What is the self drilling hollow anchor bolt

      Self drilling hollow anchor bolt is an anchoring support tool. It is commonly used in projects requiring anchoring of surrounding rock formations and soil layers before construction such as tunnel advance support, slope protection, coal mine roadway support, hydroelectric engineering, etc., and can enhance the stability of the building or form underground space. Self drilling anchor bolts can also be used for the maintenance of ancient buildings and old houses.

      Self drilling bolts can simultaneously achieve drilling, grouting, and anchoring. In front of the bolt, a drill with strong penetration ability is installed, and a suitable drill bit can be selected according to different geological conditions to achieve the best drilling effect. The hollow anchor bolt is both a drill pipe and a grouting pipe. Through pressure grouting, the cement slurry can be injected into the drill hole and the rock fine joint to achieve the best anchorage effect. After drilling, the anchor stays in the drill hole, which can increase the anchoring effect.

      Self drilling bolts have become the most popular anchoring support tools nowadays because they have the advantages of smaller working area, lower noise, and better anchoring effect than traditional bolts.