Mine support equipment is a common support equipment that can be recycled. It is economical and practical. The use of the Underground Roof Support effectively reduces the occurrence of accidents such as roofing and sheet metal, which is safe and reliable, and improves the stability of the mine ventilation system. The U-shaped steel shrinkable bracket is used to solve the problem of tunneling support.
Underground Roof Support is a steel with a cross-sectional shape like the English letter "U". U-shaped steels produced in different countries have different cross-sectional shapes, geometric parameters and materials. U-shaped steel models mainly include U18, U25, U29 and U36.
Underground Roof Support structure
1. Top beam.
The top beam is arc-shaped, and its number is divided into one section and multiple sections depending on the section size of the roadway, the force of the bracket, and the transportation conditions.
2. Column legs.
There are three types of legs: one is a circular arc at the top and the straight segment at the lower part; the second is all curved and has only one radius of curvature; the third is all curved, but has two curvatures. radius. A base is welded under the column leg, and the size of the base depends on the hardness of the bottom plate;
3. Connector.
The connecting piece is a clamping device between the bracket section and the inter-section, which can be used for the connection between the joints, and can also press the two sections of the connected steel joints to provide a pre-tightening force, so that the U-shaped steel has frictional force, thereby ensuring The arched bracket has a certain working resistance and a certain amount of shrinkage.
4. Racks between shelves.
The role of the inter-rack tie rod is to enhance the overall relative stability of the bracket, and the brackets are coupled from the longitudinal direction to form a whole.
5. Backing material.
The backing material is a filling material between the Underground Roof Support and the surrounding rock. The purpose is to make the Under Roof Roof Support close to the surrounding rock, improve the bearing condition of the bracket, improve its load carrying capacity and maintain the stability of the surrounding rock.
