The tunnel roof support is a relatively special steel profile, and its characteristics can be seen from the name, which plays a supporting role in the underground. In specific applications, the tunnel roof support mainly plays a key supporting role in the mine tunnel (lane).
Tunnel roof support structure composition
1. The top beam.
The top beam is arc-shaped, and its number is divided into 1 section and multiple sections depending on the size of the tunnel section, the stress of the support, and the transportation conditions.
2. Column legs.
There are three types of column legs, one is the upper part is arc-shaped, and the lower part is a straight segment; the second type is all curved and has only one radius of curvature; the third is all curved, but has two curvatures radius. The base is welded under the column legs, and the size of the base depends on the hardness of the bottom plate;
3. Connection pieces.
The connecting piece is a clamping device between the bracket section and the section, which can play the role of connection between the sections, and can also compress the part of the connected two section steel joints to provide a pretension force, so that there is friction between the U-shaped steel, thereby ensuring The arched bracket has a certain working resistance and a certain amount of shrinkage.
4. Tie rods between racks.
The function of the inter-frame tie rod is to enhance the overall relative stability of the bracket and connect the bracket from the longitudinal direction to form a whole.
5. Backing material.
The backing material is the filling material between the tunnel roof support and the surrounding rock. The purpose is to make the U-shaped steel support closely contact with the surrounding rock, improve the stress condition of the support, improve its bearing capacity and maintain the stability of the surrounding rock.
Talking about its practicality and supporting effect, the tunnel roof support is not a flower shelf. Tunnel roof support can be combined with various types of monomers and metal pillars to form a metal support for the coal mine at a horizontal and gently inclined working face and machine Head or other larger top control area. It has created favorable conditions for improving the construction environment and adopting new coal mining machinery and bendable conveyors.
