Therefore, it is often used to make roadway shrinkable steel mine supports for mine roadway, secondary support of mine roadway, and support support for mountain tunnels. Protection and other purposes.

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

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

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

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