The underground roof support has the characteristics of high pressure, long support time, easy installation and not easy to deform. It is a kind of steel with a cross-sectional shape like the English letter "U". The cross-sectional shapes, geometric parameters, and materials of underground roof supports produced in various countries are different. Currently, U-shaped steel models produced in China mainly include U18, U25, U29, and U36. Among them, U18 and U25 belong to waist positioning; U29 and U36 belong to ear positioning. Due to its low carrying capacity, U18 is rarely produced.
underground roof support are mainly used for mine tunnels, secondary support of mine tunnels, and support for mountain tunnels. The underground roof support bracket has the characteristics of high pressure, long support time, easy installation and not easy to deform. The use of underground roof supports has the characteristics of high pressure, long support time, easy installation and not easy to deform. It can effectively reduce the occurrence of roof fall, slabs and other accidents, is safe and reliable, and improves the stability of the mine ventilation system.
Compared with other rigid supports, the underground roof support are more retractable and stable and reliable in load-bearing capacity, adapt to the load and deformation of soft surrounding rocks, have high section utilization, convenient support retraction, high support reuse rate, reduced use of pit wood, and environmental protection benefits It's very obvious.
