U-shaped steel arch support is a kind of passive support for underground roof support. It has high tensile strength and compressive strength, and has good toughness performance. It has high supporting

U-shaped steel arch support (full name: hot-rolled U-shaped steel for mine roadway support) U-shaped steel is a kind of steel with a cross-section like the English letter "U", and sometimes the cross-

The best stress state of the U-shaped steel arch support is that the back wall is filled and compacted to make it evenly compressed. When the pressure value of the surrounding rock used on the U-shape

Due to the collapse of coal mines, iron ore, etc., or collapse, etc., and various external factors cause deformation of some parts of the roadway, which seriously affects the safe use of mine roadways

Mine roof support can not only significantly improve the support effect of roadway, but also enhance the stability of surrounding rock. Mine roof support can also save a lot of transportation and main

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