Abstract：According to analysis on pulling test results of bolt and comparison of the mechanical status of anchoring segment between bolt and cable，the distribution model of shear stress along the anchoring segment of partial-cohesive cable is put forard. The shear stress reaches the maximum not right at the midpoint of anchoring segment but at side near ground surface and reduces to 0 at the ends of anchoring segment. A reasonable calculation method of the length of anchoring segment is given. The main control condition is that the maximum shear stress of anchoring segment can’t exceed the value of cohesive strength divided by safety factor. The calculation method of length of anchoring segment is shown in detail by a practical example in the paper.
