Self drilling rock bolt is improvement and innovation on the basis of traditional anchors. It has many advantages over traditional anchors. No need for casing. The rock anchor can be drilled in a loose soil layer or a broken rock layer without the need for a casing to secure the borehole. Since the self-drilling anchor is drilled and grouted simultaneously, there is no problem that the drill collapses and the anchor cannot be installed. Pressure grouting. By means of pressure grouting, the cement mortar is evenly distributed in the borehole and penetrates into the surrounding soil or rock layer (the so-called filter cake effect). This results in higher bond strength while allowing the soil and hollow anchor bolt to be better integrated into the softer soil layer. 3.Thread design. High-strength threaded round and trapezoidal threads provide a large, robust bolt that is ideal for rotary impact drilling and ensures a strong bond to the cement mortar in the borehole. A very effective drilling technique that ensures fast drilling speeds and good directional stability of the drill pipe.
