WO2020047562A1 - An integrated bolt rotator and grout nozzle device for use in a mechanised bolting application - Google Patents
An integrated bolt rotator and grout nozzle device for use in a mechanised bolting application Download PDFInfo
- Publication number
- WO2020047562A1 WO2020047562A1 PCT/ZA2019/050053 ZA2019050053W WO2020047562A1 WO 2020047562 A1 WO2020047562 A1 WO 2020047562A1 ZA 2019050053 W ZA2019050053 W ZA 2019050053W WO 2020047562 A1 WO2020047562 A1 WO 2020047562A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grout
- shaft
- bolt
- delivery device
- rock
- Prior art date
Links
- 239000011440 grout Substances 0.000 title claims abstract description 108
- 239000011435 rock Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 4
- 238000003032 molecular docking Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005086 pumping Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000009987 spinning Methods 0.000 description 4
- 230000003319 supportive effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
Definitions
- the invention relates to an integrated bolt rotator and pumping nozzle device for use in a mechanised rock bolting application.
- a drill rig is employed to achieve this mechanised procedure.
- a typical drill rig for this process has a boom with a carousel.
- the carousel is pivotally movable and rotatable relatively to the boom.
- On the carousel a drill is engaged.
- the drill is actuated to drill the rock hole.
- the carousel can also support a rock bolt, in a holder, and includes a drive means which after axial alignment, drives the rock bolt into the rock hole. In doing so, the drive means engages a trailing end of the rock bolt. To achieve this, a leading end of the drive means often is adapted not only to provide a driving force, to insert the rock bolt, but also, to spin the rock bolt, once the bolt is inserted, to place the bolt in tension. [0005] In a grouted rock bolt application, the carousel additionally supports an adhesive material input means, such as a nozzle or injection pipe, connected to a feed hose and pump.
- an adhesive material input means such as a nozzle or injection pipe
- the carousel For each installation, the carousel must rotate to index the relevant tool (i.e. drill, drive means, nozzle) with the rode hole and/or the rock bolt. So, for example, once the rock hole has been drilled by the drill, the carousel is rotated to bring the rock bolt in register with the rock hole, so that it may be driven into the rock hole by the drive means, as the drill rotates away. Once the rock bolt has been driven into the rock hole and tensioned, the drive means rotates away as the nozzle rotates into alignment with the trailing end of the roc* bolt.
- the relevant tool i.e. drill, drive means, nozzle
- the invention at least partially solves the aforementioned problems.
- grout is used to refer to any adhesive material, whether a resin based adhesive or a cementious adhesive.
- the invention provides an integrated bolt rotating and a grout delivery device for use in a mechanised rock bolting application which includes a bolt rotator which has a shaft with a first end, adapted for engagement to a drill rig drive means, and a second end in which a rock bolt engaging socket is defined; and a grout delivery nozzle which has a body, a grout duct formed through the body adapted to channel a grout material from an exterior to an interior of the body; wherein the body is adapted to engage the shaft to move reciprocally along the shaft between a forward position, in which the body at least partially overlaps the second end of the shaft, and a retracted position in which the body is spaced from the second end.
- the nozzle body may be engageable to a pneumatic or hydraulic moving means to move the body between the retracted position and the forward position.
- the nozzle body may include a first inlet port into the grout duct engageable to a grout source.
- the nozzle body may include a second inlet port which communicates the exterior of the body with the conduit.
- the second inlet port may be connectable to a water source for flushing of the grout conduit.
- the nozzle body may have a passage through which the shaft is received in engagement of the body to the shaft to circumscribe the shaft.
- the grout conduit may terminate in a distributing channel formed in a wall of the passage and the grout conduit terminates in the distributing channel formed in a wall of the passage.
- the invention further provides a method of introducing a grout into a rock hole, post installation of a rock bolt, which rock bolt includes, on a threaded projecting section of the bolt, a docking member which has a grout conduit which communicates an exterior surface of the member with a grout tube which extends into an interior of the rock hole, and a tensioning nut between the docking member and a projecting end of the bolt, using the device described above, the method includes the steps of:
- the method may include the additional step, after step (d), of retracting the nozzle body and pumping water through the grout duct, via the second inlet port, to flush the grout duct of residual grout.
- a grouted rock bolt installation method in accordance with another aspect of the invention includes the steps of (a) providing a rock bolt which includes, on a threaded projecting section of the bolt, a docking member which has a grout conduit which communicates an exterior surface of the member with a grout tube which extends into an interior of the rock hole, and a tensioning nut between the docking member and a projecting end of the bolt; (b) inserting the rock bolt into a predrilled rock hole; (c) providing a device in accordance with the preceding statemens; (d) engaging the socket with the nut when the nozzle body is in the retracted position; (e) spinning the bolt rotator to turn the nut along the threaded section of the bolt into load supportive abutment with the docking member; (f) moving the nozzle body from the retracted position to the forward position to receive at least part of the docking member within the passage of the body engage with the docking member in a position in which the grout conduit of
- the method may include the additional step, after step (e), of retracting the nozzle body and pumping water through the grout duct, via the second inlet port, to flush the grout duct of residual grout
- the invention extends to an integrated bolt rotating and a grout delivery device for use in a mechanised rock bolting application which includes a bolt rotator which has a shaft with a first end, adapted for engagement to a drill rig drive means, a second end which has a rock bolt engaging socket, a bore which extends at least partially through the shaft opening at the socket and an aperture opening through a wall of the shaft into bore; and a grout delivery terminal which has a body with a grout duct and a first inlet port and which body engages the shaft over the aperture to communicate an exterior of the body with the bore.
- the shaft may include an opening which opens into the bore and through which a flushing fluid, such as water, may be passed to flush the bore of residual grout.
- a flushing fluid such as water
- the device may include a check valve in the bore between the aperture and the opening which is configured to close when grout flows in a back direction towards the first end of the shaft and to open when a flushing fluid flows in a forward direction towards the second end of the shaft.
- the grout delivery terminal may have a circular body which circumscribes the shaft.
- the shaft may include a radial plurality of apertures formed through the wall.
- the grout delivery terminal may include a distributing channel formed in a wall of the body which leads from the grout duct and which distributes grout around the shaft to access the plurality of apertures.
- the invention provides a method of introducing a grout into a rock hole, post installation of a rock bolt, which rock bolt is hollow, defining a tube which opens at each end of the bolt, and which bolt has a tensioning nut on a threaded projecting section of the bolt, using the device described above, the method includes the steps of: (a) engaging the socket with the nut and spinning the bolt rotator to turn the nut along the threaded section of the bolt into load supportive abutment with a faceplate on the bolt; and
- the method may include the additional step of pumping water through the hole and along the bore, via the check valve, to flush the bore of residual grout.
- Figure 1 diagrammatically represents a drill rig to which a which an integrated bolt rotating and a grout delivery device in accordance with the invention is engaged;
- Figure 2 - 6 is a chronological series of drawings showing a first embodiment of the device of the invention in operation.
- Figures 7 - 10 is a chronological series of drawings showing a second embodiment of the device of the invention in operation.
- FIG. 1 illustrates a drill rig 10 that is used in a mechanised rock hole drilling and rock bolt installation process.
- the drill rig 10 has a boom 12 that is pivotally connected to the body 14 of the rig to bring a carousel 16 to a rock face 18 within which the installation is to take place.
- the carousel is pivotally and rotationai!y moveable relatively to the boom.
- the carousel comprises a plurality of functional components including a rock drill 20, a rock bolt holder 22, supporting a rock bolt 24, and grout delivery device 26 which is in accordance with the invention.
- the device 26A includes a bolt engaging component 28 and a grout delivery component 32.
- the bolt engaging component comprises a shaft 30 with a first end (not shown) and an opposed second end 34.
- the first end is adapted for attachment to a drill rig, preferably to the drive means 35 of the drill rig.
- the second end 34 of the shaft is adapted with a socket 36.
- the drive means can be hydraulically or pneumatically actuated and can impart both axial and rotational drive to the shaft.
- the axial drive not only brings the shaft into guiding engagement with the rock bolt but it can also drive the rock bolt into a predrilled rock hole.
- the grout delivery component comprises a hemispherical nozzle body 38 with a forward end 40 and a back end 42.
- the body defines and circumscribes a central cylindrical passage 44 (see Figures 6) which opens onto each of these ends.
- the shaft 30 passes through the passage to slidably mount the body on the shaft.
- the passage 30 has a first section 43 of a first diameter, which opens onto the back end 42, and a second section 45 of a second diameter, which is larger than the first diameter, and which opens onto the forward face 40.
- the first diameter is slightly larger than the diameter of the shaft. With a small tolerance, the nozzle body rides smoothly on the shaft, with little lateral rock. The increased tolerance between the second section 45 of the passage 30 and the shaft provides a docking space 44 which opens on the forward face 40.
- a circular distribution channel 46 is formed in a surface of the wall of the second section 45 of the passage 30.
- the grout delivery component 32 further includes a grout port 48 connectable to a grout source (not shown) and a flushing port 50 connectable to a water source (not shown). Each port is laterally extensive of the nozzle body 38 and each port opens into the circular distribution channel 46.
- the nozzle body 38 is axially moveable along the shaft between a retracted position, as illustrated in Figure 3, and a forward position, as illustrated in Figure 5.
- the nozzle body is moved between these two positions by a pneumatic or hydraulic moving means (not illustrated).
- the device 26 can be capacitated to impart axial drive to drive a bolt into a rock hole, this step is not an essential function of the device. This step can be just as well facilitated by a separate functional component on the carousel. Therefore, a rock bolt insertion step is not explained further.
- the rock bolt 24 is already functionally fully inserted into a rock hole 49.
- the rock bolt 24, in this specific example, is of a type that is described in South African patent number 2012/07431.
- This bolt includes an elongate shank 52, with a threaded end section 54, which terminates at a proximal end 56. Part of this threaded end-section projects from the rock hole as illustrated in Figure 3.
- the bolt has a barrel 58 which has a central bore 60 for receiving the shank, A pair of grout openings 62.1 and 62.2 is formed in the side wall of the barrel, communicating the exterior of the barrel with the bore.
- the bolt also has a sleeve 64 over the shank. One end of the sleeve is received in the bore of the barrel.
- a tensioning nut 66 is threaded onto the threaded portion, behind a load indicator 68 or, in the absence of which, the barrel 58.
- the nozzle body 38 is driven forward along the shaft, from its retracted position to the forward position, at which point a trailing portion 70 of the barrel, which includes the openings to the grout openings 62, is received in the docking space 44 of the body 38.
- the depth of the docking space positions the grout conduits 62 adjacent the distribution channel 44. Sealing formations (not shown) seal the docking engagement of the grout openings of the barrel with the distribution channel of the nozzle body 38 of the device 26.
- Grout now can be pumped into the rock hole via the grout port 48, the distribution channel 46, the grout openings 62, the bore 60 and finally into the annular space between the rock bolt shank 52 and the sleeve 64.
- the grout percolates along the length of the sleeve to cascade into the rock hole from a distal open end of the sleeve (not shown).
- FIG. 7 to 10 illustrate a second embodiment of the grout delivery device, designated 26B.
- like features bear like designations.
- the shaft 30B is a hollow shaft, with a cylindrical bore 74 that extends along the length of the shaft, opening at the socket 36 and the first end (not shown).
- the device 26B has a nozzle body 38B which circumscribes the shaft, over the apertures 76 and is immovably fixed to the shaft in this position.
- the body has a single port, a grout port 48, which laterally and backwardly extends from the body.
- a check valve 78 is placed in the bore 74, behind the apertures 76, between the apertures and the first end.
- a grout passage section 80 of the bore is defined between the valve and the socket 36.
- This embodiment is used with a rock bolt 24B which has a hollow shank 52B which defines a tube 82.
- the tube opens at each end of the 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2018/05727 | 2018-08-28 | ||
ZA201805727 | 2018-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020047562A1 true WO2020047562A1 (en) | 2020-03-05 |
Family
ID=68766855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ZA2019/050053 WO2020047562A1 (en) | 2018-08-28 | 2019-08-27 | An integrated bolt rotator and grout nozzle device for use in a mechanised bolting application |
Country Status (2)
Country | Link |
---|---|
WO (1) | WO2020047562A1 (en) |
ZA (1) | ZA201905641B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021102485A1 (en) * | 2019-11-22 | 2021-05-27 | Innovative Mining Products (Pty) Ltd | Resin-grouted rock bolt assembly with an adapted sealing bush |
US11674390B2 (en) | 2019-11-22 | 2023-06-13 | Innovative Mining Products (Pty) Ltd | Resin-grouted rock bolt assembly with an adapted sealing bush |
EP4357532A1 (en) * | 2022-10-21 | 2024-04-24 | Spinnanker GmbH | Screw system for inserting a threaded rod in a base |
CN118148167A (en) * | 2024-05-09 | 2024-06-07 | 中铁建工集团第二建设有限公司 | Geotechnical engineering side slope anchoring supporting structure |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902727A1 (en) * | 1989-01-31 | 1990-08-02 | Willich F Gmbh & Co | Glass-fibre-reinforced, resin-bedded roof bolt |
DE19607988A1 (en) * | 1996-03-01 | 1997-09-04 | Reburg Patentverwertungs Gmbh | Coupling connecting rotary drilling drive to injector transferring mortar into rock anchor |
WO2001040628A1 (en) * | 1999-12-02 | 2001-06-07 | Sandvik Tamrock Oy | Arrangement for feeding bonding material |
WO2004055326A1 (en) * | 2002-12-17 | 2004-07-01 | Lms Geotechnical Pty Ltd | An apparatus and method to anchor a rock bolt |
WO2004099568A1 (en) * | 2003-05-12 | 2004-11-18 | Atlas Copco Rock Drills Ab | Device for rock bolting and for automized rock bolting and rock bolting |
ZA201207431B (en) | 2011-10-21 | 2013-05-29 | Innovative Mining Products (Pty) Ltd | A radially expansible rock bolt |
-
2019
- 2019-08-27 ZA ZA2019/05641A patent/ZA201905641B/en unknown
- 2019-08-27 WO PCT/ZA2019/050053 patent/WO2020047562A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3902727A1 (en) * | 1989-01-31 | 1990-08-02 | Willich F Gmbh & Co | Glass-fibre-reinforced, resin-bedded roof bolt |
DE19607988A1 (en) * | 1996-03-01 | 1997-09-04 | Reburg Patentverwertungs Gmbh | Coupling connecting rotary drilling drive to injector transferring mortar into rock anchor |
WO2001040628A1 (en) * | 1999-12-02 | 2001-06-07 | Sandvik Tamrock Oy | Arrangement for feeding bonding material |
WO2004055326A1 (en) * | 2002-12-17 | 2004-07-01 | Lms Geotechnical Pty Ltd | An apparatus and method to anchor a rock bolt |
WO2004099568A1 (en) * | 2003-05-12 | 2004-11-18 | Atlas Copco Rock Drills Ab | Device for rock bolting and for automized rock bolting and rock bolting |
ZA201207431B (en) | 2011-10-21 | 2013-05-29 | Innovative Mining Products (Pty) Ltd | A radially expansible rock bolt |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021102485A1 (en) * | 2019-11-22 | 2021-05-27 | Innovative Mining Products (Pty) Ltd | Resin-grouted rock bolt assembly with an adapted sealing bush |
US11661847B2 (en) | 2019-11-22 | 2023-05-30 | Innovative Mining Products (Pty) Ltd | Resin-grouted rock bolt assembly with an adapted sealing bush |
US11674390B2 (en) | 2019-11-22 | 2023-06-13 | Innovative Mining Products (Pty) Ltd | Resin-grouted rock bolt assembly with an adapted sealing bush |
EP4357532A1 (en) * | 2022-10-21 | 2024-04-24 | Spinnanker GmbH | Screw system for inserting a threaded rod in a base |
CN118148167A (en) * | 2024-05-09 | 2024-06-07 | 中铁建工集团第二建设有限公司 | Geotechnical engineering side slope anchoring supporting structure |
Also Published As
Publication number | Publication date |
---|---|
ZA201905641B (en) | 2022-08-31 |
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