The process flow of U-shaped steel Underground Roof Support: placing the middle and waistline → digging the column socket → standing shed legs → upper shed beam → reinforcement → back plate (filling).
Find the position of the column socket according to the center line and the size of the designed shed, and then dig enough depth of the column socket according to the middle waistline.
Draw the position of the waistline on the column legs, and place the column in the column socket, so that the waistline on the column is consistent with the waistline on the helper.
Fix the U-shaped steel Tunnel Roof Support column with the brace to prevent it from tilting.
The required materials, construction equipment, etc. are prepared and transported to the construction site.
Careful inspection of the top plate found that the dangerous rock was removed with a long-handled tool.
Before erecting the U-shaped steel Tunnel Roof Support, the front beam should be used to control the top plate and support ahead of the excavation head.
Check the verticality and skewness of the U-shaped steel Tunnel Roof Support, and adjust it when it exceeds the allowable error range specified in the quality standard. According to the vertical line placed in the middle of the top beam and the horizontal distance between the two column feet, you can know whether the bracket is Vertical, according to whether the line between the center line of the roadway and the two columns is vertical, you can know whether the bracket is skewed.
Check the quality of the tunnel excavation project at the shed, and the under-excavation of the tunnel must be dealt with to make it meet the design requirements.
Find the middle waistline and make a mark: Use a small line to pull a middle line through the lot where the U-shaped Steel Mine Supports is to be erected, and lead the waistline to both sides to make a mark.
Back help and back top: When putting on the back board, put one piece on and fill in one piece (tighten the gap between the back board and the rock top with a wooden wedge or fill it all with rocks) and visually check whether the back board is flat. When helping, it should be done symmetrically on both sides.
Between the shed and the shed, metal tie rods are used to tightly pull each other through bolts, splints, etc. or drive into the support columns to strengthen the stability of the U-shaped Steel Mine Supports along the axis of the roadway.
Brackets and accessories: U-shaped Tunnel Roof Support, cables, bolts, tie rods and other materials, specifications, strength and processing conform to the design and relevant standards. Backplane and filling material: The material and specification meet the design requirements and regulations.
Construction equipment: sledgehammer, iron-wood hammer, steel tape measure, wooden saw, air pick, manuscript, iron milling, adjustable wrench, level.
