Underground roof support is one of the main support forms for underground engineering and rock slopes. It plays an important role in the maintenance of civil engineering stability, especially in joint

The mine roof support has retractability and stable and reliable bearing capacity, adapts to the load and deformation of the soft surrounding rock. The stress state of the roof support of the mine is

Steel arch support is a kind of steel with a cross-sectional shape like the English letter U. Steel arch support has the advantages of high setting force, strong support strength, easy installation, a

Compared with other rigid supports, mine roof supports are more retractable and stable and reliable in load-bearing capacity, adapt to the load and deformation of soft surrounding rocks, have high sec

Support arch is a kind of passive support equipment for coal mine support. Support arch has high tensile strength, high compressive strength, and good toughness, high supporting force, strong supporti

Steel arch support has the advantages of high initial support, high support strength, easy installation, and non-deformation. Therefore, it is often used to manufacture roadway shrinkable metal suppor