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

1. Check one by one whether the connecting parts and pins of the U-shaped tunnel roof support are complete and fastened, whether the movable cylinder body is damaged or deformed, check whether the sea

Hot-rolled U-shaped steel arch support for mine roadway support is the U-shaped tunnel roof support that everyone often calls. U-shaped steel is a kind of steel whose cross section resembles the Engli

In order to prevent the roadway from continuing to deform, causing roadway damage or landslide accidents, paving the way for the re-activation of the mine, the Mine Roof Support is generally selected,

Tunnel Roof Support is the most commonly used top beam in roadway support. Tunnel Roof Support is heat-welded with two root Steel Arch Supports. Tunnel Roof Support is mainly used for the support of c

1. The hydraulic support worker must be familiar with the performance, structure, principle and hydraulic control system of the hydraulic support, master this operating procedure, be able to maintain