Mine roof support is a structure used to control the mine pressure in coal face. The form of pressure outside the mining surface ACTS on the roof support. In the mechanical system of the interaction between the roof support and the surrounding rock of the mining surface, the resultant force of the supports of the roof support and the external load force of the roof acting on the hydraulic support are exactly the same line.
The support mode of mine roof support is in accordance with the order of mutual action between support and supporting equipment. Instant support is to remove the frame immediately after the shearer cuts the coal, and quickly support the new exposed roof, which is widely used in various roof conditions. Lagging support is to push the conveyor first and then move the frame after coal mining. Mine roof support has a long lag time for roof support, which can only be used to stabilize the roof.
When mine roof support working normally, the maximum support force to the roof refers to the vertical support force.
