The affect factors on anchoring force of resin-grouted cable bolts are numerous and complicated. And the anchoring mechanism of cable bolts is not perfect enough at now. So the supporting parameters of cable bolts are always not suitable to the roadways’ condition. As the worst case

the reinforced surrounding rock may go into failure. Based on the observed results that more and more roof rock mass is bearing fracture water

some laboratory cable-bolt pull-out tests were carried out. The main factors include anchoring length

bore-hole diameter

resin capsule packaging

water

etc. A 7-wire high-strength stranded cable was used in the tests. The research results show that there are four models of cable force vs extension. The law of axial force distribution of cable bolt is obtained; and it is some different with the conventional Mindlin distribution. The achievement is valuable to the design of roadways supporting parameters and the work mechanism of cable bolts.