Mining anchor rod is a new type of anchor rod, made of spiral steel bars without longitudinal ribs that are very similar in shape to precision rolled threaded steel bars. The two transverse ribs on the steel bars are distributed in a spiral shape and can be screwed into nuts.
The rod body of mining anchor rods does not require secondary processing to tighten the threads, ensuring that the full length of the rod body is of equal strength and without weak cross-sections, overcoming the disadvantage of stress concentration and fracture caused by lateral pressure on the side of conventional anchor rods; The rod body adopts hot-rolled full-length continuous threads, with a simple production process and low cost; When supporting soft and fractured rock layers, secondary tightening can be carried out at any time to avoid the phenomenon of ordinary anchor rods being suspended and not adhering to the coal wall due to the limitation of the thread length at the head of the rod due to coal fragmentation; It is very convenient to cut different lengths of rods according to on-site needs, and can meet the needs of end anchors, extended anchors, and full length anchors.
Mining anchor rods make full use of on-site working hours, improve the timeliness of side support, timely support the fractured area before the pressure on the side is released, and place it all at once, reducing the chance of coal wall fragments falling.