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

As a kind of consumable in the support field with great demand, underground roof supports are becoming more and more popular in the market. Over the years, China Coal Group has continuously improved t

The mine roof support has retractability and stable and reliable bearing capacity, adapts to the load and deformation of the soft surrounding rock, high section utilization, convenient support for sup

Support arch is a kind of passive support for coal mine support. It has high tensile strength and compressive strength, and also has good toughness performance. Support arch has high supporting force

Mine steel arch supports are mainly used in mine tunnels, railways, slopes and tunnels to reinforce the main body of the dam. Its function is mainly to ensure the stability of mine tunnels and undergr

Steel mine supports are commonly used supports in roadway support. Mine supports are mainly used for roof support of coal mine tunnels or roadways. Steel mine supports are formed by heat treatment but