The initial investment of u-shaped steel support is high. In the long run, it has a good effect of forming a roadway at one time, small deformation, small maintenance amount, less material input and higher driving speed. U-shaped steel support is very worthwhile to use it.
The joints are prone to deformation, which is caused by the plastic deformation caused by the steel contact of the beam leg. Therefore, attention should be paid to the lap length and the positive and negative deviation should be controlled at 100 mm to ensure tight lap and weaken compressive strength.
The iron card is easy to break and loose, due to the high mining height of u-section steel support, more exposed support, light iron card loose, heavy broken card, this requires professional personnel before construction to strengthen the iron card, timely replacement of broken iron card to improve the compressive strength.
Pay attention to the type selection and the adjustment of the shed distance. With the change of dynamic pressure in the stope, the model, structure and scaffolding distance of u-shaped steel support should be adapted to local conditions. Large size supports should be adopted for high pressure, and the encryption support should ensure safety.
To pay attention to strictly in accordance with the standardized construction, ensure safe production, so that the support is integrated, enhanced, the overall compressive strength of u-shaped steel support.
