According to the Kelvin’s solution,considering three-dimensional stress state,the distribution formulas of normal stress and shear stress(that is
friction on the interface between the grout and the rock) along bonded length of compression type rock bolt are derived. Comparing with the in-situ experimental data
dependability of the formulas are proved. The stresses distribution along bonded length is analyzed with various parameters of soft rocks. This research offers a basis for the compression type rock bolts.