The mine roof support can not only bear the load of the upper wall rock, but also bear the load of the wall rock between the steel arch. In order to better play the role of steel arch, mine roof support is necessary to improve the quality of tunnel forming and ensure that the steel arch and tunnel excavation contour line are closely attached.
Generally, the construction of mine roof support is completed in the pipe shed and the leading small conduit, and the construction is not carried out until the earthwork excavation reaches a certain degree. The arrangement of roof support and earthwork excavation is quite close, and the continuous operation is to prevent the deformation of surrounding rocks above due to the problem of process connection.
Mine roof support the steel composite assembled to form a whole, to support the tunnel, to ensure the safety of its infrastructure, because the steel has the characteristic such as strength, stiffness big, in the construction is completed in a timely manner to form a whole, ensure no too much above the soil and rock mass deformation, it is relatively simple and rapid to construction.
