Tunnel roof support is a kind of passive support for coal mine support, with high tensile strength and compressive strength, as well as good toughness. The composition of the tunnel roof support inclu

Underground roof supports are mainly used for mine tunnels, secondary support of mine tunnels, and support for mountain tunnels. It is reliable, effectively reduces the occurrence of accidents such as

The mining support arch produced by China Coal Group strictly implements relevant industry standards. The products are the first to use standardized technology to produce, and their quality is highly

Steel arch support is a very popular support tool at present. It is composed of a steel support and a combination of tray nuts. It is widely used in coal mine roadways, mine support, and underground t

Steel mine support is a kind of passive support, with high tensile strength and compressive strength, as well as good toughness, high supporting force, strong support strength, and can be used multipl

The stress state of the tunnel roof support is that the back wall is filled and compacted to make it evenly compressed. When the pressure value of the surrounding rock used for the tunnel roof support