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 .

Introduction of Mine Roof Support /Underground Roof Support

1 The profile, centerline and elevation of the excavation section should be checked before the Steel Arch Support installation.

U channel steel support cross section is shaped like the letter "U" in English. National production of u-shape cross-section shape, geometric parameters and material is different, at present China''''

Salient Features And Advantages Of 25u Underground Roof Support.

Precautions And Sequence Of Moving Operation Of Steel Arch Support