The underground roof support is a passive support for underground coal mine support. It has high tensile strength and compressive strength. At the same time, it has good toughness performance, high support force and strong support strength. It can be used multiple times.
The main features of the underground roof support: high pressure resistance, long support time, easy installation and deformation.
Underground roof support are more scalable and stable than other rigid brackets. They can bear the load and deformation of soft surrounding rocks, have high cross-section utilization, easy bracket support, small maintenance, and high recycling rates. The use of pit wood has very obvious environmental benefits.
The stress state of the underground roof support is that the wall is filled and compacted to make it evenly compressed. When the pressure of the surrounding rock on the U-shaped steel support reaches a certain value, the support will compress and the surrounding rock acts on the U-shaped steel support The pressure on the wall is reduced, so as to prevent the pressure of the surrounding rock from being greater than the bearing capacity of the underground roof support and the support to be damaged.
According to the specific conditions of the site, flexibly choose the model, structural form and shed distance of the underground roof support, correctly guide the construction of the u-shaped steel support of the roadway, ensure its effective and reliable work, and speed up the tunneling speed and reduce the amount of later repairs of the roadway to ensure that It is of great significance to safely produce, extend the service life, obtain better technical and economic benefits, and give full play to the support performance of the bracket.
