The rigid ultimate equilibrium method is the common calculating method for rock-bolt crane girder design. A main shortcoming of this calculating method is that the common calculating method cannot consider the deformation of the structure and the action between the rock-bolt crane girder and rock wall. Based on the analysis of the common calculating method of rock-bolt crane girder

some problems of the design methods are identified; and a new calculating method for rock-bolt crane girder which has involved deformation of rock wall

deformation of rock bolt and displacement of the crane girder is established. Meanwhile

a method for determining the coefficient of elastic counter force of rock wall is suggested. And a formula for calculating the level elastic stiffness coefficient of rock bolt is also set up by utilizing numerical method to simulating the pull-out test for rock bolts. In the last part

three examples are calculated using the normal method and the new one; and the results are compared with those from the numerical method.