U-shaped steel arch is a kind of support tool, which is widely used in mine roadways. It has incomparable advantages in complex areas deep in roadways or in loose coal seam roadways. It has good mechanical properties, high tensile strength and compressive strength, and also has good toughness properties. The initial supporting force is high, and the support strength is large. Generally it can be used multiple times.

The U-shaped steel arch is mainly made of U-shaped steel. After U-shaped steel is cold-formed, it needs to be cut and then connected with U-shaped steel clamps. It is a type of steel whose cross-sectional shape is like the English letter "U". The cross-sectional shape, geometric parameters, and materials of U-shaped steel produced in different countries are different. Currently U-shaped steel models produced in China mainly include U18, U25, U29, U36.

Advantages of U-shaped Steel Arch :

1. Withstand large pressure, long support time, easy installation and deformation;

2. Compared with other rigid supports, it has shrink ability and stable bearing capacity, and can adapt to the load and deformation of soft surrounding rock;

3. High cross-section utilization, easy bracket support, and small maintenance;

4. The recycling rate is high, the use of pit wood is reduced, and the environmental protection benefit is obvious.

When using U-shaped steel arches, it is necessary to flexibly select the U-shaped steel arch model, structural form and shed distance according to the specific application, to correctly guide the construction of U-shaped steel arches in the roadway, to ensure its effective and reliable work, and to speed up the roadway. Driving speed, reducing the amount of roadway repairs later, ensuring safe production, extending service life, obtaining better technical and economic benefits, and giving full play to the support performance of the support are of great significance.

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