create compressed air, wherein the mixer 5, 5.1 can be brought towards the bolt 4 by using the compressed air. In other words, the mixer 5, 5.1 can be pushed against the bolt by the means of the compressed air.
  • the mixer 5.1 has been placed in the injection position at the bolt 4 while the bolt 5 has been placed in the mixer unit 3 and has been prepared to be transported through the hose 3.
  • a mixer 5 in the mixer unit 3 can be performed manually or by means of a feeder which can feed the mixer 5 into the mixer unit 3.
  • several mixers 5 can be placed in the hose 3 and be brought to the bolt 4 by using, for example, pressurized air or by using a piston rod.
  • the mixers can be placed consecutively, i.e. one after another.
  • Fig. 2 illustrates an alternative embodiment of the arrangement 1.
  • the mixer unit 3 can be designed as a circular magazine for a plurality of mixers 5.
  • the mixer unit 3 may be configured as a turret magazine.
  • the mixing unit 3 can be mounted on a rig (not shown in Fig.2) so that the mixer unit 3 can be rotated about a unit axis E by using the first positioning device 7.
  • the mixer unit 3 can be moved from the bolt 4, for example, while the bolt 4 is drilled into the rock and the mixer unit 3 can be moved towards the bolt 4 by using the first positioning device 7 and by rotation of the mixer unit 3 about the unit axis E.
  • the mixer unit 3 can be positioned at the bolt 4 to allow the positioning of a mixer 5 at the bolt 4.
  • the first positioning device 7 may be arranged to rotate the mixer unit 3 about a rotation axis M and thus, at least one mixer 5 of the plurality of mixers placed in the mixer unit 3 can be positioned at the bolt 4 so that positioning of the mixer 5 at the bolt 4 is allowed.
  • the arrangement 1 comprises a transport device 9 comprising a piston rod 17.
  • the transport device 9 may comprise a motor (not shown) arranged to move the piston rod 17 along a transport shaft T towards the mixer unit 3.
  • the mixer 5 can be moved from the mixer unit 3 to the injection position at the bolt simply by pressure force which is transferred to mixer 5 through the piston rod 17.
  • the mixer 5 can be brought towards the bolt 4 when the axis A of the bolt 4 coincides with the axis m of the mixer 5 and when the transport axis T coincides with the axis A and m.
  • Fig. 3 illustrates a further alternative embodiment of the arrangement 1 where the arrangement 1 comprises a transport line 11 arranged for transporting mixer 5 from the mixer unit 3 to the injection position at the bolt 4 as described above.
  • the arrangement comprises a second positioning device 13 arranged to position the transport line 1 1 or a portion of the transport line 11 in relation to the bolt 4 so that transport of mixer 5 from the mixer unit 3 to the injection position at the bolt is allowed.
  • the transport line 1 1 may, for example, be a second hose similar in its construction as the hose 3 described above.
  • the mixer 5 can be transported from the mixer unit 3 to the injection position at the bolt 4, for example, by using compressed air or by using a second piston (not shown) adapted, for instance by its length for transporting one or more mixers through the transport line 1 1.
  • Fig. 4 shows an example of a method at rock reinforcement which is performed by using an arrangement 1 as above.
  • the method 100 can be performed, for example, by a control unit (not shown).
  • the method 100 may comprise to place 101 at least one mixer (5) in said mixer unit 3, to position 103 the mixer unit at an application position in relation to the bolt by using a first positioning device and to bring 105 the mixer from the mixer unit towards the bolt to said injection position by activating of the transport device.
  • a mixer at a bolt can be automated, i.e. performed
  • the process of placing a mixer at a rock bolt can be made more efficient by means of the arrangement, i.e. the time required to place a mixer at a bolt can be shortened.
  • the process of placing a mixer at a rock bolt can be made more efficient by applying the method as above. Therefore, the time required to place a mixer at a bolt can be shortened.
  • the method 100 may comprise to start 107 a compressor comprised in the transport device to bring the mixer towards the bolt by using compressed air generated by the compressor.
  • the method 100 may also comprise, to activate 109 a piston rod comprised in the transport device to bring the mixer towards the bolt by using a pressure force that is transmitted to the mixer through the piston rod.
  • the method 100 may also comprise to activate 1 11 a second positioning device to position a transport line in relation to the bolt so that transport of said mixer through the transport line from the mixer unit to the injection position at the bolt is allowable.

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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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

L'invention concerne un agencement (1) destiné à être utilisé dans un renfort de roche. L'agencement (1) comprend : une unité de mélangeur (3) conçue pour transporter au moins un mélangeur (5) destiné à obtenir un mélange d'au moins deux composants et à injecter le mélange dans un trou de roche pour obtenir le renfort de roche, un premier dispositif de positionnement (7) conçu pour positionner l'unité de mélangeur (3) dans une position d'application par rapport à un boulon ménagé dans le trou de roche et un dispositif de transport (9) conçu pour amener un mélangeur (5) à partir de l'unité de mélangeur (3) vers une position d'injection au niveau du boulon, l'injection dudit mélange à travers le mélangeur (5) dans le trou de roche étant autorisée au niveau de ladite position d'application de ladite unité de mélangeur (3). L'invention concerne également un procédé (100) au niveau du renfort de roche.
PCT/SE2018/050507 2017-06-14 2018-05-17 Agencement et procédé au niveau d'un renfort de roche WO2018231117A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1750752A SE541882C2 (sv) 2017-06-14 2017-06-14 Arrangemang och metod vid bergförstärkning
SE1750752-6 2017-06-14

Publications (1)

Publication Number Publication Date
WO2018231117A1 true WO2018231117A1 (fr) 2018-12-20

Family

ID=64660596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2018/050507 WO2018231117A1 (fr) 2017-06-14 2018-05-17 Agencement et procédé au niveau d'un renfort de roche

Country Status (2)

Country Link
SE (1) SE541882C2 (fr)
WO (1) WO2018231117A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2100146A (en) * 1981-05-04 1982-12-22 Terra Tek Inc Roof bolt grouting
CA1236987A (fr) * 1984-05-30 1988-05-24 Karl E. Persson Methode, organe et machine d'ancrage dans le roc en plafond d'une galerie
US20070264088A1 (en) * 2004-10-21 2007-11-15 Archibald Richter Method for Embedding Rock Anchors
WO2012171056A1 (fr) * 2011-06-14 2012-12-20 Shane Brown Appareil d'injection de résine destiné à un appareil de forage permettant d'installer un tirant d'ancrage
WO2016141008A1 (fr) * 2015-03-03 2016-09-09 J-Lok Co. Résine à deux composants pouvant être pompée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2100146A (en) * 1981-05-04 1982-12-22 Terra Tek Inc Roof bolt grouting
CA1236987A (fr) * 1984-05-30 1988-05-24 Karl E. Persson Methode, organe et machine d'ancrage dans le roc en plafond d'une galerie
US20070264088A1 (en) * 2004-10-21 2007-11-15 Archibald Richter Method for Embedding Rock Anchors
WO2012171056A1 (fr) * 2011-06-14 2012-12-20 Shane Brown Appareil d'injection de résine destiné à un appareil de forage permettant d'installer un tirant d'ancrage
WO2016141008A1 (fr) * 2015-03-03 2016-09-09 J-Lok Co. Résine à deux composants pouvant être pompée

Also Published As

Publication number Publication date
SE541882C2 (sv) 2020-01-02
SE1750752A1 (sv) 2018-12-15

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