U-shaped steel support is a cross-sectional shape like the English letter "U" steel. States produced sectional shape of U-shaped, etc. geometric parameters and material vary. U25 steel support with high initial support force, supporting strength, easy to install, easy to deformation, etc., so commonly used in the manufacture of roadway retractable metal stents for mine tunnel, mine tunnel secondary support, as well as the support of branch tunnel through the mountain care and other purposes.
U25 steel support could withstand high pressure, support long time, easy to install and easy to deformation characteristics. U25 lift steel frame shed in the Ready Roadway Intersection of applications, and achieved remarkable results. Choice U25 retractable steel support bracket, solves the problem of tunneling support. U25 steel support bracket than other rigid support with a scalable and reliable carrying capacity to adapt to the load and deformation of soft rock, cross utilization is high, easy to stand back support small amount of maintenance, support recovery reuse rate, reduce prop use, environmental benefits are clear.
The arc arched roof beams, the number depending on the size of roadway, stand by force, transport conditions and different with a multi-section of the points.
Column legs with 3 types, one is the arc-shaped upper part, the lower part of line segments; second is all for the curve shape, and only one radius of curvature; third is all for the curve shape, with two curvatures radius. The following column legs welded base, depending on the size of the base plate hardness may be;
Connections between the stent and adjacent sections chucking device which can play the role of the section between the connection can also be connected to two steel compression fitting part, providing preload force, the friction force between the U-shaped, so as to ensure arch support with a certain amount of work and a certain resistance to shrinkage.
4.Frame between support
Frame is to enhance the role of inter-rod bracket overall relative stability, the bracket from the vertical link up to form a whole.
U-shaped steel backing material is filled between the bracket and the surrounding material, the purpose is to make the U-shaped steel bracket that close contact with the surrounding rock to improve the situation by force stand to increase their carrying capacity and maintain the stability of surrounding rock. U-shaped steel bracket in the design calculations must be reasonable, and when in use should be reasonable in order to ensure mine safety production and improve economic efficiency.