29U Steel Arch Support
ABOUT US
Main use: Mainly used for mine roadway, secondary support of mine roadway, and support and support of tunnels through mountains. U-shaped steel is a steel with a cross-section like the English letter "U", sometimes in the shape of the Japanese letter "ひ".
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Suitable For Narrow Space
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No Pollution And No Emission
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Product Description
U-shaped steel support is a kind of passive support for coal mine support. It has high tensile strength and compressive strength, and has good toughness performance, high support force and high support strength. It can be used many times and is widely used. In mine roadway, especially in deep complex roadway and soft coal seam roadway.
Explanation of u-shaped steel support steps
1. U-shaped steel support U-shaped steel support is simple in structure, strong in support capacity, removable, and reusable. It is a mine underground support equipment. At present, there are three types of commonly used models, U25 and U36; During safe u-shaped mining, the coal mine only needs to prepare for driving the column in advance, then the outgoing roof is supported by anchor cable on the anchor bolt, and the U-shaped cover is used on both sides of the roof to support the roof with wood, and then the frequency maintenance of the roof is strengthened to open the u-shaped soft rock in the unstable thick coal seam. Compared with other rigid supports, U-shaped steel supports have the characteristics of scalability and reliability, adapt to the load and deformation of soft surrounding rock, have high section utilization rate, convenient support back, small maintenance, high bracket recycling rate, reduce the use of pit materials, and have obvious environmental benefits.
2. U-shaped steel support, u-shaped steel support in the application of mining roadway bifurcation point has achieved remarkable results, by the majority of mining machinery industry.
Experience summary of u-shaped steel support
1. The main characteristics of u-shaped steel support for mining: large pressure, long time of support point, easy assembly and difficult replacement.
2. U-shaped steel support, u-shaped steel support in the application of mining roadway bifurcation point has achieved remarkable results, by the majority of mining machinery industry. In fact, the "U" shaped U-shaped container is designed to achieve a better stress state. After the pipe wall is filled and compacted, it will be uniformly compressed. For the surrounding rock pressure value at a certain time on the U-shaped container, the support can be compressed to relieve the pressure from the outside and reduce the risk of mining under operation. Under high pressure, the u-shaped steel support has a long supporting time, and is easy to install and not easy to deform.
The best stress state of the U-shaped steel bracket is that the back wall is filled and compacted to make it press evenly.
When the pressure value of the surrounding rock applied to the U-shaped steel bracket reaches a certain value, the bracket will be compressed, so that the surrounding rock acts on the U-shaped steel bracket.
The pressure on the steel bracket is reduced, so as to avoid the damage of the bracket due to the pressure of the surrounding rock being greater than the bearing capacity of the u-shaped steel bracket.
Compared with other rigid supports, U-shaped steel supports have shrinkability, stable and reliable bearing capacity, adapt to the load and deformation of soft surrounding rock, high section utilization rate, convenient support support, small maintenance, high support recovery and reuse rate, and reduce pits.
The use of wood has obvious environmental benefits
Product Parameters
Size | Material | Theoretical weight (kg/m) | cross-sectional area (cm2) | Height | Thickness | Width | Leg thickness |
25U
| Q275B/ 20Mnk | 24.95 | 31.79 | +1.0 120 -1.5 | +0.5 15 -1.2 | +1.0 130 -3.0 | +0.8 6.3 -0.5 |
29U
| Q275B/ 20Mnk | 29.00 | 37.00 | +1.0 124 -1.5 | +0.5 16 -1.2 | +1.0 150.5 -3.0 | +0.8 7.2 -0.5 |
36U
| 20Mnk | 35.87 | 45.70 | +1.0 138 -1.5 | +0.5 17 -1.2 | +1.0 171 -3.0 | +0.8 7.8 -0.5 |
40U | 20Mnk | 40.05 | 51.02 | +1.0 149 -1.5 | +0.5 20.2 -1.2 | +1.0 171 -3.0 | +0.8 8.5 -0.5 |
