40U Underground Steel Arch Support
ABOUT US
U-shaped steel is named because its cross section is very similar to the English letter "U".U-shaped steel is also called mine support steel, which is mainly used to make U-shaped steel brackets or arched steel sheds, which are used in coal mine tunnels and roadway support.
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Mining Underground Explosion-proof
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High Working Efficiency Energy Saving
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Product Description
U-shaped steel is named because its cross section is very similar to the English letter "U".
U-shaped steel is also called mine support steel, which is mainly used to make U-shaped steel brackets or arched steel sheds, which are used in coal mine tunnels and roadway support.
U-shaped steel can be divided into: 25U-shaped steel, 29U-shaped steel, 36U-shaped steel, and 40U-shaped steel according to the weight of the meter. U-shaped steel can be divided into different lengths: 8-meter-long U-shaped steel, 9-meter-long U-shaped steel, 10-meter-long U-shaped steel, 11-meter-long U-shaped steel, and 12-meter-long U-shaped steel.
Experience summary of u-shaped steel support
1. The U-shaped U-shaped container design of U-shaped steel support is actually 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. 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. The main characteristics of u-shaped steel support for mining: large pressure, long time of support point, easy assembly and difficult replacement.
Explanation of u-shaped steel support steps
1. U-shaped steel support cable tray is also called cable tray. In foreign countries, cable tray was widely used in the 1970s. The main characteristics of mining u-shaped steel support are: large pressure, long time of support point, easy assembly and not easy replacement.
2. 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.
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 |
