CA2631381C - High-carbon chain link fence for mining industry - Google Patents
High-carbon chain link fence for mining industry Download PDFInfo
- Publication number
- CA2631381C CA2631381C CA 2631381 CA2631381A CA2631381C CA 2631381 C CA2631381 C CA 2631381C CA 2631381 CA2631381 CA 2631381 CA 2631381 A CA2631381 A CA 2631381A CA 2631381 C CA2631381 C CA 2631381C
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- chain link
- fence
- link fence
- diameter
- steel wires
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- Fencing (AREA)
Abstract
The present invention relates to a chain link type fence. The chain link type fence can be used in the mining industry, such as in a mining tunnel for tunneling and shotcrete applications. A chain link fence arranged according to the present invention advantageously can have a relatively lower weight, can be more easily manipulated and installated, can have a relatively lower thickness, and can have an increased strength and breaking load.
Description
HIGH-CARBON CHAIN LINK FENCE FOR MINING INDUSTRY
Field of the Invention [00021 The present invention relates to a chain link type fence. The present invention also relates to the use of a chain link type fence in the mining industry, such as in a mining tunnel.
Background of the Invention [0003) A chain link fence is perhaps the most economical type of fencing available.
A 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:
[0004) -- 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;
[0005) -- a chain link fence with meshes having a square form with a size of 50 mm x 50 mm, formed by a steel wire having a diameter of 4.20 mm.
[0006) These existing conventional chain link fence types are widely used but have the following drawbacks:
[00071 -- the chain link fences have a relatively high weight and hence are difficult to manipulate;
[0008) - the chain link fences are made with thick steel wire having a relatively large diameter, which results in thick meshes;
[0009] -- the chain link fences have a relatively low strength.
I
[0010] When used in the mining industry, these existing conventional chain link fences may not provide a sufficient reinforcement, as illustrated by FIGURE
1.
[0011] 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.
[0012] 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. Furthermore, the applications mentioned in US
'869 are not tunneling applications, such as in mining, and do not use shotcrete.
[0013] 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 content of the mesh.
SUMMARY OF THE INVENTION
[0014] An object of the present invention is to provided a use of a chain link type of fence to reinforce a tunnel, the chain link type of fence having steel wires having a carbon content ranging from 0.45 percent by weight to 0.57 percent by weight and having a diameter ranging from about 3.50 mm to about 4.0 mm.
Field of the Invention [00021 The present invention relates to a chain link type fence. The present invention also relates to the use of a chain link type fence in the mining industry, such as in a mining tunnel.
Background of the Invention [0003) A chain link fence is perhaps the most economical type of fencing available.
A 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:
[0004) -- 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;
[0005) -- a chain link fence with meshes having a square form with a size of 50 mm x 50 mm, formed by a steel wire having a diameter of 4.20 mm.
[0006) These existing conventional chain link fence types are widely used but have the following drawbacks:
[00071 -- the chain link fences have a relatively high weight and hence are difficult to manipulate;
[0008) - the chain link fences are made with thick steel wire having a relatively large diameter, which results in thick meshes;
[0009] -- the chain link fences have a relatively low strength.
I
[0010] When used in the mining industry, these existing conventional chain link fences may not provide a sufficient reinforcement, as illustrated by FIGURE
1.
[0011] 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.
[0012] 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. Furthermore, the applications mentioned in US
'869 are not tunneling applications, such as in mining, and do not use shotcrete.
[0013] 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 content of the mesh.
SUMMARY OF THE INVENTION
[0014] An object of the present invention is to provided a use of a chain link type of fence to reinforce a tunnel, the chain link type of fence having steel wires having a carbon content ranging from 0.45 percent by weight to 0.57 percent by weight and having a diameter ranging from about 3.50 mm to about 4.0 mm.
Brief Description of the Drawings [0017] FIGURE 1 illustrates a failure mode of a prior art chain link fence.
[ools] FIGURE 2 illustrates a chain link fence in a mining tunnel, according to an embodiment.
[0019] FIGURE 3 illustrates a chain link fence in a mining tunnel, according to an embodiment.
[0020] FIGURE 4 is a top view of a testing configuration for a chain link fence, according to an embodiment.
[0021] FIGURE 5 is a side view of the testing configuration of FIGURE 4.
Detailed Description [0022] 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: (1) lowering the weight of chain link fences, (2) facilitating the manipulation and installation of chain link fences, (3) lowering the thickness of a chain link mesh, and (4) increasing the strength and breaking load of a chain link mesh.
[0023] According to an embodiment, a chain link fence can be made of steel wires 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 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.
[0024] 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.
[0025] 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.
[0026) 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 / m2. 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 / m2. Furthermore, a 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 / m2.
[0027] A chain link fence arranged according to the embodiments and examples described herein can have a lower weight per square meter. By using smaller diameter 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 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 increased strength, such as tensile strength, and higher breaking load, despite the use of 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.
[ools] FIGURE 2 illustrates a chain link fence in a mining tunnel, according to an embodiment.
[0019] FIGURE 3 illustrates a chain link fence in a mining tunnel, according to an embodiment.
[0020] FIGURE 4 is a top view of a testing configuration for a chain link fence, according to an embodiment.
[0021] FIGURE 5 is a side view of the testing configuration of FIGURE 4.
Detailed Description [0022] 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: (1) lowering the weight of chain link fences, (2) facilitating the manipulation and installation of chain link fences, (3) lowering the thickness of a chain link mesh, and (4) increasing the strength and breaking load of a chain link mesh.
[0023] According to an embodiment, a chain link fence can be made of steel wires 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 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.
[0024] 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.
[0025] 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.
[0026) 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 / m2. 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 / m2. Furthermore, a 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 / m2.
[0027] A chain link fence arranged according to the embodiments and examples described herein can have a lower weight per square meter. By using smaller diameter 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 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 increased strength, such as tensile strength, and higher breaking load, despite the use of 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.
[0028) 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.
[0029] 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.
[0030] 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.
[0031] 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 20 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.
[0032] 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 30 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.
[0033] 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 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.
[0034] FIGURE 5 is a side view of the testing configuration of FIGURE 4. As shown in 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.
[0035] Conventional 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.
[0036] 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.
[0037] 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.
[0029] 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.
[0030] 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.
[0031] 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 20 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.
[0032] 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 30 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.
[0033] 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 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.
[0034] FIGURE 5 is a side view of the testing configuration of FIGURE 4. As shown in 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.
[0035] Conventional 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.
[0036] 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.
[0037] 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.
Claims (4)
1. Use of a chain link type of fence to reinforce a tunnel, said chain link type of fence having steel wires having a carbon content ranging from 0.45 percent by weight to 0.57 percent by weight and having a diameter ranging from about 3.50 mm to about 4.0 mm.
2. Use according to claim 1, wherein said steel wires have a composition corresponding to SAE1050.
3. Use according to claim 1, wherein said chain link type of fence comprises meshes, said meshes having a square form Y mm x Y mm, where Y ranges from about 60 mm to about 90 mm.
4. Use according to claim 1, wherein said steel wires have a diameter of about 4.0 mm or less.
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 |
|---|---|
| CA2631381A1 CA2631381A1 (en) | 2008-11-21 |
| CA2631381C true CA2631381C (en) | 2011-07-26 |
Family
ID=40030435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2631381 Expired - Fee Related CA2631381C (en) | 2007-05-21 | 2008-05-16 | 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 |
| AU2008202218A1 (en) | 2008-12-11 |
| CA2631381A1 (en) | 2008-11-21 |
| CL2008001472A1 (en) | 2008-09-22 |
| PE20090077A1 (en) | 2009-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20190516 |