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 reaches a certain value, the support will be compressed and the surrounding rock will act on the tunnel roof support Therefore, the pressure of the surrounding rock is lowered, so as to prevent the support from being damaged by the pressure of the surrounding rock being greater than the bearing capacity of the tunnel top support.
The tunnel roof support is deeply loved by the mining machinery industry due to its high pressure, long support time, easy installation and non-deformation. The utilization rate of the support section of the tunnel roof is high, the support is easy to retreat, and the maintenance amount is small. Notable features such as the stability of the mine ventilation system are improved.
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 tunnel roof support to ensure its effective and reliable work. It will speed up the tunneling speed and reduce the amount of repairs in the later stage of the tunnel. Safe production, extended service life, better technical and economic benefits, and full use of the support performance of the bracket are of great significance.
