U-shaped support arch is a kind of passive support for coal mine support. It has high tensile strength and compressive strength, good toughness, high supporting force, large supporting strength and can be used repeatedly. It is widely used. In the mine u lane, especially in deep complex roadways and soft coal seam roadways.
The optimal stress state of the u-shaped support arch is that it is evenly pressed after the wall is filled and compacted. When the pressure value of the surrounding rock on the u-shaped support arch reaches a certain value, the bracket will compress and the surrounding rock acts on the U. The pressure on the steel support is lowered, so that the surrounding rock pressure is prevented from being greater than the bearing capacity of the u-shaped steel support and the support is destroyed.
According to the specific conditions of the site, flexibly select the type, structure and shed distance of the u-shaped support arch, correctly guide the construction of the u-shaped support arch of the roadway to ensure its effective and reliable work, speed up the tunneling speed, reduce the amount of repair in the late roadway, and ensure the repair It is of great significance to safely produce, extend service years, obtain better technical and economic benefits, and give full play to the support performance of the support. Similar support products include mining steel, U-shaped steel, light rail and other mining steel. The application of U-shaped steel straight wall semi-circular arch support shed in the intersection of mining and roadway has achieved remarkable results. U-shaped steel retractable bracket is used to solve the problem of excavation support.
Compared with other rigid supports, u-shaped support arch have shrinkage, stable and reliable bearing capacity, adapt to the load and deformation of soft surrounding rock, high utilization rate of sections, convenient support of brackets, small maintenance, high recovery rate of brackets, and reduced pits. Wood use, environmental benefits are very obvious.
