Underground roof supports are mainly used for mine tunnels, secondary support of mine tunnels, and support for mountain tunnels. It is reliable, effectively reduces the occurrence of accidents such as
Principles Of Using U-shaped Tunnel Roof Supports
What Are The Advantages Of U-shaped Steel Underground Roof Support Compared To Other Brackets?
The best stress state of the U-shaped steel support is that the back wall is filled and compacted to make it press evenly. When the pressure value of the surrounding rock applied to the U-shaped steel
Supporting of soft rock tunnel excavation has been one of the key technical problems which affects the further development of coal industry production and construction of our country .