WO2017120633A1 - A point anchoring device - Google Patents

A point anchoring device Download PDF

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Publication number
WO2017120633A1
WO2017120633A1 PCT/AU2017/000004 AU2017000004W WO2017120633A1 WO 2017120633 A1 WO2017120633 A1 WO 2017120633A1 AU 2017000004 W AU2017000004 W AU 2017000004W WO 2017120633 A1 WO2017120633 A1 WO 2017120633A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchoring device
tube
point anchoring
distal end
end portion
Prior art date
Application number
PCT/AU2017/000004
Other languages
French (fr)
Inventor
Dale CAPELL
Original Assignee
Capell Dale
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2016900088A external-priority patent/AU2016900088A0/en
Application filed by Capell Dale filed Critical Capell Dale
Priority to AU2017207513A priority Critical patent/AU2017207513A1/en
Publication of WO2017120633A1 publication Critical patent/WO2017120633A1/en
Priority to AU2022204855A priority patent/AU2022204855A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • 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
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the 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
    • 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
    • E21D21/0086—Bearing plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
    • F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like

Definitions

  • the present invention broadly relates to a point anchoring device.
  • the present invention relates to a point anchoring device for use with a friction stabiliser.
  • Local ground support such as a welded wire mesh is generally used to prevent smaller rocks from falling from the back and ribs. Being a metal screen with openings, a welded wire mesh is typically held to the back using point anchor bolts or resin grouted rebar.
  • Area ground support is used to prevent major ground failure. Holes are drilled into the back (ceiling) and walls and a long steel rod (or rock bolt) is installed to hold the ground together.
  • rock bolt There are two main categories of rock bolt being differentiated by how they engage the host rock, namely mechanical dynamic (MD) bolts and friction bolts.
  • MD bolts are a common style of area ground support, being a metal bar typically between 20 mm to 25 mm in diameter, and between 1 m to 4 m long.
  • An expansion shell is provided at the end of the bolt which is inserted into the hole. As the bolt is tightened by the installation drill, the expansion shell expands and the bolt tightens thereby holding the rock together.
  • Friction bolts which are also known as friction stabilisers, are frequently called by the genericised trademark Split SetTM. It is well recognised that friction bolts are much faster and easier to install than MD bolts. This results in a significant reduction in bolting costs.
  • a friction bolt has only two parts, a tube and a matching domed bearing plate. In use, the high strength steel tube is slotted along its length. One end of the tube is tapered for easy insertion into a drill 5 hole whereas the other has a welded ring flange to hold the bearing plate.
  • the tube With the bearing plate in place, the tube is driven (often by way of hammering) into a slightly smaller hole. As the tube slides into place, the full length of the slot narrows, causing radial pressure to be exerted against the rock over its full contact length. As such, the pressure from the friction bolt on the wall
  • Friction bolts are commonly used in underground
  • a point anchoring device adapted to be used with a pre-existing friction stabiliser having a tube embedded in an elongate hollow in the ground, the point anchoring device including: 5 an elongate bolt adapted in use to be inserted into the tube which has a distal end portion with an opening; and an anchoring mechanism located at one end of the elongate bolt; wherein the anchoring mechanism is adapted in use to engage the distal end portion of the tube including the opening so as to facilitate
  • the tube is cylindrical in shape. More preferably, the distal end portion of the tube tapers towards the opening. Even more preferably, the anchoring mechanism is adapted to initially radially open up the tapering distal end portion of the tube and close the opening as the elongate bolt is pushed into a working position.
  • the anchoring mechanism includes active and passive elements.
  • the active element is adapted to be driven to an operating position where the active element urges against at least part of the passive element resulting in the part of the passive element causing radial pressure on the distal end portion of the tube. Consequently, the distal end portion of the tube is further urged outwardly and jammed up against the elongate hollow.
  • the active element is a wedging means. More preferably, the wedging means is a frustoconical expansion plug. Even more preferably, the wedging means has a threaded working end.
  • the passive element is a chunk with a pair of flanges at one end, the flanges being adapted to threadably engage the working end of the wedging means. More preferably, the other end of the chunk is connected to a distal end of the elongate bolt. Even more preferably, when in use, at least part of the chunk is in contact with the distal end portion of the tube of the friction stabiliser.
  • the elongate bolt has an opposite end with a grasping means.
  • the grasping means includes an annular ring configured to facilitate driving of the active element.
  • Figure 1A is a cross sectional view of a point anchoring device in accordance with the preferred embodiment of the present invention with an anchoring mechanism in a non-operating state
  • Figure 1 B is a cross sectional view of the point anchoring device of Figure 1A with the anchoring mechanism in an operating state;
  • Figure 2A is a cross sectional view of an elongate hollow provided in the ground
  • Figure 2B is a cross sectional view of a friction stabiliser embedded in the elongate hollow of Figure 2A;
  • Figure 3 is an active element of the anchoring mechanism of the point anchoring device of Figure 1 ;
  • Figure 4 is a passive element of the anchoring mechanism of the point anchoring device of Figure 1 ;
  • Figure 5 is a magnified perspective view of part of the anchoring mechanism
  • Figure 6 is a cross sectional view illustrating installation of the point anchoring mechanism into a pre-existing friction stabiliser with the anchoring mechanism in an non-operating state
  • Figure 7 is a cross sectional view illustrating installation of the point anchoring mechanism into a pre-existing friction stabiliser with the anchoring mechanism in an operating state
  • Figure 8 is a perspective view showing an exposed end portion of the point anchoring device with a grasping means after installation.
  • a point anchoring device of the present invention is intended to be used with a pre-existing friction stabiliser (or Split SetTM) for strengthening thereof so that it can sustain a higher strata load and to augment the ground support.
  • the pre-existing friction stabiliser 12 has a tube 14 embedded in an elongate hollow 18 in the ground 20.
  • the point anchoring device 10 of the present invention has an elongate bolt 22 and an anchoring mechanism 28 located at the one end of the elongate bolt 22.
  • the elongate bolt 22 is configured in use to be inserted into the tube 14 which has a distal end portion 26 with an opening 24.
  • the anchoring mechanism 28 has an active element which is in the form of a wedging means 30 and a passive element in the form of a chunk 32.
  • the wedging means 30 is in the shape of a frustoconical expansion plug with a threaded working end 34.
  • the chunk 32 has a pair of flanges 36 & 38 at one end.
  • the flanges 36 & 38 are configured to threadably engage the working end of the wedging means 30.
  • the other end of the chunk 32 is connected to a distal end 23 of the elongate bolt 22.
  • the wedging means 30 is driven to an operating position where the working end 34 of the wedging means 30 urges against the flanges 36 & 38 of the chunk 32 resulting in radial flaring of the flanges 36 & 38 (see Figure 7) thereby causing radial pressure on the distal end portion 26 of the tube 14.
  • the distal end portion 26 of the tube 14 is urged outwardly further and jammed up against the elongate hollow 8..
  • the elongate bolt 22 has an opposite end with a grasping means 48 having an annular ring 50 configured to facilitate driving of the wedging means 30.
  • the anchoring mechanism 28 is advanced inside and along the tube 14 towards the distal end portion 26 until the flanges 36 & 38 overlap with the distal end portion 26.
  • the anchoring mechanism 28 then engages the distal end portion 26 of the tube 14 which includes the opening 24 so as to facilitate strengthening of the pre-existing friction stabiliser.
  • the anchoring mechanism 28 involves use of the frustoconical expansion plug 30 acting on a chunk 32 with flanges 36 & 38 that would radially expand against the wall of the elongate hollow 18. Once the elongate bolt 32 reaches a point where the flanges 36 & 38 overlap with the distal end portion 26, the annular ring 50 provided on the grasping means 48 is rotated to pull the expansion plug 30 towards the opening 24. This causes the working end 34 of the frustoconical shaped expansion plug 30 to radially open up the flanges 36 & 38.
  • the tube 14 is cylindrical in shape and the distal end portion 26 of the tube 14 tapers towards the opening 24.
  • the anchoring mechanism 28 initially radially opens up the tapering distal end portion 26 of the tube 14 and closes the opening 24 as the elongate bolt 22 is pushed into the working position.
  • the flanges 36 & 38 flare outwardly thereby jamming against the inside wall of the distal end portion 26 resulting in securing of the friction stabiliser 12 as well as the point anchoring device 10 itself to the elongate hollow 18 and hence the ground 20.
  • the point anchoring device of the present invention may offer at least the following advantages:

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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)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Soil Working Implements (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The present invention relates to a point anchoring device adapted to be used with a pre-existing friction stabiliser having a tube embedded in an elongate hollow in the ground. The point anchoring device includes an elongate bolt and an anchoring mechanism. The elongate bolt is adapted in use to be inserted into the tube which has a distal end portion with an opening. The anchoring mechanism is located at one end of the elongate bolt. The anchoring mechanism is adapted in use to engage the distal end portion of the tube including the opening so as to facilitate strengthening of the pre-existing friction stabiliser.

Description

A Point Anchoring Device
Technical Field
The present invention broadly relates to a point anchoring device. In particular, the present invention relates to a point anchoring device for use with a friction stabiliser.
Background of the Invention
In the underground hard rock mining industry where various underground mining techniques are used to excavate hard minerals and ores of gems such as diamonds, some means of support is essential in order to maintain the stability of the excavated openings. This support typically comes in two forms, namely local support and area support.
Local ground support such as a welded wire mesh is generally used to prevent smaller rocks from falling from the back and ribs. Being a metal screen with openings, a welded wire mesh is typically held to the back using point anchor bolts or resin grouted rebar.
Area ground support is used to prevent major ground failure. Holes are drilled into the back (ceiling) and walls and a long steel rod (or rock bolt) is installed to hold the ground together. There are two main categories of rock bolt being differentiated by how they engage the host rock, namely mechanical dynamic (MD) bolts and friction bolts.
MD bolts are a common style of area ground support, being a metal bar typically between 20 mm to 25 mm in diameter, and between 1 m to 4 m long. An expansion shell is provided at the end of the bolt which is inserted into the hole. As the bolt is tightened by the installation drill, the expansion shell expands and the bolt tightens thereby holding the rock together.
Friction bolts, which are also known as friction stabilisers, are frequently called by the genericised trademark Split Set™. It is well recognised that friction bolts are much faster and easier to install than MD bolts. This results in a significant reduction in bolting costs. A friction bolt has only two parts, a tube and a matching domed bearing plate. In use, the high strength steel tube is slotted along its length. One end of the tube is tapered for easy insertion into a drill 5 hole whereas the other has a welded ring flange to hold the bearing plate.
With the bearing plate in place, the tube is driven (often by way of hammering) into a slightly smaller hole. As the tube slides into place, the full length of the slot narrows, causing radial pressure to be exerted against the rock over its full contact length. As such, the pressure from the friction bolt on the wall
10 holds the rock together. Friction bolts are commonly used in underground
mines, construction sites, railways and road tunnels for ground support. They are used more often for above ground applications or anywhere reliable ground stabilisation is required. Despite being widely used for underground and surface support in multiple applications, friction stabilisers have a i s shortcoming that they may not have adequate strength when subject to strata load in some situations.
It is an object of the present invention to provide a point anchoring device which may overcome or at least ameliorate the above shortcoming or which will at least provide a useful alternative. 0 Summary of the Invention
According to one aspect of the present invention, there is provided a point anchoring device adapted to be used with a pre-existing friction stabiliser having a tube embedded in an elongate hollow in the ground, the point anchoring device including: 5 an elongate bolt adapted in use to be inserted into the tube which has a distal end portion with an opening; and an anchoring mechanism located at one end of the elongate bolt; wherein the anchoring mechanism is adapted in use to engage the distal end portion of the tube including the opening so as to facilitate
0 strengthening of the pre-existing friction stabiliser. Preferably, the tube is cylindrical in shape. More preferably, the distal end portion of the tube tapers towards the opening. Even more preferably, the anchoring mechanism is adapted to initially radially open up the tapering distal end portion of the tube and close the opening as the elongate bolt is pushed into a working position.
In a preferred embodiment, the anchoring mechanism includes active and passive elements. Preferably, the active element is adapted to be driven to an operating position where the active element urges against at least part of the passive element resulting in the part of the passive element causing radial pressure on the distal end portion of the tube. Consequently, the distal end portion of the tube is further urged outwardly and jammed up against the elongate hollow. Preferably, the active element is a wedging means. More preferably, the wedging means is a frustoconical expansion plug. Even more preferably, the wedging means has a threaded working end.
Preferably, the passive element is a chunk with a pair of flanges at one end, the flanges being adapted to threadably engage the working end of the wedging means. More preferably, the other end of the chunk is connected to a distal end of the elongate bolt. Even more preferably, when in use, at least part of the chunk is in contact with the distal end portion of the tube of the friction stabiliser.
Preferably, the elongate bolt has an opposite end with a grasping means.
More preferably, the grasping means includes an annular ring configured to facilitate driving of the active element.
Brief Description of the Drawings
The invention may be better understood from the following non-limiting description of the preferred embodiment, in which:
Figure 1A is a cross sectional view of a point anchoring device in accordance with the preferred embodiment of the present invention with an anchoring mechanism in a non-operating state; Figure 1 B is a cross sectional view of the point anchoring device of Figure 1A with the anchoring mechanism in an operating state;
Figure 2A is a cross sectional view of an elongate hollow provided in the ground;
Figure 2B is a cross sectional view of a friction stabiliser embedded in the elongate hollow of Figure 2A;
Figure 3 is an active element of the anchoring mechanism of the point anchoring device of Figure 1 ;
Figure 4 is a passive element of the anchoring mechanism of the point anchoring device of Figure 1 ;
Figure 5 is a magnified perspective view of part of the anchoring mechanism;
Figure 6 is a cross sectional view illustrating installation of the point anchoring mechanism into a pre-existing friction stabiliser with the anchoring mechanism in an non-operating state;
Figure 7 is a cross sectional view illustrating installation of the point anchoring mechanism into a pre-existing friction stabiliser with the anchoring mechanism in an operating state; and
Figure 8 is a perspective view showing an exposed end portion of the point anchoring device with a grasping means after installation.
Detailed Description of the Drawings
It should be noted that a point anchoring device of the present invention is intended to be used with a pre-existing friction stabiliser (or Split Set™) for strengthening thereof so that it can sustain a higher strata load and to augment the ground support. Referring to Figure 2A and 2B, the pre-existing friction stabiliser 12 has a tube 14 embedded in an elongate hollow 18 in the ground 20. Referring to Figures 1A and 1 B, the point anchoring device 10 of the present invention has an elongate bolt 22 and an anchoring mechanism 28 located at the one end of the elongate bolt 22. The elongate bolt 22 is configured in use to be inserted into the tube 14 which has a distal end portion 26 with an opening 24.
Turning to Figures 3, 4, 1A and 1 B, the anchoring mechanism 28 has an active element which is in the form of a wedging means 30 and a passive element in the form of a chunk 32. The wedging means 30 is in the shape of a frustoconical expansion plug with a threaded working end 34.
As shown in Figures 5, 6 and 7, the chunk 32 has a pair of flanges 36 & 38 at one end. The flanges 36 & 38 are configured to threadably engage the working end of the wedging means 30. The other end of the chunk 32 is connected to a distal end 23 of the elongate bolt 22. When in use, the wedging means 30 is driven to an operating position where the working end 34 of the wedging means 30 urges against the flanges 36 & 38 of the chunk 32 resulting in radial flaring of the flanges 36 & 38 (see Figure 7) thereby causing radial pressure on the distal end portion 26 of the tube 14. As a consequence, the distal end portion 26 of the tube 14 is urged outwardly further and jammed up against the elongate hollow 8..
Referring to Figures 6, 7 and 8, the elongate bolt 22 has an opposite end with a grasping means 48 having an annular ring 50 configured to facilitate driving of the wedging means 30.
In use, the anchoring mechanism 28 is advanced inside and along the tube 14 towards the distal end portion 26 until the flanges 36 & 38 overlap with the distal end portion 26. The anchoring mechanism 28 then engages the distal end portion 26 of the tube 14 which includes the opening 24 so as to facilitate strengthening of the pre-existing friction stabiliser. The anchoring mechanism 28 involves use of the frustoconical expansion plug 30 acting on a chunk 32 with flanges 36 & 38 that would radially expand against the wall of the elongate hollow 18. Once the elongate bolt 32 reaches a point where the flanges 36 & 38 overlap with the distal end portion 26, the annular ring 50 provided on the grasping means 48 is rotated to pull the expansion plug 30 towards the opening 24. This causes the working end 34 of the frustoconical shaped expansion plug 30 to radially open up the flanges 36 & 38.
It should be noted that the tube 14 is cylindrical in shape and the distal end portion 26 of the tube 14 tapers towards the opening 24. As the point anchoring device 10 is put into place for use, the anchoring mechanism 28 initially radially opens up the tapering distal end portion 26 of the tube 14 and closes the opening 24 as the elongate bolt 22 is pushed into the working position. Once the anchoring mechanism 28 is activated, the flanges 36 & 38 flare outwardly thereby jamming against the inside wall of the distal end portion 26 resulting in securing of the friction stabiliser 12 as well as the point anchoring device 10 itself to the elongate hollow 18 and hence the ground 20.
Now that a preferred embodiment of the present invention has been described in some detail, it will be apparent to a skilled person in the art that the point anchoring device of the present invention may offer at least the following advantages:
1. it provides a cost effective way of strengthening a pre-existing
friction stabiliser by essentially converting it into an MD bolt; and
2. it is quick and easy to apply.
Those skilled in the art will appreciate that the invention described herein is susceptible to variations and modifications other than those specifically described. All such variations and modifications are to be considered within the scope and spirit of the present invention the nature of which is to be determined from the foregoing description.

Claims

Claims
1. A point anchoring device adapted to be used with a pre-existing friction stabiliser having a tube embedded in an elongate hollow in the ground, the point anchoring device including:
5 an elongate bolt adapted in use to be inserted into the tube which has a distal end portion with an opening; and an anchoring mechanism located at one end of the elongate bolt; wherein the anchoring mechanism is adapted in use to engage the distal end portion of the tube including the opening so as to facilitate o strengthening of the pre-existing friction stabiliser.
2. The point anchoring device of claim 1 , wherein the tube is cylindrical in shape.
3. The point anchoring device of either claim 1 or 2, wherein the distal end portion of the tube tapers towards the opening.
4. The point anchoring device of any one of the preceding claims, wherein the anchoring mechanism is adapted to initially radially open up the tapering distal end portion of the tube and close the opening as the elongate bolt is pushed into a working position.
5. The point anchoring device of any one of the preceding claims, wherein the anchoring mechanism includes active and passive elements.
6. The point anchoring device of claim 5, wherein the active element is adapted to be driven to an operating position where the active element urges against at least part of the passive element resulting in the part of the passive element causing radial pressure on the distal end portion of the tube.
7. The point anchoring device of claim 6, wherein the distal end portion of the tube is further urged outwardly and jammed up against the elongate hollow.
5 8. The point anchoring device of any one of claims 5 to 7, wherein the active element is a wedging means.
9. The point anchoring device of claim 8, wherein the wedging means is a frustoconical expansion plug.
10. The point anchoring device of either claim 8 or 9, wherein the wedging io means has a threaded working end.
1 1. The point anchoring device of any one of claims 8 to 10, wherein the passive element is a chunk with a pair of flanges at one end, the flanges being adapted to threadably engage the working end of the wedging means. is
12. The point anchoring device of claim 11 , wherein the other end of the chunk is connected to a distal end of the elongate bolt.
13. The point anchoring device of either claim 1 1 or 12, wherein when in use, at least part of the chunk is in contact with the distal end portion of the tube of the friction stabiliser.
20 14. The point anchoring device of any one of the preceding claims, wherein the elongate bolt has an opposite end with a grasping means.
15. The point anchoring device of claim 14, wherein the grasping means includes an annular ring configured to facilitate driving of the active element.
25
PCT/AU2017/000004 2016-01-12 2017-01-12 A point anchoring device WO2017120633A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2017207513A AU2017207513A1 (en) 2016-01-12 2017-01-12 A point anchoring device
AU2022204855A AU2022204855A1 (en) 2016-01-12 2022-07-06 A Point Anchoring Device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2016900088A AU2016900088A0 (en) 2016-01-12 A Point Anchoring Device
AU2016900088 2016-01-12

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WO2017120633A1 true WO2017120633A1 (en) 2017-07-20

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019051512A3 (en) * 2017-09-07 2019-04-25 Ncm Innovations (Pty) Ltd Adapted grout delivery sleeve
WO2019095006A1 (en) * 2017-11-20 2019-05-23 Peter Bryce Catoi Rock bolt
CN111648806A (en) * 2020-07-09 2020-09-11 中国科学院地质与地球物理研究所 Energy-absorbing anchor rod device with umbrella-shaped structure
WO2023010159A1 (en) * 2021-08-05 2023-02-09 Sandvik Mining And Construction Australia (Production/Supply) Pty Ltd Double-wedge rock bolt

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4656806A (en) * 1984-12-14 1987-04-14 Hilti Aktiengesellschaft Expansion anchor assembly
US20100278593A1 (en) * 2001-01-12 2010-11-04 Cook James D Expansion shell assembly
WO2015013743A1 (en) * 2013-07-30 2015-02-05 Dywidag-Systems International Pty Limited Friction bolt assembly
WO2015189818A1 (en) * 2014-06-13 2015-12-17 Skema Mining Components (Pty) Ltd Combination roof bolt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4656806A (en) * 1984-12-14 1987-04-14 Hilti Aktiengesellschaft Expansion anchor assembly
US20100278593A1 (en) * 2001-01-12 2010-11-04 Cook James D Expansion shell assembly
WO2015013743A1 (en) * 2013-07-30 2015-02-05 Dywidag-Systems International Pty Limited Friction bolt assembly
WO2015189818A1 (en) * 2014-06-13 2015-12-17 Skema Mining Components (Pty) Ltd Combination roof bolt

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019051512A3 (en) * 2017-09-07 2019-04-25 Ncm Innovations (Pty) Ltd Adapted grout delivery sleeve
US11215053B2 (en) 2017-09-07 2022-01-04 Ncm Innovations (Pty) Ltd Adapted grout delivery sleeve
WO2019095006A1 (en) * 2017-11-20 2019-05-23 Peter Bryce Catoi Rock bolt
AU2018368811B2 (en) * 2017-11-20 2023-11-30 Peter Bryce Catoi Rock bolt
CN111648806A (en) * 2020-07-09 2020-09-11 中国科学院地质与地球物理研究所 Energy-absorbing anchor rod device with umbrella-shaped structure
CN111648806B (en) * 2020-07-09 2021-05-14 中国科学院地质与地球物理研究所 Energy-absorbing anchor rod device with umbrella-shaped structure
WO2023010159A1 (en) * 2021-08-05 2023-02-09 Sandvik Mining And Construction Australia (Production/Supply) Pty Ltd Double-wedge rock bolt

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Publication number Publication date
AU2022204855A1 (en) 2022-07-28
AU2017207513A1 (en) 2018-07-26

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