AU2008202218A1 - High-carbon chain link fence for mining industry - Google Patents
High-carbon chain link fence for mining industry Download PDFInfo
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- AU2008202218A1 AU2008202218A1 AU2008202218A AU2008202218A AU2008202218A1 AU 2008202218 A1 AU2008202218 A1 AU 2008202218A1 AU 2008202218 A AU2008202218 A AU 2008202218A AU 2008202218 A AU2008202218 A AU 2008202218A AU 2008202218 A1 AU2008202218 A1 AU 2008202218A1
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- chain link
- fence
- link type
- link fence
- tunnel
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- Fencing (AREA)
Description
S&F Ref: 858987
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address of Applicant Actual Inventor(s): Address for Service: Invention Title: NV Bekaert SA, of Bekaertstraat 2 Zwevegem, B-8550, Belgium Hector Paredes Montecinos Spruson Ferguson St Martins Tower Level 31 Market Street Sydney NSW 2000 (CCN 3710000177) High-carbon chain link fence for mining industry The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(1243250_1) 00 HIGH-CARBON CHAIN LINK FENCE FOR MINING INDUSTRY Field of the Invention The present invention relates to a chain link type fence. The present invention C1 5 also relates to the use of a chain link type fence in the mining industry, such as in a mining tunnel.
00oO SBackground of the Invention A chain link fence is perhaps the most economical type of fencing available. A oO 0o conventional chain link fence is usually made of plain low carbon steel that has a carbon content of 0.15 per cent by weight or lower. The following types of chain link fence are common: a chain link fence with meshes having a square form with a size of 100 mm x 100 mm, formed by a steel wire having a diameter of 5.10 mm; a chain link fence with meshes having a square form with a size of 50 mm x mm, formed by a steel wire having a diameter of 4.20 mm.
These existing conventional chain link fence types are widely used but have the following drawbacks: the chain link fences have a relatively high weight and hence are difficult to manipulate; the chain link fences are made with thick steel wire having a relatively large diameter, which results in thick meshes; the chain link fences have a relatively low strength.
When used in the mining industry, these existing conventional chain link fences may not provide a sufficient reinforcement, as illustrated by FIGURE 1.
FIGURE 1 shows a prior art chain link fence 10 reinforcing the ceiling 12 of a mine. Due to the low strength of chain link fence 10, this fence 10 is not able to maintain the integrity of the ceiling 12 and hold stone material 14 for a sufficiently long period of time. Because of the weakness of the chain link fence 10, the fence 10 fails at its weakest spot and the stone material 14 pours down into the mine.
US patent US-A-2,188,869 discloses a so-called high-carbon fence. The exact carbon content, however, is not mentioned. Nor is the disclosed fence a chain link fence.
1238476-2:KLJ 00 Furthermore, the applications mentioned in US '869 are not tunneling applications, such as in mining, and do not use shotcrete.
German utility model DE-U-296 06 610 discloses a hexagonal mesh for use in tunnels and mining. However, the utility model is silent with respect to the carbon N, 5 content of the mesh.
00 Object of the Invention (-i It is the object of the present invention to substantially overcome or ameliorate one or more of the disadvantages of the prior art.
00 Summary of the Invention According to an embodiment, a chain link type of fence with steel wires can have a steel composition with a carbon content above 0.45 per cent by weight.
According to an embodiment, a tunnel can be reinforced by means of a chain link type of fence with steel wires that can have a steel composition with a carbon content above 0.45 per cent by weight.
According to an embodiment, a method of using a chain link type of fence to reinforce a tunnel can be practiced by providing a chain link type of fence with steel wires that can have a steel composition with a carbon content above 0.45 per cent by weight and reinforcing the tunnel with the chain link type of fence.
Brief Description of the Drawings Preferred embodiments of the invention will be described hereinafter, by way of examples only, with reference to the accompanying drawings.
FIGURE 1 illustrates a failure mode of a prior art chain link fence.
FIGURE 2 illustrates a chain link fence in a mining tunnel, according to an embodiment.
FIGURE 3 illustrates a chain link fence in a mining tunnel, according to an embodiment.
FIGURE 4 is a top view of a testing configuration for a chain link fence, according to an embodiment.
FIGURE 5 is a side view of the testing configuration of FIGURE 4.
1238476-2:KLJ 00 Detailed Description The present invention relates to a chain link fence. The fence can be used in the mining industry, such as in tunneling and shotcrete applications. Aspects of the present invention include: lowering the weight of chain link fences, facilitating the N, 5 manipulation and installation of chain link fences, lowering the thickness of a chain link mesh, and increasing the strength and breaking load of a chain link mesh.
00 0 According to an embodiment, a chain link fence can be made of steel wires N, having a steel composition with a carbon content of 0.45 per cent by weight or more. For example, a chain link fence can be made of steel wires having a steel composition with a 00 lo carbon content of 0.45 to 0.70 per cent by weight. In another example, a chain link fence can be made of steel wires having a steel composition with a carbon content of 0.45 to 0.57 per cent by weight. In another example, a chain link fence can be made of steel wires having a steel composition with a carbon content of 0.45 to 0.55 per cent by weight.
In another example, a chain link fence can be made of steel wires having a steel composition that corresponds to SAE 1050.
According to an embodiment, a chain link fence can be made with meshes that have a square form of Y mm x Y mm. For example, Y can range from about 60 mm to about 90 mm. In another example, Y can range from about 65 mm to about 85 mm. In another example, Y can range from about 70 mm to about 80 mm. In another example, Y can be about 75 mm.
According to an embodiment, a chain link fence can be made from steel wires having a relatively small diameter. For example, a chain link fence can be made from steel wires that have a diameter of about 4.0 mm or less. In another example, a chain link fence can be made from steel wires that have a diameter of about 3.00 mm to about 4.00 mm. In another example, a chain link fence can be made from steel wires that have a diameter of about 3.25 mm to about 4.00 mm. In another example, a chain link fence can be made from steel wires that have a diameter of about 3.50 mm to about 4.00 mm. In another example, a chain link fence can be made from steel wires that have a diameter of about 3.50 mm to about 3.80 mm.
In another example, a chain link fence can be made from steel wires having a diameter of 3.66 mm and a composition corresponding to SAE 1050 to form a chain link fence with mesh squares having a size of 75 mm. Such a chain link fence weighs 2.5 kg m 2 In contrast, a 10006 fence, which is a fence with a mesh size of 100 mm x 100 mm made from wire having a diameter 5.10 mm, would weigh 3.5 kg mI 2 Furthermore, a 1238476-2:KLJKU 00 5008 fence, which is a fence with a mesh size of 50 mm x 50 mm made from wire having a diameter of 4.20 mm, would weigh 4.8 kg inm 2 SA chain link fence arranged according to the embodiments and examples described herein can have a lower weight per square meter. By using smaller diameter N, s wire, a chain link fence can be provided with a lower thickness and weight. Furthermore, because the chain link fence has a relatively lower thickness, the chain link fence has a 00 relatively high flexibility and can be more easily formed. By using wires made from a steel composition with a relatively high carbon content, the chain link fence can have an Sincreased strength, such as tensile strength, and higher breaking load, despite the use of oO 0o steel wires with a relatively small diameter. Thus, because the chain link fence is lighter and thinner, such a chain link fence can be easily manipulated and installed while providing a chain link fence with an increased strength and breaking load.
A further advantage of a chain link fence arranged according to the embodiments and examples described herein is that less material, such as projected concrete or shotcrete, needs to be used because the fence is thinner. This provides a savings in cost due to the decreased use of materials.
According to an embodiment, a tunnel can be reinforced by a chain link fence that is configured according to any of the embodiments and examples described herein.
According to an embodiment, a method of using a chain link fence to reinforce a tunnel can be practiced by providing a chain link fence according to any of the embodiments and examples described herein and reinforcing the tunnel with the chain link fence.
FIGURE 2 illustrates a chain link fence 20 that is used in a mine 22, according to an embodiment. For example, the chain link fence 20 can be used to reinforce the ceiling and/or wall of a tunnel in the mine 22. In the example of FIGURE 2, the chain link fence is used to reinforce a ceiling about two side walls of a tunnel in a mine 22 in front of an open end of the tunnel.
FIGURE 3 illustrates a chain link fence 30 that is used in a mine 32, according to an embodiment. For example, chain link fence 32 can be used to reinforce the ceiling and/or wall of a tunnel in the mine 32. In the example of FIGURE 2, the chain link fence is used to reinforce a ceiling about two side walls of a tunnel in a mine 32 in front of an open end of the tunnel.
FIGURE 4 is a top view of a testing configuration for a chain link fence, according to an embodiment. As shown in the example of FIGURE 4, a chain link fence 40 can be connected to a testing frame 42 and a localized load 50 can be applied to a 1238476-2:KULJ 00 center 44 of the fence 40. The tested chain link fence 40 can be a 1 m x 1 m sample that is fixed to the testing frame 42. The test can be arranged to simulate a load of rocks, such as a fence would be loaded with in an underground mine.
FIGURE 5 is a side view of the testing configuration of FIGURE 4. As shown in N 5 the example of FIGURE 5, the displacement of the fence 40 caused by the load 50 can be measured, along with the amount of the load 50 itself.
00 0Conventional fences, such as chain link fences made out of 5.10 mm diameter low carbon wire that form square meshes with a size of 100 mm, have breaking loads that typically range from 3.8 tons to 5.1 tons.
00 00 An example of a chain link fence made out of steel wire with a composition corresponding to SAE 1050 with a diameter of 3.76 mm that form square meshes with a size of 75 mm have breaking loads that range from 4.9 tons to 6.2 tons.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. The embodiments were chosen and described in order to explain the principals of the invention and its practical application to enable one skilled in the art to utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein.
1238476-2:KU
Claims (9)
1. A chain link type of fence with steel wires having a steel composition with a carbon content above 0.45 per cent by weight. N 5
2. A chain link type of fence according to claim 1, wherein the carbon content ranges from 0.45 to 0.57 per cent by weight. 00
3. A chain link type of fence according to claim 1, wherein the steel Scomposition corresponds to SAE1050.
4. A chain link type of fence according to claim 1, said fence comprising 00 10 meshes, said meshes having a square form Y mm x Y mm, where Y ranges from about Smm to about 90 mm.
A chain link type of fence according to claim 1, wherein said steel wires have a diameter of about 4.0 mm or less.
6. A chain link type of fence according to claim 5, wherein said steel wires have a diameter ranging from about 3.50 to about 4.0 mm.
7. A tunnel having been reinforced by means of a chain link type of fence according to any one of claims 1 to 6.
8. A method of using a chain link type of fence to reinforce a tunnel, comprising the step of providing a chain link type of fence according to any one of claims 1 to 6 and reinforcing the tunnel with the chain link type of fence.
9. A chain link type of fence substantially as hereinbefore described with reference to FIGURES 2-5 in the accompanying drawings. Dated 19 May, 2008 NV Bekaert SA Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON
1238476-2:KU
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US92455607P | 2007-05-21 | 2007-05-21 | |
| US60/924,556 | 2007-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2008202218A1 true AU2008202218A1 (en) | 2008-12-11 |
| AU2008202218B2 AU2008202218B2 (en) | 2011-05-19 |
Family
ID=40030435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2008202218A Ceased AU2008202218B2 (en) | 2007-05-21 | 2008-05-20 | High-carbon chain link fence for mining industry |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU2008202218B2 (en) |
| CA (1) | CA2631381C (en) |
| CL (1) | CL2008001472A1 (en) |
| PE (1) | PE20090077A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191413361A (en) * | 1914-05-30 | 1915-03-11 | Harold Wade | Improvements in or relating to Wire Fences. |
| US4209153A (en) * | 1977-06-14 | 1980-06-24 | N. V. Bekaert S.A. | Functional mesh or netting |
| BE865901A (en) * | 1978-04-12 | 1978-10-12 | Bekaert Sa Nv | IMPROVED SIX-SIDE BRAIDING |
-
2008
- 2008-05-16 CA CA 2631381 patent/CA2631381C/en not_active Expired - Fee Related
- 2008-05-20 AU AU2008202218A patent/AU2008202218B2/en not_active Ceased
- 2008-05-20 CL CL2008001472A patent/CL2008001472A1/en unknown
- 2008-05-20 PE PE2008000870A patent/PE20090077A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008202218B2 (en) | 2011-05-19 |
| CA2631381A1 (en) | 2008-11-21 |
| CL2008001472A1 (en) | 2008-09-22 |
| PE20090077A1 (en) | 2009-01-31 |
| CA2631381C (en) | 2011-07-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |