Anchor bolt is a kind of support product that is commonly used in coal mine support system. The rock bolt is composed of bolt body, pallet, nut and other accessories. These accessories are fully utilized in the coal mine support system, efficacy is indispensable.

The bolt body of the anchor rod is heated and dry-solidified by glass fiber, epoxy resin, and epoxy curing agent. The anchor bolt body is full external thread, and the rotation direction of the external thread is left-handed or right-handed external thread. The anchor rod is in the supporting system. The actual effect in the software is remarkable. It is the result of the mutual cooperation between the hollow grouting mine plate for rock bolt and the tray nut. So, what are the functions of the pallet in the anchor rod? What issues should be paid attention to when choosing pallets?

1. The mine plate for rock bolt must release the relative torque for the nut so that the pallet can clamp the surface of the coal road, show a certain pre-tightening force to the hollow grouting bolt, and let the pre-tightening force spread to the periphery of the hollow grouting bolt In the coal and rock, thereby improving the in-situ stress of the surrounding rock, it can reasonably restrain the separation of the surrounding rock, the drag of the tectonic surface and the expansion of joint cracks, and finally complete the consciousness and timeliness of the hollow grouting bolt support.

2. The surrounding rock is deformed and the load effect is transferred to the backing mine plate for rock bolt. With the aid of the tray, the load is transferred to the rod body of the hollow grouting bolt, so as to increase the frictional resistance of the hollow grouting bolt during the work and let the hollow grouting bolt Make full use of the effect of manipulating the deformation of surrounding rock.