Tunnel roof support is a kind of passive support for coal mine support. It has high tensile strength and compressive strength, and also has good toughness, high supporting force and strong supporting strength. It can be used multiple times and is widely used. It is used in mine tunnels, especially in deep complex tunnels and soft coal seam tunnels.
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 on the tunnel top bracket reaches a certain value, the bracket will compress, causing the surrounding rock to act on the tunnel roof support Therefore, the pressure of the surrounding rock is lower than that of the support of the tunnel roof and the support is destroyed.
According to the specific conditions of the site, flexibly select the model, structure and shed distance of the tunnel roof support, and correctly guide the construction of the roadway U-shaped steel support to ensure its effective and reliable work. It is for accelerating the speed of the roadway and reducing the amount of repairs in the later stage of the roadway. Safe production, extended service life, better technical and economic benefits, and full play of the support performance are of great significance.
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