When operating the U-shaped tunnel roof support, the support worker should stand on the bottom frame of the rack box and face the coal wall to operate. It is forbidden to pedal in front of the base or

The special and complex nature of rock strata in tunnel construction requires the use of Steel Arch Support to support the tunnel and ensure its stability.

The combined support of U-shaped steel arch support, metal mesh, and shotcrete has changed the limitations of the three support forms used alone, and gave full play to the advantages of the three supp

The Installation Sequence And Method Of The Mine Face Underground Roof Support

Steel mine support is a very popular support tool at present. Steel mine support is widely used in coal mine roadway, mine support, underground tunnel engineering support and other scenes.

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 .