The underground roof support can be said to be the most important support profile under the coal mine and the key to roadway support. The U-shaped steel support that was laid in advance may have aging

Mine roof support can be said to be the most important support profile in coal mines and the key to roadway support. The coal mine roof support that was laid earlier may be aging and loose. The mine r

Arch supports are widely used in mine tunnels and are a type of support equipment. The shape of the arch bracket is generally U-shaped steel material. It has shrinkability, stable and reliable bearing

The steel arch support belongs to a kind of supporting equipment. It is mainly used in mine tunnel supports and has the characteristics of high-pressure steel structure. At present, the steel arch sup

29U steel support is mainly used in mine tunnels, secondary support of mine tunnels, and support and support of mountain tunnels. The use of U-shaped steel support can effectively reduce the occurren

As the national environmental protection and national policies become more and more popular, mining pits can no longer be purchased from natural pine forests but only artificial pine forests. Due to t