AU2014262290B2 - A mesh assembly - Google Patents
A mesh assembly Download PDFInfo
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- AU2014262290B2 AU2014262290B2 AU2014262290A AU2014262290A AU2014262290B2 AU 2014262290 B2 AU2014262290 B2 AU 2014262290B2 AU 2014262290 A AU2014262290 A AU 2014262290A AU 2014262290 A AU2014262290 A AU 2014262290A AU 2014262290 B2 AU2014262290 B2 AU 2014262290B2
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Abstract
A MESH ASSEMBLY A mesh assembly (10) for securing a rock face has a longitudinally extending mesh panel (100) formed of a flexible plastics material and comprises an array of longitudinally extending mesh elements (101) and an array of laterally extending mesh elements (102) together defining a network of apertures (103). The mesh assembly (10) also has a reinforcing member (200) secured to and extending along a face of a first longitudinal end portion (104) of the mesh panel (100). The reinforcing member (200) has a greater flexural stiffness than the first longitudinal end portion (104) of the mesh panel (100). 20)0 1-101 2bZl .-Olo .000FIG 2011-
Description
The present invention relates to strata control in civil engineering and mining operations and in particular relates to a mesh assembly for supporting the roof or wall surface of a mine, tunnel or other ground excavation.
Background [0002] Rock faces forming the roof or wall of mines, tunnels or other ground excavations are typically secured with the use of rock bolts in conjunction with reinforcing mesh sheets. Rock bolts, which may be in the form of a rigid steel bar or flexible steel strand, are secured into bore holes drilled through the rock face and consolidate and reinforce the rock strata. Mesh sheets extend across the rock face to locally confine the rock surface and prevent small fragments of rock from falling down and endangering occupants of the mine or tunnel.
[0003] The mesh sheets are typically secured against the rock face by being sandwiched between the rock face and the plate washer associated with each rock bolt that acts to transfer load between the rock bolt and the rock face.
[0004] The mesh sheets are typically in the form of welded steel wire mesh, formed in sheets with a length of the order of 2 to 6 m and a width of 0.5 to 2.4 m that can be manually handled and installed. The size of the sheets is generally limited by the fact that the mesh sheets are relatively rigid and heavy, with the wire elements forming the mesh typically having a diameter of the order of 4 to 6 mm.
[0005] To install the mesh sheets, the mesh sheet is held against the rock face whilst a series of bore holes are drilled into the rock face through the apertures in the wire mesh sheet and rock bolts are subsequently installed into the bore holes. The plate washers that secure the trailing head of each rock bolt against the rock face engage the wire elements of the mesh about the aperture through which the rock bolt is installed, sandwiching the wire mesh sheet between the plate washer and the rock face, thereby securing the mesh sheet against the rock face.
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2014262290 26 Sep 2018 [0006] The rock bolts are typically installed in a square or rectangular pattern along the length and width of each mesh sheet, and the full rock face is confined by a series of overlapping mesh sheets arranged side by side and end to end as required.
Summary of Invention [0007] In a first aspect the present invention provides a mesh assembly for securing a rock face, said mesh assembly comprising:
a mesh panel longitudinally extending between a first longitudinal edge and a second longitudinal edge, said mesh panel formed of a flexible plastics material and comprising an array of longitudinally extending mesh elements and an array of laterally extending mesh elements together defining a network of apertures; wherein only a longitudinal first end portion of said mesh panel adjacent to the first longitudinal edge has a reinforcing member secured thereto, said reinforcing member extending along a face of the first longitudinal end portion of said mesh panel, said reinforcing member having a greater flexural stiffness than said first longitudinal end portion of said mesh panel, wherein the reinforcing member extends both longitudinally and laterally along the face of the first longitudinal end portion.
[0008] Typically, said reinforcing member extends laterally across substantially an entire lateral width of said mesh panel.
[0009] Typically, said reinforcing member extends longitudinally across at least three rows of said apertures.
[0010] Typically, said reinforcing member has one or more openings exposing a plurality of said apertures.
[0011] In a preferred form, said mesh panel is rolled about a laterally extending axis to form a mesh roll with said first longitudinal end portion of said mesh panel projecting from said mesh roll.
[0012] Typically, said mesh roll is retained in the rolled form by way of one or more ties.
[0013] In one embodiment, said reinforcing member comprises a reinforcing mesh formed of an array of longitudinally extending reinforcing elements and an array of laterally extending reinforcing elements.
AH26(21346333J ):MSD
2014262290 17 Nov 2014 [0015] In one form, said longitudinally extending reinforcing elements are generally aligned with said longitudinally extending mesh elements of said mesh panel and said laterally extending reinforcing elements are generally aligned with said laterally extending mesh elements of said mesh panel.
[0016] In one form, said reinforcing mesh is tied to said mesh panel.
[0017] In one form, said reinforcing elements are formed of a fibre reinforced plastics material, typically fibreglass.
[0018] In another form, said reinforcing elements are formed of steel.
[0019] In an alternate embodiment, said reinforcing member comprises a reinforcing frame.
[0020] In one form, said reinforcing frame is formed of a plastics material.
[0021] The reinforcing frame may be formed of a fibre reinforced plastics material, typically fibreglass.
[0022] In an alternate form, said reinforcing frame is formed of steel.
[0023] In a second aspect, the present invention provides a method of installing the mesh assembly defined above against a rock face, said method comprising the steps of:
a) locating said first longitudinal end portion of said mesh panel against the rock face;
b) drilling a plurality of bore holes into the rock face;
c) installing a plurality of rock bolts, through apertures of said mesh panel at or adjacent said first longitudinal end portion, into each of said plurality of boreholes, with a plate washer mounted on each of said rock bolts securing said mesh panel against the rock face; and
d) repeating steps a) to c) for successive portions of said mesh panel.
[0024] Typically, step a) is carried out before step b), each of said boreholes being drilled through an aperture of said mesh panel at or adjacent said first longitudinal end portion.
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2014262290 17 Nov 2014 [0025] Alternatively, step b) may be carried out before step a).
[0026] Typically, said mesh panel is unrolled from a rolled form as successive portions of said mesh panel are located against the rock face.
Brief Description of Drawings [0027] Preferred embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings wherein:
[0028] Figure 1 is an isometric view of a mesh panel in a rolled form;
[0029] Figure 2 is an exploded isometric view of a mesh assembly according to a first embodiment;
[0030] Figure 3 is an isometric view of the mesh assembly of Figure 2.
[0031] Figure 4 an enlarged fragmentary view of the mesh assembly of Figure 2;
[0032] Figures 5 to 8 are isometric views depicting successive stages of installation of the mesh assembly of Figure 2 along a rock face;
[0033] Figures 9 and 10 are isometric views depicting successive stages of an alternate installation of the mesh assembly of Figure 2 on a rock face;
[0034] Figure 11 is an isometric view of a mesh assembly according to a second embodiment with the mesh panel thereof in a rolled form;
[0035] Figure 12 is an isometric view of the mesh assembly of Figure 11 with the mesh panel thereof in an unrolled form;
[0036] Figure 13 and 14 are isometric views depicting successive stages of installation of the mesh assembly of Figure 11 on a rock face;
[0037] Figures 15 and 16 are isometric views depicting successive stages of an alternate installation of the mesh assembly of Figure 11 on a rock face.
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2014262290 17 Nov 2014
Description of Embodiments [0038] Figure 1 depicts a mesh panel 100. The mesh panel 100 comprises an array of longitudinally extending mesh elements 101 and an array of laterally extending mesh elements 102 that together define a network of apertures 103 that extend through the thickness of the mesh panel 100. The mesh panel 100 is formed of a flexible plastics material. Polyester is a particularly suitable plastics material, however it is envisaged that other plastic materials, including polyethylene and polypropylene, may also be utilized as desired. Being formed of a flexible material, the mesh panel 100 may be readily rolled into a rolled form as depicted. The mesh panel 100 is in the general form of what is known as a “Geogrid”, known for use in reinforcing of soils in various applications, and stabilization in longwall mine changeover applications.
[0039] The configuration of the mesh elements 101, 102 may vary to suit particular applications, however each mesh element 101, 102 will typically have a lateral width of the order of 10 to 20 mm and a thickness of the order of 1.5 to 5 mm. The mesh elements 101, 102 will typically be spaced to provide for aperture 103 dimensions of the order of 90 by 100 mm, although again this may vary to suit particular applications. Being formed of plastics material, the mesh panel 100 is relatively lightweight and may thus be readily manually handled in relatively large sizes. The mesh panel will typically have a lateral width of the order of 1 to 3 m and a greater longitudinal length, which might typically be of the order of 2 to 10 m depending on the application. The mesh panel 100 may be readily handled in limited spaces within mines and such by virtue of being flexible and able to be rolled up into a rolled form as depicted in Figure 1.
[0040] A mesh assembly 10 according to a first embodiment and comprising the mesh panel 100 of Figure 1 together with a reinforcing member 200 is depicted in Figures 2 through 4. The mesh assembly 100 is formed by securing the reinforcing member 200 to the mesh panel 100 so as to extend along a face of a first longitudinal end portion 104 of the mesh panel 100.
[0041] The mesh panel 100 is rolled about a laterally extending axis so as to form a mesh roll
105 with the first longitudinal end portion 104 of the mesh panel 100 projecting from the mesh roll 105 and remaining in an at least substantially planar form. The mesh roll 105 may be retained in the roll form for ease of handling by way of one or more ties (not depicted).
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2014262290 17 Nov 2014 [0042] In the first embodiment, the reinforcing member 200 comprises a reinforcing mesh formed of an array of longitudinally extending reinforcing elements 201 and an array of laterally extending reinforcing elements 202. For clarity purposes, the mesh assembly 10 is depicted in an exploded form in Figure 2 with the reinforcing member 200 spaced from the mesh panel 100. In the arrangement depicted, the longitudinally extending reinforcing elements 201 are generally aligned with the longitudinally extending mesh elements 101 and the laterally extending reinforcing elements 202 are generally aligned with the laterally extending mesh elements 102. As a result, the reinforcing elements 201, 202 are not visible in Figures 3 and 4, with the reinforcing elements 201, 202 being secured to the rear face of the first longitudinal end portion 104 of the mesh panel 100 and covered by the mesh elements 101, 102. The reinforcing elements 201, 202 are particularly hidden by virtue of the fact that the reinforcing elements 201, 202 are thinner than the mesh elements 101, 102, typically being of a wire form having a diameter of about 4 to 6 mm. Other configurations and sizes of reinforcing elements 201, 202 are, however, envisaged to suit specific applications.
[0043] The reinforcing elements 201, 202 define openings 203 which expose apertures 103 of the mesh panel 100 and, in the arrangement depicted, are aligned with the apertures 103. It is envisaged, however, that the openings 203 of the reinforcing member 200 need not all align with apertures 103 of the mesh panel 100, so long as one or more of the openings 203 expose apertures 103 to allow installation of rock bolts through at least some of the apertures 103. The reinforcing elements 201, 202 may be spaced so as to define openings 203 of substantially the same size as the apertures 103, or the openings 203 could be made larger or smaller than the apertures 103.
[0044] As depicted in Figures 3 and 4, in the first embodiment the reinforcing member 200 is secured to the rear face of the first longitudinal end portion 104 of the mesh panel 100 by way of a plurality of ties 206 which may conveniently be in the form of cable ties. The reinforcing member 200 may, however, be secured to the face of the first longitudinal end portion 104 by any other convenient means.
[0045] The reinforcing member 200 preferably extends laterally across substantially the entire lateral width of the mesh panel 100 and preferably extends longitudinally across at least three rows of the apertures 103. In the arrangement depicted, the reinforcing member 200 extends longitudinally across four rows of the apertures 103.
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2014262290 17 Nov 2014 [0046] The reinforcing elements 201, 202 may be formed of any of various materials, so long as they serve to reinforce the longitudinal end portion 104 of the mesh panel 100, particularly increasing the flexural stiffness of the first longitudinal end portion 104 so as to assist in handling of the mesh assembly 10, particularly holding the first longitudinal end portion 104 against a rock face as will be further discussed below. The reinforcing elements 201, 202 may suitably be formed of a fibre reinforced plastics material, particularly fiberglass. It is also envisaged, however, that the reinforcing elements 201, 202 may be formed of other materials having a greater flexural stiffness than that of the mesh elements 101, 102 such that the reinforcing member 200 will have a greater flexural stiffness than the first longitudinal end portion 104 of the mesh panel 100. Other suitable materials include metallic materials such as steel or grades of plastics material that are flexurally stiffer than the flexible plastics material from which the mesh elements 101, 102 are formed.
[0047] Installation of the mesh assembly 10 against a rock face 1 forming the wall of a mine will now be described with reference to Figures 5 to 8. The first longitudinal end portion 104 of the mesh panel 100 is first located against the rock face 1 as depicted in Figure 5. In the installation depicted, the mesh assembly 10 is arranged such that the mesh assembly 10 extends laterally in a vertical direction, from adjacent the floor 2 of the mine towards the roof of the mine. Whilst the longitudinal end portion 104 is held against the rock face 1, with the mesh roll 105 retained in the rolled form, a series of three boreholes are drilled into the rock face 1 through the mesh assembly 10 at the first longitudinal end portion 104. Specifically, the boreholes are drilled through the apertures 103 in the mesh panel 100 and overlying opening 203 in the reinforcing member 200. Rather than boreholes being drilled through the first longitudinal end portion 104, and through the reinforcing member 200, it is also envisaged that the boreholes might be drilled through the mesh panel 100 adjacent the first longitudinal end portion 104 and reinforcing member 200. In the installation depicted three boreholes are laterally/vertically spaced along the first longitudinal end portion 104 across the lateral extent of the first longitudinal end portion 104, although it is envisaged that a larger or smaller number of boreholes may be provided.
[0048] A rock bolt 300, is then installed into each of the boreholes in the usual manner, with a plate washer 301 mounted on each rock bolt 300 immediately leading the rock bolt head 302.
The rock bolt 300 may be of any suitable form, including the form of a cable bolt or rigid steel bar form of rock bolt, or a fiberglass rock bolt or friction bolt. The plate washer 301 sandwiches (9344781_l):dah
2014262290 17 Nov 2014 the mesh assembly 10 between the plate washer 301 and the rock face 1, thereby securing the first longitudinal end portion 104 of the mesh panel 100 against the rock face 1. Provision of the reinforcing member 200 assists in handling of the mesh panel 100 and retaining the first longitudinal end portion 104 against the rock face 1, which may otherwise fold and fall from the rock face 1 if it were not reinforced, by virtue of being formed of flexible plastics material.
[0049] Once the first longitudinal end portion 104 of the mesh panel 100 has been secured against the rock face 1 with the rock bolts 300, a successive portion 106 of the mesh panel 100 is located against the rock face 1, by partially unrolling the mesh roll 105 along the rock face 1 (after having removed any ties retaining the mesh roll 105 in the rolled form). A further series of boreholes is then drilled into the rock face 1, through apertures 103 of the mesh panel 100. A rock bolt is then installed in each further borehole, securing the successive portion 106 of the mesh panel 100 against the rock face 1 with a plate washer associated with each further rock bolt 300 in the same manner as described above. Further successive portions of the mesh panel 100 are then located against the rock face 1 by further unrolling of the mesh roll 105, and further rock bolts installed, securing the successive portions of the mesh panel 100 as generally represented in Figure 7 and 8. With the mesh panel 100 being formed of flexible plastics material, a single mesh panel can be installed along a rock face 1 bending around corners and the like as depicted in the example of Figures 5 to 8. Substantial lengths of the rock face 1 can thus be readily secured with a single mesh assembly 10.
[0050] Figures 9 and 10 depict an alternate but equivalent mode of installation of a shorter mesh assembly 10 where the first longitudinal end portion 104 of the mesh panel 100 is first located against the rock face 1 such that it laterally extends horizontally along the wall adjacent the roof of the mine, and the mesh roll 105 is subsequently progressively unrolled vertically down toward the mine floor 2, as depicted in Figure 10.
[0051] A mesh assembly 50 according to a second embodiment and comprising the mesh panel 100 of Figure 1 together with a reinforcing member 250 is depicted in Figures 11 and 12.
Figure 11 depicts the mesh assembly 50 with the mesh panel 100 rolled about a laterally extending axis so as to form a mesh roll 105 with a first longitudinal end portion 104 of the mesh panel 100 projecting from the mesh 105 in the same manner as described above in relation to the first embodiment. The mesh assembly 50 with the mesh panel 100 in an unrolled form is depicted in Figure 12.
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2014262290 17 Nov 2014 [0052] In the second embodiment, the reinforcing member 250 comprises a reinforcing frame that is secured to the mesh panel 100 so as to extend along a front face of the first longitudinal end portion 104 of the mesh panel 100. The reinforcing member 250 will typically laterally extend over substantially the entire lateral width of the mesh panel 100 and will typically have a longitudinal length of the order of 300 to 500 mm. In the arrangement depicted, the reinforcing member 250 is provided with a single opening 253 that is bounded by a single frame element 251 forming the periphery of the reinforcing member 250. The frame element 251 will typically have a width of the order of 50 to 100 mm and a thickness of the order of 10 mm, however the reinforcing member 250 may be sized and configured to suit varying applications as desired.
[0053] Rather than defining a single opening 253, which exposes multiple apertures 103 of the underlying first longitudinal end portion 104 of the mesh panel 100, additional frame elements spanning across the opening 253 may be utilized as desired, so as to define a series of separate smaller openings. The reinforcing member 250 extends longitudinally across several rows of apertures 103, specifically being configured in the arrangement depicted such that the opening 253 exposes four rows of apertures 103 for installation of rock bolts.
[0054] The reinforcing member 250 may be formed of a plastics material, or may be formed of other materials, including fibre reinforced plastic materials such as fibreglass as desired, so long as the reinforcing member 250 reinforces the first longitudinal end portion 104 of the mesh panel 100, particularly increasing the flexural stiffness of the first longitudinal end portion 104 of the mesh panel 100. It is also envisaged that the reinforcing member 250 may be formed of a metallic material, such as steel and particularly might be formed of a frame of four steel rods defining the periphery of the reinforcing member. A plastics material will, however, typically be preferred for ease of handling, at least by virtue of having a lesser mass. The reinforcing member 250 may be secured to the face of the first longitudinal end portion 104 of the mesh panel 100 by any suitable means, including by tying such as with cable ties.
[0055] Referring to Figures 13 through 16 of the accompanying drawings, the mesh assembly 50 may be installed against a rock face 1 in essentially the same manner as described above in relation to the mesh assembly 10 of the first embodiment. As with the first embodiment, the first longitudinal end portion 104 of the mesh panel 100 is first located against the rock face 1 (typically either laterally extending vertically, as depicted in Figures 13 and 14, or laterally extending horizontally, as depicted in Figures 15 and 16. The reinforcing provided by the (9344781_l):dah ίο
2014262290 26 Sep 2018 reinforcing member 250 again assists in retaining the first longitudinal end portion 104 against the rock face 1 whilst a series of rock bolts 300 are installed in the manner described above to secure the first longitudinal end portion 104. Successive portions of the mesh panel 100 are then located against the rock face 1 and successive rows of rock bolts 300 are installed to secure the successive portions of the mesh panel 100 against the rock face 1. The same methodologies may also be utilized to secure rock faces in the form of roofs of mines, tunnels or other ground excavations as well as walls.
[0055a] As best shown in Figure 8, the mesh panel extends between a first longitudinal edge 110 and a second longitudinal edge 120, with the first longitudinal end portion 104 being adjacent to the first longitudinal edge 110. Also as shown in Figure 8, the mesh panel has an opposing first lateral edge 130 and a second lateral edge 140.
[0056] A person skilled in the art will appreciate various other modifications and alterations may be made to the reinforcing member and mesh panel forming the mesh assembly described above to suit different applications. Modifications to the installation method may also be made. For example, it is envisaged that the boreholes may be drilled before locating the mesh panel against the rock face.
AH26(21346333J ):MSD
2014262290 26 Sep 2018
Claims (19)
1. A mesh assembly for securing a rock face, said mesh assembly comprising:
a mesh panel longitudinally extending between a first longitudinal edge and a second longitudinal edge, said mesh panel formed of a flexible plastics material and comprising an array of longitudinally extending mesh elements and an array of laterally extending mesh elements together defining a network of apertures; wherein only a longitudinal first end portion of said mesh panel adjacent to the first longitudinal edge has a reinforcing member secured thereto, said reinforcing member extending along a face of the first longitudinal end portion of said mesh panel, and said reinforcing member having a greater flexural stiffness than said first longitudinal end portion of said mesh panel, wherein the reinforcing member extends both longitudinally and laterally along the face of the first longitudinal end portion.
2. The mesh assembly of claim 1 wherein said reinforcing member extends laterally across substantially an entire lateral width of said mesh panel.
3. The mesh assembly of either one of claims 1 and 2 wherein said reinforcing member extends longitudinally across at least three rows of said apertures.
4. The mesh assembly of any one of claims 1 to 3, wherein said reinforcing member has one or more openings exposing a plurality of said apertures.
5. The mesh assembly of any one of claims 1 to 4, wherein said mesh panel is rolled about a laterally extending axis to form a mesh roll with said first longitudinal end portion of said mesh panel projecting from said mesh roll.
6. The mesh assembly of claim 5, wherein said mesh roll is retained in the rolled form by way of one or more ties.
7. The mesh assembly of any one of claims 1 to 6, wherein said reinforcing member comprises a reinforcing mesh formed of an array of longitudinally extending reinforcing elements and an array of laterally extending reinforcing elements.
8. The mesh assembly of claim 7, wherein said longitudinally extending reinforcing elements are generally aligned with said longitudinally extending mesh elements of said mesh panel and
AH26(21346333J ):MSD
2014262290 24 Sep 2018
9. The mesh assembly of either one of claims 7 and 8, wherein said reinforcing mesh is tied to said mesh panel.
10. The mesh assembly of any one of claims 7 to 9, wherein said reinforcing elements are formed of a fibre reinforced plastics material.
11. The mesh assembly of any one of claims 7 to 9, wherein said reinforcing elements are formed of steel.
12. The mesh assembly of any one of claims 1 to 6, wherein said reinforcing member comprises a reinforcing frame.
13. The mesh assembly of claim 12, wherein said reinforcing frame is formed of a plastics material.
14. The mesh assembly of claim 12, wherein the reinforcing frame is be formed of a fibre reinforced plastics material.
15. The mesh assembly of claim 12, wherein said reinforcing frame is formed of steel.
16. A method of installing the mesh assembly of any one of claims 1 to 15 against a rock face, said method comprising the steps of:
a) locating said first longitudinal end portion of said mesh panel against the rock face;
b) drilling a plurality of bore holes into the rock face;
c) installing a plurality of rock bolts, through apertures of said mesh panel at or adjacent said first longitudinal end portion, into each of said plurality of boreholes, with a plate washer mounted on each of said rock bolts securing said mesh panel against the rock face; and repeating steps a) to c) for successive portions of said mesh panel.
17. The method of claim 16 wherein step a) is carried out before step b), each of said boreholes being drilled through an aperture of said mesh panel at or adjacent said first longitudinal end portion.
18. The method of claim 16 wherein step b) is carried out before step a).
AH26(21302513_l):MSD
2014262290 24 Sep 2018
19. The method of any one of claims 16 to 18 wherein said mesh panel is unrolled from a rolled form as successive portions of said mesh panel are located against the rock face.
DYWIDAG-Systems International Pty Limited Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON
AH26(21302513_l):MSD
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014262290A AU2014262290B2 (en) | 2013-11-18 | 2014-11-17 | A mesh assembly |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2013904449A AU2013904449A0 (en) | 2013-11-18 | A mesh assembly | |
| AU2013904449 | 2013-11-18 | ||
| AU2014262290A AU2014262290B2 (en) | 2013-11-18 | 2014-11-17 | A mesh assembly |
Publications (2)
| Publication Number | Publication Date |
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| AU2014262290A1 AU2014262290A1 (en) | 2015-06-04 |
| AU2014262290B2 true AU2014262290B2 (en) | 2018-10-25 |
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|---|---|---|---|
| AU2014262290A Active AU2014262290B2 (en) | 2013-11-18 | 2014-11-17 | A mesh assembly |
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| AU (1) | AU2014262290B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834701A1 (en) * | 1988-10-12 | 1990-04-19 | Johannes Radtke | Composite textile mat |
| US5277520A (en) * | 1991-12-06 | 1994-01-11 | The Tensar Corporation | Grid composite for backfill barriers and waste applications |
| WO2008087537A2 (en) * | 2007-01-18 | 2008-07-24 | Skarboevig Nils Mittet | A support net for underground mine supports |
| AU2012258344A1 (en) * | 2011-11-29 | 2013-06-13 | The Australian Steel Company (Operations) Pty Ltd | A mesh assembly |
-
2014
- 2014-11-17 AU AU2014262290A patent/AU2014262290B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834701A1 (en) * | 1988-10-12 | 1990-04-19 | Johannes Radtke | Composite textile mat |
| US5277520A (en) * | 1991-12-06 | 1994-01-11 | The Tensar Corporation | Grid composite for backfill barriers and waste applications |
| WO2008087537A2 (en) * | 2007-01-18 | 2008-07-24 | Skarboevig Nils Mittet | A support net for underground mine supports |
| AU2012258344A1 (en) * | 2011-11-29 | 2013-06-13 | The Australian Steel Company (Operations) Pty Ltd | A mesh assembly |
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|---|---|
| AU2014262290A1 (en) | 2015-06-04 |
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Owner name: DSI UNDERGROUND AUSTRALIA PTY LIMITED Free format text: FORMER NAME(S): DYWIDAG-SYSTEMS INTERNATIONAL PTY LIMITED |