WO2013104019A1 - A combination tool for installing and tensioning a cable bolt - Google Patents
A combination tool for installing and tensioning a cable bolt Download PDFInfo
- Publication number
- WO2013104019A1 WO2013104019A1 PCT/AU2013/000014 AU2013000014W WO2013104019A1 WO 2013104019 A1 WO2013104019 A1 WO 2013104019A1 AU 2013000014 W AU2013000014 W AU 2013000014W WO 2013104019 A1 WO2013104019 A1 WO 2013104019A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drive body
- drive
- tensioning
- receptacle
- cable bolt
- Prior art date
Links
- 238000009987 spinning Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 27
- 238000009412 basement excavation Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000037361 pathway Effects 0.000 claims description 2
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011435 rock Substances 0.000 description 9
- 238000005065 mining Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 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
-
- 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 tool for installing and tensioning a cable bolt or the like as used in the strengthening, support and stability of underground excavations.
- the present invention relates to a combination tool which can be used for both installing and tensioning flexible cable bolts and the like used for the support and stabilization of the walls and roofs of openings formed during underground mining operations and the like.
- excavation is usually performed by a miner or a boring machine and subterranean conveyor system.
- the boring machine provides a cutting head comprising a circular plate covered with disc cutlers. As the circular plate slowly rotates, the disc cutters slice into the coal or rock which falls onto the conveyor system.
- the conveyor system carries the coal or rock to the rear of the machine, and motors or hydraulic cylinders attached to the boring machine propel the machine forward a few feet at a time.
- a cable bolt includes a number of closely spaced wires which have a first end adapted for fitting into a bore hole, and a second end including a drive portion and a cylindrical sleeve, whereby the drive portion is adapted for engagement with an industry standard drill rig chuck or the like for installing by inserting and spinning the cable bolt into a drilled hole.
- the cylindrical sleeve includes a threaded external surface to receive a tensioning nut for tightening against an anchor plate so as to tension the cable bolt.
- a cable bolt of the foregoing type is usually installed by:
- the cable bolt is tensioned so that the strata surrounding the bolt hole is held in compression.
- Forming a bore hole is usually accomplished by use of a conventional rotary drill rig mounted to a boring machine behind the cutters, which bore into roof as the machine advances.
- the drill rods are removed and replaced with an installation socket or like device adapted to fit the drill rig chuck and engage the drive end of the cable for insertion and rotation of the cable to puncture and mix the separate resin and catalyst cartridges, and anchor the first end within the bore hole.
- the rig operator is required to remove the installation socket device and replace with a second socket device to rotate the tensioning nut and thereby tension the cable.
- any reduction in time required to install and tension a cable bolt would translate into a very significant cost saving in an overall mining operation particularly given the very large numbers of cable bolts required. It would therefore be advantageous both in safety and economy of scale to provide an efficient means for reducing operator time involved in changing tools for installation and tensioning a cable bolt.
- a further object of the present invention is to provide a practical means to help reduce time taken for installing and tensioning a cable bolt for supporting underground excavations and therefore work safety while minimizing labor costs associated with prior art methods of installation and tensioning of cable bolts.
- a combination tool for installation and tensioning a cable bolt in underground excavation works including: an outer drive body having a first end adapted for operable engagement with a drill rig chuck or like rotary drill rig, and an opposite drive receptacle end having a cut-out shaped opening forming a drive receptacle for releasably engaging a tensioning nut of the cable bolt in a tensioning condition, the first and second ends being interconnected by a wall wherein the outer drive body is at least partially hollow forming an internal chamber; an inner drive body slidably received within the internal chamber of the outer drive body whereby the inner drive body comprises a first end and opposite drive receptacle end interconnected by a wall, and wherein the drive receptacle end includes a cut-out shaped portion forming a drive receptacle for releasably engaging the drive portion of a cable bolt for installing the cable within a bore hole; a releasable holding
- the present invention represents an advance over the prior art because a single tool can be used to perform both (a) installing a cable bolt by inserting and spinning the cable bolt within a bore hole, and (b) tension the cable bolt by rotating a tensioning nut about a threaded sleeve once the cable bolt has been anchored within the bore hole by a quick setting resin.
- the present invention allows multiple steps with a single tool, the rate at which cable bolts can be installed is increased thereby improving work safety, and because a drill rig operator no longer needs to separately replace one device for installation with a second device for tensioning, the time taken to install a cable bolt effectively reduces labor costs of an overall mining or similar underground operation.
- the releasable holding means can include:
- the outer drive body can include a pair of oppositely disposed lateral cut out portions forming the recesses of the holding means, wherein the outer drive body further includes a pair of oppositely disposed longitudinal cut out guide portions each intersecting a respective cut out recess, and whereby the pair of longitudinal cut out portions form a pathway for slidably receiving the oppositely disposed guide pins of the inner drive body when the guide pins are released from a holding condition so that the inner drive body can be displaced within the chamber away from the second end of the outer drive body.
- a combination tool for installing and tensioning a cable bolt comprising:
- each drive body comprising a drive receptacle at one end, and the outer drive body having one end configured to mount a drill rig chuck or like device for rotating the outer drive body, the inner drive tool being slidably and substantially co-axially mounted within the outer drive body, the inner drive body being moveable relative to and substantially longitudinally within the outer drive body; and
- the holding means substantially maintains the drive receptacle of the inner drive body proximal the drive receptacle of the outer drive body for locating the drive receptacle of the inner drive body on a drive portion of the cable bolt for installing by inserting and spinning the cable within a bore hole
- the inner drive body and outer drive body can have longitudinally extending, substantially cylindrical bodies, which are open at least at one end.
- the holding means can include:
- the holding means can further include a longitudinal guide aperture which intersects a portion of the lateral recess, wherein when the holding means is released the longitudinal guide aperture slidably receives the guide pin of the inner drive body therein, whereby the inner drive body is slidably displaced within the outer drive body away from the drive receptacle of the outer drive body.
- the outer drive body can further include an inner shoulder located distal the drive receptacle for receiving a lower surface portion of the inner drive body in a seated condition when the holding means is released.
- the inner drive body can include a stop surface beneath the drive receptacle for seating on the inner shoulder of the outer drive body.
- figure 1 is an isometric view of an embodiment of the present invention
- figure 2 is an exploded isometric view of the device figure 1 ;
- figure 3 is a view, partly in section and partly in side elevation, illustrating the use of the device of figure 1 ;
- figure 4 is a further representation, part section and part side elevation, of the device in figure 1.
- the tool 1 for use in installing a cable bolt into a bore hole (not shown) by inserting and spinning the cable, and thereafter tensioning the cable bolt.
- the tool 1 includes an outer drive body 2 and an inner drive body 3, wherein the inner drive body is adapted to move within the outer body between an installation condition and a tensioning condition.
- the outer drive body 2 includes an upper drive receptacle end 120 and an opposite or lower open end 6 interconnected by a wall 12, whereby the lower end is adapted for receiving a drill rig or the like (not shown) for rotating the outer drive body.
- the outer drive body further includes a hollow chamber 4 (best seen in figures 3 and 4) between the drive receptacle end and lower opposite end.
- the inner drive body 3 is sized to fit substantially co-axially within the outer drive body to allow sliding movement of the inner drive body within the hollow chamber 4 relative to the outer drive body, between a tool installation condition (best seen in figures 1 and 3) and a tool tensioning condition (best seen in figure 4).
- the outer body 2 includes a drive receptacle 5 adjacent the drive receptacle end 120 comprising a shaped cut out portion adapted to engage with a tensioning nut 23 (refer figure 4) of the cable bolt in a tensioning position (figure 4).
- the lower end 6 of the outer drive body 2 forms a neck which is adapted for mounting or otherwise engaging with a conventional drill rig chuck (not shown) for advancing and rotation thereof.
- neck 6 of the outer drive body having mounted thereon a drive shaft 7.
- the drive receptacle end 120 and opposite end 6 of the outer drive body are interconnected by a wall 12 forming a substantially cylindrical body.
- the inner drive body 3 includes an upper drive receptacle end 121 and an opposite or lower open end 122 interconnected by a wall 123 forming a substantially cylindrical structure.
- the inner drive body includes a drive receptacle 8 adjacent the drive receptacle end comprising a shaped cut out portion for operatingly engaging with a drive portion 22 or the like of a cable bolt in an installation condition.
- the inner drive body also includes a pair of oppositely located guide pins 9 and 9a and a stop member 10 mounted to the body opposite the drive receptacle end by a pin 1 1.
- the tool 1 further includes a holding means comprising mating components on the outer drive body and the inner drive body.
- a holding means comprising mating components on the outer drive body and the inner drive body.
- guide pins 9 and 9a on the inner drive body 3, and guide apertures 13 and 13a respectively on the outer drive body 2 combine to hold the guide pins in recesses 14 and 14a in an installation condition.
- guide apertures 13 and 13a include a pair of oppositely disposed lateral recess portions 14 and 14a extending in opposite directions, and longitudinal recess openings 15 and 15a which intersect the lateral recess portion forming oppositely disposed seats 16 and 16a.
- the holding means is shown in a holding condition in which guide pins 9 and 9a are seated within lateral recess portions 14 and 14a in seats 16 and 16a.
- the drive receptacle 8 of the inner drive body 3 is shown in engagement with a drive end 22 of the cable bolt, and tensioning nut 23 of the cable bolt is shown in a substantially non-tensioned condition on threaded sleeve 40 (best seen in figure 4).
- a drill rig (not shown), connected to neck portion of the outer drive body 2, begins to advance and rotate the outer body 2, the direction of rotation maintains the guide pins 9 and 9a in a seated position within the lateral recesses 14 and 14a.
- the drill rig will rotate the outer drive body away from the direction of the lateral recesses, i.e. clockwise so that centrifugal forces from rotation maintain an opposite force on the guide pins to retain the guide pins in the recesses in a seated condition.
- the outer drive body spins or advances as urged by the drill rig (not shown)
- the inner drive body rotates in concert with rotation of the outer body, and while being maintained in a holding condition by the holding means, the drive receptacle of the inner drive body rotates the drive portion 22 and in turn advances and spins the cable within a bore hole (not shown).
- the drill rig During installation of a cable bolt, once the cable 25 has been advanced and rotated sufficiently to rupture and mix resin and catalyst cartridges placed within the bore hole (not shown), the drill rig maintains a force against the outer drive body for a period of time effective to maintain contact between roof plate 26 and ceiling of tunnel (not shown) and to allow setting of the resin and anchoring of one end of the cable within the bore hole. Once the resin is set, the cable bolt can be tensioned. Ordinarily tensioning of the cable would require a drill rig operator to manually remove an installation socket and replace with a second tensioning socket. Not only is this time consuming because an operator has minimal space to move in hence cannot easily remove and replace tools, but working safety may be compromised the longer it takes to undertake tensioning of the cable.
- Figure 4 shows the tool in a cable tensioning condition required by the present
- the inner drive body has been ejected from its holding condition by displacing the guide pins from seated locations, thereafte the inner body is slidably displaced within the chamber 4 of the outer drive body as guide pins allow slidable movement along longitudinal apertures 1 and 15a.
- the holding means has released the guide pins 9 and 9a (not shown) from the seated position in recesses 14 and 14a by spinning the outer body counter to the seated position. Once released from the seated position, the guide pins 9 and 9a extend into longitudinal guide apertures 15 and 15a respectively so that the inner drive body can slide away from the drive receptacle of the outer drive body and within the chamber 4.
- Outer drive body includes an internal annular shoulder 30 against which stop member 10 of the inner drive body is seated while the tool 1 is in a tensioning condition.
- the drive receptacle end 121 of the inner drive body is located within the chamber 4 remote from the drive receptacle 5 of the outer drive body 2 with stop member 10 seated against shoulder 30.
- the drive receptacle of the outer drive body engages the cable bolt tensioning nut 23.
- the outer drive body spins accordingly to wind the tensioning nut 23 on the threaded section 40 of the sleeve, thereby urging a domed washer 50 against an anchor plate 26, and in turn tensioning the cable to between , about 4 to 6 ton and improving compressive forces by the cable against the rock (not shown).
- each dependent claim is to be read as being within the scope of its parent claim or claims, in the sense that a dependent claim is not to be interpreted as infringed unless its parent claims are also infringed.
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)
- Earth Drilling (AREA)
Abstract
A combination tool (1 ) for inserting/spinning and tensioning a cable bolt comprising: an inner drive body (3) and an outer drive body (2), each drive body comprising a drive receptacle (5, 8) at one end, and the outer drive body (2) having one end (6) configured to mount a drill rig chuck or like device for rotating the tool, the inner drive body (3) being slidably and substantially co-axially mounted within the outer drive body (2); and a releasable holding means (9, 13, 14, 16) on the inner and outer drive bodies whereby the inner drive body (3) is moveable between: a holding condition in which the drive receptacle (8) of the inner drive body is located on a lock nut or the like for inserting and spinning the cable within a bore hole, and a released condition in which the drive receptacle (5) of the outer drive body can preferentially engage a lock nut for tensioning the cable bolt.
Description
Title: A combination Tool for installing and tensioning a cable bolt Field of the invention The present invention relates to a tool for installing and tensioning a cable bolt or the like as used in the strengthening, support and stability of underground excavations. In particular the present invention relates to a combination tool which can be used for both installing and tensioning flexible cable bolts and the like used for the support and stabilization of the walls and roofs of openings formed during underground mining operations and the like.
Background of the invention
In underground mining and tunnel construction, excavation is usually performed by a miner or a boring machine and subterranean conveyor system. The boring machine provides a cutting head comprising a circular plate covered with disc cutlers. As the circular plate slowly rotates, the disc cutters slice into the coal or rock which falls onto the conveyor system. The conveyor system carries the coal or rock to the rear of the machine, and motors or hydraulic cylinders attached to the boring machine propel the machine forward a few feet at a time.
It is well known that during underground excavation, the walls and roofs so formed must withstand tremendous pressures, and geological conditions often change very rapidly on the tunnel route particularly in the case of engineering tunnels giving rise to risks of tunnel collapse. A characteristic feature of tunnel collapse is that very little movement is required in the rock mass. Failure can occur as new surface is exposed by excavation of the opening. Hence as a boring machine advances and exposes new rock face for example, it is critical to stabilize the underground openings as soon as practicable for working safety of a crew.
Reinforcement such as cable bolts are widely used as secondary support close to the board face in underground mining to maintain safe working conditions for the crew. Cable bolts are installed within bore holes located in a predetermined pattern based on various geological conditions in the tunnel
Many different types of cable bolts have been produced in the past. Generally, a cable bolt includes a number of closely spaced wires which have a first end adapted for fitting into a bore hole, and a second end including a drive portion and a cylindrical sleeve, whereby the drive portion is adapted for engagement with an industry standard drill rig chuck or the like for installing by inserting and spinning the cable bolt into a drilled hole. The cylindrical sleeve includes a threaded external surface to receive a tensioning nut for tightening against an anchor plate so as to tension the cable bolt.
A cable bolt of the foregoing type is usually installed by:
(i) fomiing a bore hole by drilling into rock,
(ii) positioning a resin composition or quick setting adhesive principally in two- components including a chemical resin and catalyst, separately retained within a breakable cartridge, within the drilled bore hole,
(iii) installing the cable bolt by advancing and spinning the cable bolt so as to puncture the cartridge and mix the resin and catalyst components whereby the resin cures to secure the first end of the cable bolt in the hole, and
(iv) once set, the cable bolt is tensioned so that the strata surrounding the bolt hole is held in compression. Forming a bore hole is usually accomplished by use of a conventional rotary drill rig mounted to a boring machine behind the cutters, which bore into roof as the machine advances. Once a bore hole is made, the drill rods are removed and replaced with an installation socket or like device adapted to fit the drill rig chuck and engage the drive end of the cable for insertion and rotation of the cable to puncture and mix the separate resin and catalyst cartridges, and anchor the first end within the bore hole. Once the resin is set, the rig operator is required to remove the installation socket device and replace with a second socket device to rotate the tensioning nut and thereby tension the cable.
One particular drawback with installation of a cable bolt of the foregoing type is that different tools are required for installation of the cable, and subsequent tensioning of the cable. In a particularly confined space, a rig operator is therefore required to manually change tools between installation and tensioning. This is a time consuming task, which adds to labor costs and safety issues.
In terms of work safety, it is imperative to install reinforcement support such as cable bolts or the like as quickly as possible in new rock face which is exposed during excavation so that the bolts begin to support or knit the rock as soon as they are tensioned, i.e., the rock does not have time to begin to move before the bolt becomes effective.
Further, and in terms of labor cost, any reduction in time required to install and tension a cable bolt would translate into a very significant cost saving in an overall mining operation particularly given the very large numbers of cable bolts required. It would therefore be advantageous both in safety and economy of scale to provide an efficient means for reducing operator time involved in changing tools for installation and tensioning a cable bolt.
It is an object of the present invention to address one or more of the foregoing problems of the prior art or at least provides a useful alternative.
A further object of the present invention is to provide a practical means to help reduce time taken for installing and tensioning a cable bolt for supporting underground excavations and therefore work safety while minimizing labor costs associated with prior art methods of installation and tensioning of cable bolts.
The above discussion of background art is included to explain the context of the present invention. It is not to be taken as an admission that any material referred to was published, known or part of the common general knowledge in Australia or elsewhere at the priority date of any one of the claims of this specification.
Summary of the invention
In accordance with the invention there is provided a combination tool for installation and tensioning a cable bolt in underground excavation works, the tool including: an outer drive body having a first end adapted for operable engagement with a drill rig chuck or like rotary drill rig, and an opposite drive receptacle end having a cut-out shaped opening forming a drive receptacle for releasably engaging a tensioning nut of the
cable bolt in a tensioning condition, the first and second ends being interconnected by a wall wherein the outer drive body is at least partially hollow forming an internal chamber; an inner drive body slidably received within the internal chamber of the outer drive body whereby the inner drive body comprises a first end and opposite drive receptacle end interconnected by a wall, and wherein the drive receptacle end includes a cut-out shaped portion forming a drive receptacle for releasably engaging the drive portion of a cable bolt for installing the cable within a bore hole; a releasable holding means on the outer and inner drive bodies for releasably holding the inner drive body relative to the outer drive body within the chamber of the outer drive body in an installation condition, whereby in an installation condition the holding means substantially maintains the drive receptacle end of the inner drive body proximal the drive receptacle end of the outer drive body to allow operating engagement of the drive receptacle of the inner drive body with the drive portion of the cable, whereby the drive end, and consequently cable bolt, is urged to advance and spin within a bore hole by action of a drill rig against the outer drive body; and wherein in a tensioning condition the holding means releases the inner drive body from the holding condition to allow the inner drive body to slidably move within the chamber to a position such that the drive receptacle end of the inner drive body is distal the drive receptacle end of the outer drive body, thereby allowing operational engagement of the drive receptacle of the outer drive body with a tensioning nut of the cable bolt, whereby the tensioning nut is urged to advance about a threaded sleeve portion of the cable bolt with rotary action of the drill rig against the outer drive body to tension the cable.
The present invention represents an advance over the prior art because a single tool can be used to perform both (a) installing a cable bolt by inserting and spinning the cable bolt within a bore hole, and (b) tension the cable bolt by rotating a tensioning nut about a threaded sleeve once the cable bolt has been anchored within the bore hole by a quick setting resin.
Compared to the prior art, because the present invention allows multiple steps with a single tool, the rate at which cable bolts can be installed is increased thereby improving work safety, and because a drill rig operator no longer needs to separately replace one device for installation with a second device for tensioning, the time taken to install a cable bolt effectively reduces labor costs of an overall mining or similar underground operation.
The releasable holding means can include:
a pair of oppositely disposed recesses located in a portion of the wall of the outer drive body proximal the second end thereof; and
a pair of oppositely disposed guide pins located on part of the wall of the inner drive body, wherein in a holding condition the oppositely disposed guide pins engage within the oppositely disposed recesses, and whereby rotation of the outer drive body substantially retains the guide pins within the respective recesses. The outer drive body can include a pair of oppositely disposed lateral cut out portions forming the recesses of the holding means, wherein the outer drive body further includes a pair of oppositely disposed longitudinal cut out guide portions each intersecting a respective cut out recess, and whereby the pair of longitudinal cut out portions form a pathway for slidably receiving the oppositely disposed guide pins of the inner drive body when the guide pins are released from a holding condition so that the inner drive body can be displaced within the chamber away from the second end of the outer drive body.
In a related aspect of the present invention there is described a combination tool for installing and tensioning a cable bolt comprising:
an inner drive body and an outer drive body, each drive body comprising a drive receptacle at one end, and the outer drive body having one end configured to mount a drill rig chuck or like device for rotating the outer drive body, the inner drive tool being slidably and substantially co-axially mounted within the outer drive body, the inner drive body being moveable relative to and substantially longitudinally within the outer drive body; and
a releasable holding means on the inner and outer drive bodies whereby the inner drive body is moveable between:
a holding condition in which the holding means substantially maintains the drive receptacle of the inner drive body proximal the drive receptacle of the
outer drive body for locating the drive receptacle of the inner drive body on a drive portion of the cable bolt for installing by inserting and spinning the cable within a bore hole, and
a released condition whereby the inner drive body is released from a holding condition by the holding means and thereafter adapted for displacement within the outer body to a position remote from the drive receptacle of the outer drive body such that the drive receptacle of the outer drive body can preferentially, engage a tensioning nut of the cable bolt for tensioning the cable bolt. The inner drive body and outer drive body can have longitudinally extending, substantially cylindrical bodies, which are open at least at one end.
The holding means can include:
a lateral recess opening in the outer drive body; and
a mating guide pin on the inner drive body; and
wherein in a holding condition the guide pin is received in the lateral opening of the outer drive body and substantially biased to remain in the holding condition by rotation of the outer drive body in an opposing direction. The holding means can further include a longitudinal guide aperture which intersects a portion of the lateral recess, wherein when the holding means is released the longitudinal guide aperture slidably receives the guide pin of the inner drive body therein, whereby the inner drive body is slidably displaced within the outer drive body away from the drive receptacle of the outer drive body.
The outer drive body can further include an inner shoulder located distal the drive receptacle for receiving a lower surface portion of the inner drive body in a seated condition when the holding means is released. The inner drive body can include a stop surface beneath the drive receptacle for seating on the inner shoulder of the outer drive body.
For a better understanding of the invention, and to show how it may be carried into effect, embodiments of it are shown, by way of non-limiting example only, in the accompanying drawings. Brief description of the drawings
In the drawings:
figure 1 is an isometric view of an embodiment of the present invention;
figure 2 is an exploded isometric view of the device figure 1 ;
figure 3 is a view, partly in section and partly in side elevation, illustrating the use of the device of figure 1 ;
figure 4 is a further representation, part section and part side elevation, of the device in figure 1.
Detailed Description of preferred embodiments of the invention with reference to the drawings
Referring to the figures there is shown a combination tool 1 for use in installing a cable bolt into a bore hole (not shown) by inserting and spinning the cable, and thereafter tensioning the cable bolt. The tool 1 includes an outer drive body 2 and an inner drive body 3, wherein the inner drive body is adapted to move within the outer body between an installation condition and a tensioning condition.
The outer drive body 2 includes an upper drive receptacle end 120 and an opposite or lower open end 6 interconnected by a wall 12, whereby the lower end is adapted for receiving a drill rig or the like (not shown) for rotating the outer drive body. The outer drive body further includes a hollow chamber 4 (best seen in figures 3 and 4) between the drive receptacle end and lower opposite end. The inner drive body 3 is sized to fit substantially co-axially within the outer drive body to allow sliding movement of the inner drive body within the hollow chamber 4 relative to the outer drive body, between a tool installation condition (best seen in figures 1 and 3) and a tool tensioning condition (best seen in figure 4).
As seen in figures 1 and 2, the outer body 2 includes a drive receptacle 5 adjacent the drive receptacle end 120 comprising a shaped cut out portion adapted to engage with a
tensioning nut 23 (refer figure 4) of the cable bolt in a tensioning position (figure 4). The lower end 6 of the outer drive body 2 forms a neck which is adapted for mounting or otherwise engaging with a conventional drill rig chuck (not shown) for advancing and rotation thereof. Alternatively in figure 1 there is shown neck 6 of the outer drive body having mounted thereon a drive shaft 7. The drive receptacle end 120 and opposite end 6 of the outer drive body are interconnected by a wall 12 forming a substantially cylindrical body. In the wall 12 of the outer drive body 2 there is shown a pair of oppositely disposed guide apertures 13 and 13a Referring to figure 2, the inner drive body 3 includes an upper drive receptacle end 121 and an opposite or lower open end 122 interconnected by a wall 123 forming a substantially cylindrical structure. The inner drive body includes a drive receptacle 8 adjacent the drive receptacle end comprising a shaped cut out portion for operatingly engaging with a drive portion 22 or the like of a cable bolt in an installation condition. The inner drive body also includes a pair of oppositely located guide pins 9 and 9a and a stop member 10 mounted to the body opposite the drive receptacle end by a pin 1 1.
The tool 1 further includes a holding means comprising mating components on the outer drive body and the inner drive body. As best seen in figure 2, guide pins 9 and 9a on the inner drive body 3, and guide apertures 13 and 13a respectively on the outer drive body 2 combine to hold the guide pins in recesses 14 and 14a in an installation condition. As shown, guide apertures 13 and 13a include a pair of oppositely disposed lateral recess portions 14 and 14a extending in opposite directions, and longitudinal recess openings 15 and 15a which intersect the lateral recess portion forming oppositely disposed seats 16 and 16a.
Referring to figure 3, the holding means is shown in a holding condition in which guide pins 9 and 9a are seated within lateral recess portions 14 and 14a in seats 16 and 16a. In this condition, the drive receptacle 8 of the inner drive body 3 is shown in engagement with a drive end 22 of the cable bolt, and tensioning nut 23 of the cable bolt is shown in a substantially non-tensioned condition on threaded sleeve 40 (best seen in figure 4). As a drill rig (not shown), connected to neck portion of the outer drive body 2, begins to advance and rotate the outer body 2, the direction of rotation maintains the guide pins 9 and 9a in a seated position within the lateral recesses 14 and 14a. In this particular
embodiment with the lateral recesses 14 and 14a extending to the left and away from respective longitudinal guide apertures, the drill rig will rotate the outer drive body away from the direction of the lateral recesses, i.e. clockwise so that centrifugal forces from rotation maintain an opposite force on the guide pins to retain the guide pins in the recesses in a seated condition. When the outer drive body spins or advances as urged by the drill rig (not shown), the inner drive body rotates in concert with rotation of the outer body, and while being maintained in a holding condition by the holding means, the drive receptacle of the inner drive body rotates the drive portion 22 and in turn advances and spins the cable within a bore hole (not shown).
During installation of a cable bolt, once the cable 25 has been advanced and rotated sufficiently to rupture and mix resin and catalyst cartridges placed within the bore hole (not shown), the drill rig maintains a force against the outer drive body for a period of time effective to maintain contact between roof plate 26 and ceiling of tunnel (not shown) and to allow setting of the resin and anchoring of one end of the cable within the bore hole. Once the resin is set, the cable bolt can be tensioned. Ordinarily tensioning of the cable would require a drill rig operator to manually remove an installation socket and replace with a second tensioning socket. Not only is this time consuming because an operator has minimal space to move in hence cannot easily remove and replace tools, but working safety may be compromised the longer it takes to undertake tensioning of the cable.
Figure 4 shows the tool in a cable tensioning condition required by the present
combination tool to apply tension to the cable. As shown in figure 4, the inner drive body has been ejected from its holding condition by displacing the guide pins from seated locations, thereafte the inner body is slidably displaced within the chamber 4 of the outer drive body as guide pins allow slidable movement along longitudinal apertures 1 and 15a. To achieve this condition the holding means has released the guide pins 9 and 9a (not shown) from the seated position in recesses 14 and 14a by spinning the outer body counter to the seated position. Once released from the seated position, the guide pins 9 and 9a extend into longitudinal guide apertures 15 and 15a respectively so that the inner drive body can slide away from the drive receptacle of the outer drive body and within the chamber 4. Outer drive body includes an internal annular shoulder 30 against which stop member 10 of the inner drive body is seated while the tool 1 is in a tensioning condition.
In the tool tensioning condition as shown in figure 4, the drive receptacle end 121 of the inner drive body is located within the chamber 4 remote from the drive receptacle 5 of the outer drive body 2 with stop member 10 seated against shoulder 30. In this released condition the drive receptacle of the outer drive body engages the cable bolt tensioning nut 23. When a drill rig (not shown) starts to rotate, the outer drive body spins accordingly to wind the tensioning nut 23 on the threaded section 40 of the sleeve, thereby urging a domed washer 50 against an anchor plate 26, and in turn tensioning the cable to between , about 4 to 6 ton and improving compressive forces by the cable against the rock (not shown).
While the present invention has been described with reference to a few specific embodiments, the description is illustrative of the invention and is not to be construed as limiting the invention. Various modifications may occur to those skilled in the art without departing from the true spirit and scope of the invention as defined by the appended claims.
A reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that the referenced prior art forms part of the common general knowledge, whether in Australia or elsewhere.
Throughout this specification, the words "comprise", "comprised", "comprising" and "comprises" are to be taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
In the claims, each dependent claim is to be read as being within the scope of its parent claim or claims, in the sense that a dependent claim is not to be interpreted as infringed unless its parent claims are also infringed.
Claims
1. A combination tool for installing and tensioning a cable bolt comprising:
an inner drive body and an outer drive body, each drive body comprising a drive receptacle at one end, and the outer drive body having one end configured to mount a drill rig chuck or like device for rotating the outer drive body, the inner drive tool being slidably and substantially co-axially mounted within the outer drive body, the inner drive body being moveable relative to and substantially longitudinally within the outer drive body; and
a releasable holding means on the inner and outer drive bodies whereby the inner drive body is moveable between:
a holding condition in which the holding means substantially maintains the drive receptacle of the inner drive body proximal the drive receptacle of the outer drive body for locating the drive receptacle of the inner drive body on a drive portion of the cable bolt for installing by inserting and spinning the cable within a bore hole, and 1
a released condition whereby the inner drive body is released from a holding condition by the holding means and thereafter adapted for displacement within the outer body to a position remote from the drive receptacle of the outer drive body such that the drive receptacle of the outer drive body can preferentially engage a tensioning nut of the cable bolt for tensioning the cable bolt.
2. A combination tool for installation and tensioning a cable bolt according to claim 1 wherein the inner drive body and outer drive body have longitudinally extending, substantially cylindrical bodies, which are open at least at one end.
3. A combination tool for installation and tensioning a cable bolt according to claim 1 wherein the holding means includes:
a lateral recess opening in the outer drive body; and
a mating guide pin on the inner drive body; and
wherein in a holding condition the guide pin is received in the lateral opening of the outer drive body and substantially biased to remain in the holding condition by rotation of the outer drive body in an opposing direction.
4. A combination tool for installation and tensioning a cable bolt according to claim 3 wherein the holding means further includes a longitudinal guide aperture which intersects a portion of the lateral recess, wherein when the holding means is released the longitudinal guide aperture slidably receives the guide pin of the inner drive body therein, whereby the inner drive body is slidably displaced within the outer drive body away from the drive receptacle of the outer drive body.
5. A combination tool for installation and tensioning a cable bolt according to claim 1 wherein the outer drive body further includes an inner shoulder located distal the drive receptacle for receiving a lower surface portion of the inner drive body in a seated condition when the holding means is released.
6. A combination tool for installation and tensioning a cable bolt according to claim 5 wherein the inner drive body includes a stop surface beneath the drive receptacle for seating on the inner shoulder of the outer drive body.
7. A combination tool for installation and tensioning a cable bolt in underground excavation works, the tool including: an outer drive body having a first end adapted for operable engagement with a drill rig chuck or like rotary drill rig, and an opposite drive receptacle end having a cut-out shaped opening forming a drive receptacle for releasably engaging a tensioning nut of the cable bolt in a tensioning condition, the first and second ends being interconnected by a wall wherein the outer drive body is at least partially hollow forming an internal chamber; an inner drive body slidably received within the internal chamber of the outer drive body whereby the inner drive body comprises a first end and opposite drive receptacle end interconnected by a wall, and wherein the drive receptacle end includes a cut-out shaped portion forming a drive receptacle for releasably engaging the drive portion of a cable bolt for installing the cable within a bore hole; a releasable holding means on the outer and inner drive bodies for releasably holding the inner drive body relative to the outer drive body within the chamber of the outer drive body in an installation condition, whereby in an installation condition the holding means substantially maintains the drive receptacle end of the inner drive body proximal the drive receptacle end of the outer drive body to allow operating engagement of the drive receptacle of the inner drive body with the drive portion of the cable, whereby the drive end, and consequently cable bolt, is urged to advance and spin within a bore hole by action of a drill rig against the outer drive body; and wherein in a tensioning condition the holding means releases the inner drive body from the holding condition to allow the inner drive body to slidably move within the chamber to a position such that the drive receptacle end of the inner drive body is distal the drive receptacle end of the outer drive body, thereby allowing operational engagement of the drive receptacle of the outer drive body with a tensioning nut of the cable bolt, whereby the tensioning nut is urged to advance about a threaded sleeve portion of the cable bolt with rotary action of the drill rig against the outer drive body to tension the cable.
8. A combination tool for installation and tensioning a cable bolt according to claim 7 wherein the releasablc holding means includes:
a pair of oppositely disposed recesses located in a portion of the wall of the outer drive body proximal the second end thereof; and
a pair of oppositely disposed guide pins located on part of the wall of the inner drive body, wherein in a holding condition the oppositely disposed guide pins engage within the oppositely disposed recesses, and whereby rotation of the outer drive body substantially retains the guide pins within the respective recesses.
9. A combination tool for installation and tensioning a cable bolt according to claim 8 wherein the outer drive body includes a pair of oppositely disposed lateral cut out portions forming the recesses of the holding means, wherein the outer drive body further includes a pair of oppositely disposed longitudinal cut out guide portions each intersecting a respective cut out recess, and whereby the pair of longitudinal cut out portions form a pathway for slidably receiving the oppositely disposed guide pins of the inner drive body when the guide pins are released from a holding condition so that the inner drive body can be displaced within the chamber away from the second end of the outer drive body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2013209272A AU2013209272A1 (en) | 2012-01-10 | 2013-01-10 | A combination tool for installing and tensioning a cable bolt |
| AU2017272324A AU2017272324A1 (en) | 2012-01-10 | 2017-12-08 | A combination tool for installing and tensioning a cable bolt |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2012900096A AU2012900096A0 (en) | 2012-01-10 | "Installation of Rock Bolts" | |
| AU2012900096 | 2012-01-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013104019A1 true WO2013104019A1 (en) | 2013-07-18 |
Family
ID=48780969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2013/000014 WO2013104019A1 (en) | 2012-01-10 | 2013-01-10 | A combination tool for installing and tensioning a cable bolt |
Country Status (2)
| Country | Link |
|---|---|
| AU (2) | AU2013209272A1 (en) |
| WO (1) | WO2013104019A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016155832A1 (en) | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Multi-functional connector, drill head, and method |
| WO2016155833A1 (en) | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Extendable cylinder, drill head, and method |
| WO2017031511A3 (en) * | 2015-08-18 | 2017-07-06 | Ncm Innovations (Ptv) Ltd | Actuator for a reactionless rock bolt tensioner |
| EP3218579A4 (en) * | 2014-11-12 | 2018-10-03 | DSI Underground IP Holdings Luxembourg S.à r.L. | Drive assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286482A (en) * | 1977-05-04 | 1981-09-01 | Bwz Berg-Und Industrietechnik Gmbh | Device for positioning anchorage means |
-
2013
- 2013-01-10 AU AU2013209272A patent/AU2013209272A1/en not_active Abandoned
- 2013-01-10 WO PCT/AU2013/000014 patent/WO2013104019A1/en active Application Filing
-
2017
- 2017-12-08 AU AU2017272324A patent/AU2017272324A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4286482A (en) * | 1977-05-04 | 1981-09-01 | Bwz Berg-Und Industrietechnik Gmbh | Device for positioning anchorage means |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3218579A4 (en) * | 2014-11-12 | 2018-10-03 | DSI Underground IP Holdings Luxembourg S.à r.L. | Drive assembly |
| WO2016155832A1 (en) | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Multi-functional connector, drill head, and method |
| WO2016155833A1 (en) | 2015-04-02 | 2016-10-06 | Sandvik Intellectual Property Ab | Extendable cylinder, drill head, and method |
| CN107407135A (en) * | 2015-04-02 | 2017-11-28 | 山特维克知识产权股份有限公司 | Multifrnction connector, drill bit and method |
| RU2677728C1 (en) * | 2015-04-02 | 2019-01-21 | Сандвик Интеллекчуал Проперти Аб | Multifunctional connector, drill head and method |
| CN107407135B (en) * | 2015-04-02 | 2019-10-01 | 山特维克知识产权股份有限公司 | Multifrnction connector, drill bit and method |
| WO2017031511A3 (en) * | 2015-08-18 | 2017-07-06 | Ncm Innovations (Ptv) Ltd | Actuator for a reactionless rock bolt tensioner |
| AU2016308437B2 (en) * | 2015-08-18 | 2021-02-04 | Epiroc Drilling Tools Ab | Actuator for a reactionless rock bolt tensioner |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2017272324A1 (en) | 2018-01-18 |
| AU2013209272A1 (en) | 2014-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2017272324A1 (en) | A combination tool for installing and tensioning a cable bolt | |
| US9175561B2 (en) | Resin injection apparatus for drilling apparatus for installing a ground anchor | |
| US7963726B2 (en) | Plastic rock-bolt or dowel | |
| CN101109276A (en) | Rock bolt | |
| KR20070003850A (en) | Single pass drilling apparatus, use a one-piece drill bit, method and rock bolt for single pass rock bolting | |
| US8770323B2 (en) | Apparatus and method for installing ground anchoring systems | |
| DE102006011652B4 (en) | Two-step hollow-bar composite anchor for adhesive cartridges and adhesive granules | |
| AU2008216929B2 (en) | A drill bit and a single drilling apparatus | |
| DE10321175B3 (en) | Injection ground anchor, to stabilize walls in mining and tunneling, has an inner channel with at least one chamber to hold the mixed cement to be pressed out into the borehole | |
| KR101804854B1 (en) | Puncing machine for multistage method of straight punching steel pipe and construction method thereof | |
| WO2012167308A1 (en) | Improvements in self-drilling rock bolts | |
| US8302706B1 (en) | Apparatus and method for installing ground anchoring systems | |
| US8950511B2 (en) | Apparatus and method for installing ground anchoring systems | |
| CA2867808C (en) | Roof bolt installation tool | |
| US8235147B1 (en) | Apparatus and method for installing ground anchoring systems | |
| AU2003230001B2 (en) | Roof bolts for use in mines, a method for their production and a method for their installation | |
| JP7417355B2 (en) | Bearing plate installation surface cutting and polishing method and equipment used therefor | |
| CN109441514B (en) | Wing type anchor rod | |
| AU5934099A (en) | Resin injection system | |
| CN110952921A (en) | Rock drilling rig, rock drilling apparatus and method of reinforcing a rock surface | |
| CN113090305B (en) | Anchor bolt support construction method | |
| AU2007100836A4 (en) | Improved rock bolt | |
| WO2000008304A1 (en) | Rock bolting method and apparatus | |
| EP0315743B1 (en) | Method for making a tunnel or gallery, and tunneling machine for carrying out the method | |
| CN102144072A (en) | Feed mechanism for drilling systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13735780 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2013209272 Country of ref document: AU Date of ref document: 20130110 Kind code of ref document: A |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 13735780 Country of ref document: EP Kind code of ref document: A1 |