US20120177448A1 - Grout delivery system for a rock bolt - Google Patents
Grout delivery system for a rock bolt Download PDFInfo
- Publication number
- US20120177448A1 US20120177448A1 US13/262,707 US200913262707A US2012177448A1 US 20120177448 A1 US20120177448 A1 US 20120177448A1 US 200913262707 A US200913262707 A US 200913262707A US 2012177448 A1 US2012177448 A1 US 2012177448A1
- Authority
- US
- United States
- Prior art keywords
- aperture
- grout
- opening
- bearing plate
- body portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000011440 grout Substances 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 title claims abstract description 33
- 210000002435 tendon Anatomy 0.000 claims abstract description 31
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000005755 formation reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- This invention relates, generally, to the delivery of grout to a rock support tendon and more particularly is concerned with a device to assist in delivering grout to a drill hole in which a rock support tendon is to be anchored.
- rock support tendon includes, without being limited, a rock bolt, a cable anchor and similar support devices.
- the grouting of rock support tendons is a widespread practice.
- the grout protects the support tendons from any ground water which may be present and which could cause the support tendons to corrode and, secondly, the support performance of the support tendons is enhanced for the grouting increases the capability of the support tendons to resist shear forces in the surrounding rock.
- One system in use employs a first tube for delivering the grout to the drill hole and a second tube to allow air to escape from the drill hole. Ends of the tubes protrude into a working place at which the rock support tendon is installed and are subject to blast damage—a factor which can make grouting difficult or impossible.
- An object of the present invention is to provide a device which facilitates delivery of a grout to a drill hole and which, to a substantial extent, is protected against damage of the aforementioned kind.
- the invention provides a grout delivery device which includes a body which defines an internal volume, opposing first and second apertures in the body, in communication with the volume, through which a rock support tendon extends, and a grout formation on the body for connection to a grout source.
- the body is at least partly flexible
- the body may have a first body portion in which the first aperture is located and a second body portion in which the second aperture is located.
- the second body portion may be movable relative to the first body portion at least to a limited extent.
- the internal volume may be in the nature of a passage or chamber or a similar space which is at least partly enclosed.
- the flexibility of the body may be achieved in any appropriate way. For example different portions of the body may be made from different materials. Another possibility is for the body to be made with one or more lines of weakness which facilitate flexing of the body. A third possibility is for the body to be formed with formations in the nature of a bellows or the like. These types of construction are exemplary only and are non-limiting.
- the formation, for connection to the grout source, is preferably located on the first body portion.
- the first body portion is preferably bulbous.
- An outer surface of the first body portion, surrounding the first aperture, is preferably convex or semi-spherical, conical or the like.
- a cross-sectional dimension of the first body portion measured between opposing points on the outer surface in a direction which is transverse to an axis of the first aperture, may increase in a direction away from a mouth of the first aperture.
- the second body portion may be substantially tubular.
- a section of the body between the first body portion and the second body portion may be slightly flared i.e. of decreasing cross-section from the bulbous first body portion to the tubular second body portion.
- the formation for connection to the grout source may be in the nature of a spigot and may include a formation which facilitates engagement of the spigot with an opening, in a member such as a bearing plate, through which the spigot is passed.
- the invention also extends to an assembly of a device of the aforementioned kind and a bearing plate which includes a central opening which is aligned with the first aperture of the device and a second opening through which the grout formation of the device passes and, preferably, with which the grout formation is engaged.
- a rock support tendon may extend through the first and second apertures and through the central opening of the bearing plate.
- a seal may be provided at an interface of the device and the rock support tendon in the region of the first aperture.
- the seal may be of any appropriate kind and, by way of example only, may be constituted by a washer of a flexible material such as rubber which closely surrounds the rock support tendon and which engages with an annular gap between the first body portion and the tendon.
- the body can be formed with a small collar, which protrudes into the volume, and which closely surrounds an adjacent surface of the tendon.
- the bearing plate could have any suitable shape and, for example, is domed or flat or semi-conical.
- the device may be used in different ways.
- an elongate tube is engaged with the body in direct communication with the second aperture.
- FIG. 1 is a side view of a device according to the invention
- FIG. 2 shows the device in perspective
- FIG. 3 is a cross-sectional view, from one side, of the device shown in FIG. 1 ;
- FIG. 4 shows, in cross-section, the device engaged with a rock support tendon, in one mode of use
- FIG. 5 shows the device used with a rock support tendon in a different mode of use
- FIG. 6 shows the device when used with a cable anchor
- FIGS. 7 and 8 are perspective and cross-sectional views respectively of a device according to a different form of the invention.
- FIGS. 1 , 2 and 3 of the accompanying drawings are side, perspective and cross-sectional views respectively of a device 10 used for delivering grout to a rock support tendon, according to the invention.
- the device includes a body 12 formed by a first body portion 14 and a second body portion 16 .
- the body encloses an internal volume 18 , in the nature of a chamber.
- the first body portion 14 is bulbous and has a convex or semi-spherical outer surface 20 .
- a first aperture 22 is centrally positioned in the convex surface.
- the second body portion 16 is formed by a short tube 24 which terminates in a second aperture 26 which directly opposes the first aperture.
- An intermediate section 28 between the body portions is flared and reduces in cross-section from the bulbous first body portion to the tubular second body portion.
- the first body portion 14 has a region 30 which is formed with ribs which impart to the region a bellows-type appearance.
- the region 30 is flexible, at least to a limited extent, and the first body portion can thus be moved relative to the second body portion to some extent.
- the body it is desirable for the body to be flexible, at least to a limited extent, for reasons which are described hereinafter.
- This flexibility can be achieved using any suitable technique and the scope of the invention is not limited to the use of the bellows-like strucutre.
- the body could be made from one or more parts and the region 30 or the flared section 28 could be made from a softer and more flexible material than remaining portions of the body.
- Other approaches to achieve this desired property of flexibility are of course possible e.g. by forming appropriate sections of the body with lines of weakness which promote bending or flexing of the body.
- an inwardly extending collar 34 is positioned at a rim of the first aperture and extends into the volume 18 .
- a small spigot 38 is positioned on the outer surface 20 .
- the spigot is to one side of the first aperture and has a frusto-conical leading end 40 followed by a small shoulder 42 .
- a passage 44 extends through the spigot.
- FIG. 4 illustrates, in cross-section and from one side, one way of using the device 10 .
- a rock support tendon 46 has an elongate rigid shank 50 which extends through the opposing first and second apertures 22 and 26 .
- a bearing plate 52 is passed onto the shank over the convex outer surface 20 of the bulbous first portion.
- the bearing plate has a domed central area 54 which is sized to fit closely over the convex surface 20 .
- the shank extends through a centrally positioned opening 56 in the bearing plate.
- a shaped washer 58 as is known in the art, is placed over the shank and this is followed by a nut 60 which is threadedly engaged with a protruding end 62 of the shank.
- the bearing plate is formed with a small opening 64 and the spigot 38 of the device is passed through this opening.
- the shoulder 42 abuts and engages with a portion of the outer surface of the bearing plate which surrounds the opening.
- the shank extends through the tubular second portion 24 into a drill hole 70 formed in a body of rock 74 .
- An outer edge 76 of the bearing plate abuts a surface of a rock face 78 surrounding the drill hole 70 .
- the device 10 can be used in two ways, at least, depending on the nature of the rock support tendon with which the device is engaged.
- a tube 80 is engaged with a leading end of the tubular second portion so that the second aperture 26 is in direct communication with an interior of the tube.
- the tube can be clamped or otherwise fixed to the tubular second portion.
- the tube extends into the hole 70 to a required extent.
- Grout from a grout delivery system, not shown, can then be injected into the passage 44 in the interior of the spigot.
- the grout flows into the volume 18 and then passes into an elongate annular volume 82 which surrounds the shank and which is bounded by the inner surface of the tube.
- As the grout advances air is expelled from the drill hole, travelling on an outer side of the tube.
- the air eventually reaches atmosphere through paths which are formed on an outer side of the device 10 .
- the shank, designated 50 A is formed with an elongate, axially extending, air passage 84 .
- the tube 80 is not used.
- grout When grout is injected into the volume 18 it emerges from the second aperture 26 and fills an annular gap 86 between an outer surface of the shank 50 A and an opposing inner surface of the drill hole. Air trapped inside the drill hole can escape, as the grout advances, by entering a mouth of the passage 84 which is located at a far end of the shank. When grout starts leaving the passage 84 it is evident to an operator that the drill hole has been completely grouted.
- the rock face 78 is generally perpendicular to the longitudinal direction of the drill hole. This is not necessarily the case. In many applications, particularly in arduous underground conditions, the rock face is inclined to the axial direction of the hole. Clearly, the orientation of the rock support tendon is determined by the hole direction. Similarly, the orientation of the bearing plate is determined by the orientation of the rock face surrounding the mouth of the drill hole. It is for this reason that a degree of flexibility of the body of the device is required.
- the tubular second portion is inserted into the drill hole and is therefore not able to be moved to any meaningful extent.
- the bulbous first portion which is captured by the domed bearing plate must be movable, together with the bearing plate, relatively to the rock support tendon. The bellows-like region 30 allows this movement to take place.
- FIG. 6 shows the use of the device with a tendon 46 A which includes an elongate, slightly flexible, cable 50 B, and not a rigid shank.
- An end 90 of the cable projects from a mouth of a drill hole 70 formed in a rock body 74 , and passes through a volume 18 inside a device 10 A which is similar to the device 10 , but which includes an additional tubular spigot 98 .
- Other parts of the device 10 A which are the same as parts of the device 10 , bear similar reference numbers.
- the device 10 A is located inside a bearing plate 52 in that it has an opening 100 through which the spigot 98 extends.
- a breather tube 102 extends through the spigot 98 , and the volume 18 , into the drill hole 70 and, alongside the cable 50 B, to an inner end of the drill hole.
- a barrel 106 is passed onto the end 90 and a wedge 108 is engaged with the end 90 and the barrel, which bears against an outer face of the bearing plate 52 .
- These components are used to tension the cable, as is known in the art.
- Grout is injected into the drill hole through the spigot 44 and fills the annular space between the cable and a wall of the drill hole. Air is expelled through the breather tube 102 .
- FIGS. 7 and 8 show another device 10 B according to the invention in perspective and in cross-section respectively.
- the device has a body 12 B with a first, frusto-conical, portion 14 B and a second, tubular, portion 16 B.
- the portion 14 B has a plurality of apertures 112 , and two formations 98 B and 44 B which correspond to, and which perform the same functions as, the spigots 98 and 44 respectively.
- the apertures 112 weaken the body and allow for a degree of relative movement between the body portions 14 B and 16 B.
- the device 10 B is used in the same way as the device 10 A, but preferably with a bearing plate of a corresponding shape i.e. not as domed as the bearing plate 52 .
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A grout delivery device which includes a body which defines an internal volume (18), opposing first (34) and second (26) apertures in the body, in communication with the volume, through which a rock support tendon (50) extends, and a grout formation (44) on the body for connection to a grout source.
Description
- This invention relates, generally, to the delivery of grout to a rock support tendon and more particularly is concerned with a device to assist in delivering grout to a drill hole in which a rock support tendon is to be anchored.
- As used herein “grout” includes a cementitious mixture and any other settable mixture which can be employed to anchor a rock support tendon in position, and “rock support tendon” includes, without being limited, a rock bolt, a cable anchor and similar support devices.
- The grouting of rock support tendons is a widespread practice. The grout protects the support tendons from any ground water which may be present and which could cause the support tendons to corrode and, secondly, the support performance of the support tendons is enhanced for the grouting increases the capability of the support tendons to resist shear forces in the surrounding rock.
- When a rock support tendon is grouted in a drill hole, provision must be made for air which is trapped in the drill hole to escape to atmosphere. One system in use employs a first tube for delivering the grout to the drill hole and a second tube to allow air to escape from the drill hole. Ends of the tubes protrude into a working place at which the rock support tendon is installed and are subject to blast damage—a factor which can make grouting difficult or impossible.
- In a second approach, of which the applicant is aware, use is made of a hollow spherical device which is seated on an outer side of a bearing plate or washer which is engaged with a protruding end of the rock support tendon. Grout is delivered to the drill hole through the hollow interior of the device. The spherical device is however also exposed to the workplace and can therefore be damaged by blasting or by moving machinery.
- An object of the present invention is to provide a device which facilitates delivery of a grout to a drill hole and which, to a substantial extent, is protected against damage of the aforementioned kind.
- The invention provides a grout delivery device which includes a body which defines an internal volume, opposing first and second apertures in the body, in communication with the volume, through which a rock support tendon extends, and a grout formation on the body for connection to a grout source.
- Preferably the body is at least partly flexible
- The body may have a first body portion in which the first aperture is located and a second body portion in which the second aperture is located. The second body portion may be movable relative to the first body portion at least to a limited extent.
- The internal volume may be in the nature of a passage or chamber or a similar space which is at least partly enclosed.
- The flexibility of the body may be achieved in any appropriate way. For example different portions of the body may be made from different materials. Another possibility is for the body to be made with one or more lines of weakness which facilitate flexing of the body. A third possibility is for the body to be formed with formations in the nature of a bellows or the like. These types of construction are exemplary only and are non-limiting.
- The formation, for connection to the grout source, is preferably located on the first body portion.
- The first body portion is preferably bulbous.
- An outer surface of the first body portion, surrounding the first aperture, is preferably convex or semi-spherical, conical or the like. Thus a cross-sectional dimension of the first body portion measured between opposing points on the outer surface in a direction which is transverse to an axis of the first aperture, may increase in a direction away from a mouth of the first aperture.
- The second body portion may be substantially tubular. A section of the body between the first body portion and the second body portion may be slightly flared i.e. of decreasing cross-section from the bulbous first body portion to the tubular second body portion.
- The formation for connection to the grout source may be in the nature of a spigot and may include a formation which facilitates engagement of the spigot with an opening, in a member such as a bearing plate, through which the spigot is passed.
- The invention also extends to an assembly of a device of the aforementioned kind and a bearing plate which includes a central opening which is aligned with the first aperture of the device and a second opening through which the grout formation of the device passes and, preferably, with which the grout formation is engaged.
- A rock support tendon may extend through the first and second apertures and through the central opening of the bearing plate. A seal may be provided at an interface of the device and the rock support tendon in the region of the first aperture. The seal may be of any appropriate kind and, by way of example only, may be constituted by a washer of a flexible material such as rubber which closely surrounds the rock support tendon and which engages with an annular gap between the first body portion and the tendon. Alternative the body can be formed with a small collar, which protrudes into the volume, and which closely surrounds an adjacent surface of the tendon.
- The bearing plate could have any suitable shape and, for example, is domed or flat or semi-conical.
- The device may be used in different ways. In one form of the invention an elongate tube is engaged with the body in direct communication with the second aperture.
- The invention is further described by way of examples with reference to the accompanying drawings in which:
-
FIG. 1 is a side view of a device according to the invention; -
FIG. 2 shows the device in perspective; -
FIG. 3 is a cross-sectional view, from one side, of the device shown inFIG. 1 ; -
FIG. 4 shows, in cross-section, the device engaged with a rock support tendon, in one mode of use; -
FIG. 5 shows the device used with a rock support tendon in a different mode of use, -
FIG. 6 shows the device when used with a cable anchor; and -
FIGS. 7 and 8 are perspective and cross-sectional views respectively of a device according to a different form of the invention. -
FIGS. 1 , 2 and 3 of the accompanying drawings are side, perspective and cross-sectional views respectively of adevice 10 used for delivering grout to a rock support tendon, according to the invention. - The device includes a
body 12 formed by afirst body portion 14 and asecond body portion 16. - The body encloses an
internal volume 18, in the nature of a chamber. - The
first body portion 14 is bulbous and has a convex or semi-sphericalouter surface 20. Afirst aperture 22 is centrally positioned in the convex surface. - The
second body portion 16 is formed by ashort tube 24 which terminates in asecond aperture 26 which directly opposes the first aperture. Anintermediate section 28 between the body portions is flared and reduces in cross-section from the bulbous first body portion to the tubular second body portion. - As is evident particularly from
FIG. 3 thefirst body portion 14 has aregion 30 which is formed with ribs which impart to the region a bellows-type appearance. As a consequence theregion 30 is flexible, at least to a limited extent, and the first body portion can thus be moved relative to the second body portion to some extent. - It is desirable for the body to be flexible, at least to a limited extent, for reasons which are described hereinafter. This flexibility can be achieved using any suitable technique and the scope of the invention is not limited to the use of the bellows-like strucutre. For example the body could be made from one or more parts and the
region 30 or the flaredsection 28 could be made from a softer and more flexible material than remaining portions of the body. Other approaches to achieve this desired property of flexibility are of course possible e.g. by forming appropriate sections of the body with lines of weakness which promote bending or flexing of the body. - In this example of the invention (refer to
FIG. 3 ) an inwardly extendingcollar 34 is positioned at a rim of the first aperture and extends into thevolume 18. - A
small spigot 38 is positioned on theouter surface 20. The spigot is to one side of the first aperture and has a frusto-conical leadingend 40 followed by asmall shoulder 42. Apassage 44 extends through the spigot. -
FIG. 4 illustrates, in cross-section and from one side, one way of using thedevice 10. A rock support tendon 46 has an elongaterigid shank 50 which extends through the opposing first andsecond apertures plate 52 is passed onto the shank over the convexouter surface 20 of the bulbous first portion. The bearing plate has a domedcentral area 54 which is sized to fit closely over theconvex surface 20. The shank extends through a centrally positionedopening 56 in the bearing plate. A shapedwasher 58, as is known in the art, is placed over the shank and this is followed by anut 60 which is threadedly engaged with aprotruding end 62 of the shank. - The bearing plate is formed with a
small opening 64 and thespigot 38 of the device is passed through this opening. Theshoulder 42 abuts and engages with a portion of the outer surface of the bearing plate which surrounds the opening. - The shank extends through the tubular
second portion 24 into adrill hole 70 formed in a body ofrock 74. Anouter edge 76 of the bearing plate abuts a surface of arock face 78 surrounding thedrill hole 70. - The
device 10 can be used in two ways, at least, depending on the nature of the rock support tendon with which the device is engaged. In one mode of use atube 80 is engaged with a leading end of the tubular second portion so that thesecond aperture 26 is in direct communication with an interior of the tube. The tube can be clamped or otherwise fixed to the tubular second portion. The tube extends into thehole 70 to a required extent. Grout from a grout delivery system, not shown, can then be injected into thepassage 44 in the interior of the spigot. The grout flows into thevolume 18 and then passes into an elongateannular volume 82 which surrounds the shank and which is bounded by the inner surface of the tube. As the grout advances air is expelled from the drill hole, travelling on an outer side of the tube. The air eventually reaches atmosphere through paths which are formed on an outer side of thedevice 10. - In a second mode of use, illustrated in
FIG. 5 , the shank, designated 50A, is formed with an elongate, axially extending,air passage 84. In this mode of use thetube 80 is not used. When grout is injected into thevolume 18 it emerges from thesecond aperture 26 and fills anannular gap 86 between an outer surface of theshank 50A and an opposing inner surface of the drill hole. Air trapped inside the drill hole can escape, as the grout advances, by entering a mouth of thepassage 84 which is located at a far end of the shank. When grout starts leaving thepassage 84 it is evident to an operator that the drill hole has been completely grouted. - In
FIGS. 4 and 5 therock face 78 is generally perpendicular to the longitudinal direction of the drill hole. This is not necessarily the case. In many applications, particularly in arduous underground conditions, the rock face is inclined to the axial direction of the hole. Clearly, the orientation of the rock support tendon is determined by the hole direction. Similarly, the orientation of the bearing plate is determined by the orientation of the rock face surrounding the mouth of the drill hole. It is for this reason that a degree of flexibility of the body of the device is required. The tubular second portion is inserted into the drill hole and is therefore not able to be moved to any meaningful extent. The bulbous first portion which is captured by the domed bearing plate must be movable, together with the bearing plate, relatively to the rock support tendon. The bellows-likeregion 30 allows this movement to take place. -
FIG. 6 shows the use of the device with atendon 46A which includes an elongate, slightly flexible,cable 50B, and not a rigid shank. - An
end 90 of the cable projects from a mouth of adrill hole 70 formed in arock body 74, and passes through avolume 18 inside adevice 10A which is similar to thedevice 10, but which includes an additionaltubular spigot 98. Other parts of thedevice 10A, which are the same as parts of thedevice 10, bear similar reference numbers. Thedevice 10A is located inside a bearingplate 52 in that it has an opening 100 through which thespigot 98 extends. - A
breather tube 102 extends through thespigot 98, and thevolume 18, into thedrill hole 70 and, alongside thecable 50B, to an inner end of the drill hole. - A
barrel 106 is passed onto theend 90 and awedge 108 is engaged with theend 90 and the barrel, which bears against an outer face of the bearingplate 52. These components are used to tension the cable, as is known in the art. Grout is injected into the drill hole through thespigot 44 and fills the annular space between the cable and a wall of the drill hole. Air is expelled through thebreather tube 102. -
FIGS. 7 and 8 show anotherdevice 10B according to the invention in perspective and in cross-section respectively. The device has abody 12B with a first, frusto-conical,portion 14B and a second, tubular,portion 16B. Theportion 14B has a plurality ofapertures 112, and twoformations spigots apertures 112 weaken the body and allow for a degree of relative movement between thebody portions passage 18B, through thebody 12B, acts in the same way as thevolume 18. - The
device 10B is used in the same way as thedevice 10A, but preferably with a bearing plate of a corresponding shape i.e. not as domed as the bearingplate 52.
Claims (12)
1. A grout delivery device for use with a bearing plate and a rock support tendon which extends through an opening in the bearing plate, the device including a body which defines an internal volume, a first aperture positioned in a surface of the body which opposes an inner surface of the bearing plate, a second aperture in the body which opposes the first aperture, the rock support tendon extending through the first and second apertures which are in communication with the volume, and a grout opening in the body which is displaced from the first and second apertures and through which grout is injectable into the volume.
2. A device according to claim 1 wherein the body includes a first body, portion in which the first aperture and the grout opening are located and a second body portion in which the second aperture is located.
3. A device according to claim 2 wherein the second body portion is movable relative to the first body portion at least to a limited extent.
4. A device according to claim 3 wherein the body includes bellows-type formations which allow the second body portion to be movable relative to the first body portion.
5. A device according to claim 2 , wherein an outer surface of the first body portion surrounds the first aperture and is convex, semi-spherical or conical in shape.
6. A device according to claim 2 wherein the second body portion is substantially tubular.
7. A device according to claim 1 wherein the grout opening is formed by a spigot which projects from the body and through which is formed a passage.
8. An assembly of a device according to claim 1 and a bearing plate which includes an opening which is aligned with the first aperture in the body and a second opening which is in register with the grout opening in the body.
9. An assembly according to claim 8 which includes a rock support tendon which extends through the first and second apertures and through the opening of the bearing plate.
10. An assembly according to claim 9 which includes a seal at an interface of the device and the rock support tendon in the region of the first aperture.
11. An assembly according to claim 8 which includes an elongate tube which is engaged with the body in direct communication with the second aperture.
12. An assembly according to claim 8 wherein the bearing plate has a domed area in which the opening is located.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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ZA200902313 | 2009-04-03 | ||
ZA2009/02313 | 2009-04-03 | ||
PCT/ZA2009/000053 WO2010115218A1 (en) | 2009-04-03 | 2009-06-15 | A grout delivery system for a rock bolt |
Publications (1)
Publication Number | Publication Date |
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US20120177448A1 true US20120177448A1 (en) | 2012-07-12 |
Family
ID=41345109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/262,707 Abandoned US20120177448A1 (en) | 2009-04-03 | 2009-06-15 | Grout delivery system for a rock bolt |
Country Status (8)
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US (1) | US20120177448A1 (en) |
EP (1) | EP2414634B1 (en) |
AU (1) | AU2009343741A1 (en) |
CA (1) | CA2757519C (en) |
CL (1) | CL2011002464A1 (en) |
PL (1) | PL2414634T3 (en) |
WO (1) | WO2010115218A1 (en) |
ZA (1) | ZA201107197B (en) |
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US20140037388A1 (en) * | 2011-02-24 | 2014-02-06 | Tomi Ahola | Rock bolt |
US8678729B2 (en) | 2011-01-07 | 2014-03-25 | Fci Holdings Delaware, Inc. | Fully grouted mine roof bolt with expansion anchor |
US20150097589A1 (en) * | 2013-10-08 | 2015-04-09 | University Of Florida Research Foundation, Inc. | Corrosion detection in structural tendons |
US9470088B2 (en) | 2012-12-10 | 2016-10-18 | Suomen Metallityö Oy | Rock anchor bolt |
CN109026101A (en) * | 2018-09-13 | 2018-12-18 | 于守东 | A kind of mining anchor dispensing device and its application method |
US20190100998A1 (en) * | 2015-06-23 | 2019-04-04 | Ncm Innovations (Pty) Ltd. | Groutable rock anchor assembly |
US10253628B2 (en) * | 2016-09-02 | 2019-04-09 | J-Lok Co. | Pumpable resin system |
US20210108514A1 (en) * | 2017-10-27 | 2021-04-15 | Epiroc Rock Drills Aktiebolag | Method and system for ensuring the quality of a multi-component mixture for rock reinforcement |
US10988906B2 (en) * | 2019-03-11 | 2021-04-27 | Horst K. Aschenbroich | Controlling backflow from drilling with hollow rebar and grouting |
US11215053B2 (en) * | 2017-09-07 | 2022-01-04 | Ncm Innovations (Pty) Ltd | Adapted grout delivery sleeve |
US11867061B2 (en) | 2019-02-13 | 2024-01-09 | Fci Holdings Delaware, Inc. | Resin injection dolly |
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CN106869978A (en) * | 2017-03-14 | 2017-06-20 | 中国十七冶集团有限公司 | A kind of tunnel hollow grouting anchor of the simple automatic exhaust device of band |
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DE102006059891A1 (en) * | 2006-12-19 | 2008-06-26 | Minova International Ltd., Witney | Anchor with spreading element and filling jacket |
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2009
- 2009-06-15 AU AU2009343741A patent/AU2009343741A1/en not_active Abandoned
- 2009-06-15 EP EP09793439A patent/EP2414634B1/en active Active
- 2009-06-15 PL PL09793439T patent/PL2414634T3/en unknown
- 2009-06-15 WO PCT/ZA2009/000053 patent/WO2010115218A1/en active Application Filing
- 2009-06-15 US US13/262,707 patent/US20120177448A1/en not_active Abandoned
- 2009-06-15 CA CA2757519A patent/CA2757519C/en active Active
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2011
- 2011-10-03 ZA ZA2011/07197A patent/ZA201107197B/en unknown
- 2011-10-03 CL CL2011002464A patent/CL2011002464A1/en unknown
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US3379019A (en) * | 1965-05-03 | 1968-04-23 | Chester I. Williams | Rock bolt assembly for upgrouting operations |
US4661022A (en) * | 1985-11-14 | 1987-04-28 | Seegmiller Ben L | Rock bolt structure and installation |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
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US8678729B2 (en) | 2011-01-07 | 2014-03-25 | Fci Holdings Delaware, Inc. | Fully grouted mine roof bolt with expansion anchor |
US20140037388A1 (en) * | 2011-02-24 | 2014-02-06 | Tomi Ahola | Rock bolt |
US8998541B2 (en) * | 2011-02-24 | 2015-04-07 | Suomen Metallityö Oy | Rock bolt |
US9470088B2 (en) | 2012-12-10 | 2016-10-18 | Suomen Metallityö Oy | Rock anchor bolt |
AU2013357138B2 (en) * | 2012-12-10 | 2017-07-27 | Suomen Metallityo Oy | Rock anchor bolt |
CN108301857A (en) * | 2012-12-10 | 2018-07-20 | 索曼梅塔利托公司 | Rock anchor |
US20150097589A1 (en) * | 2013-10-08 | 2015-04-09 | University Of Florida Research Foundation, Inc. | Corrosion detection in structural tendons |
US9829452B2 (en) * | 2013-10-08 | 2017-11-28 | University Of Florida Research Foundation, Inc. | Corrosion detection in structural tendons |
US10465515B2 (en) * | 2015-06-23 | 2019-11-05 | Ncm Innovations (Pty) Ltd. | Groutable rock anchor assembly |
US20190100998A1 (en) * | 2015-06-23 | 2019-04-04 | Ncm Innovations (Pty) Ltd. | Groutable rock anchor assembly |
US10344593B2 (en) * | 2015-06-23 | 2019-07-09 | Ncm Innovations (Pty) Ltd. | Grout delivery system |
US10253628B2 (en) * | 2016-09-02 | 2019-04-09 | J-Lok Co. | Pumpable resin system |
US10669848B2 (en) | 2016-09-02 | 2020-06-02 | J-Lok Co. | Pumpable resin system |
US11215053B2 (en) * | 2017-09-07 | 2022-01-04 | Ncm Innovations (Pty) Ltd | Adapted grout delivery sleeve |
US20210108514A1 (en) * | 2017-10-27 | 2021-04-15 | Epiroc Rock Drills Aktiebolag | Method and system for ensuring the quality of a multi-component mixture for rock reinforcement |
US11454115B2 (en) * | 2017-10-27 | 2022-09-27 | Epiroc Rock Drills Aktiebolag | Method and system for ensuring the quality of a multi-component mixture for rock reinforcement |
CN109026101A (en) * | 2018-09-13 | 2018-12-18 | 于守东 | A kind of mining anchor dispensing device and its application method |
US11867061B2 (en) | 2019-02-13 | 2024-01-09 | Fci Holdings Delaware, Inc. | Resin injection dolly |
US10988906B2 (en) * | 2019-03-11 | 2021-04-27 | Horst K. Aschenbroich | Controlling backflow from drilling with hollow rebar and grouting |
Also Published As
Publication number | Publication date |
---|---|
ZA201107197B (en) | 2012-06-27 |
WO2010115218A1 (en) | 2010-10-07 |
CA2757519A1 (en) | 2010-10-07 |
AU2009343741A1 (en) | 2011-10-27 |
EP2414634B1 (en) | 2013-01-09 |
CL2011002464A1 (en) | 2012-07-20 |
PL2414634T3 (en) | 2013-08-30 |
CA2757519C (en) | 2016-04-12 |
EP2414634A1 (en) | 2012-02-08 |
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