Underground roof supports are widely used in mine roadways, especially in deep complex roadways and soft coal roadways. They have good mechanical properties, high tensile strength and compressive strength, and good toughness properties,reasonable support form.
The purpose of the underground roof support is to make the steel bracket and the surrounding rock in close contact, improve the stress condition of the bracket, improve its bearing capacity and maintain the stability of the surrounding rock. The advantages of using an underground roof support material are the high load-bearing capacity of the bracket, the high pressure received, the long support time, the difficulty of deformation, the wear resistance and the corrosion resistance.
With its own conditions and capabilities, the underground roof support maintains the mine, is under high pressure, and has a long support time. The underground roof support has the characteristics of easy installation and no deformation, and is suitable for the load and deformation of the soft surrounding rock. The utilization rate of the support section of the underground roof is high, the support of the support is convenient, and the maintenance amount is small.
