A Study on Propagation Mechanism of Fracture Systems in Rock Masses by Discontinuity Displacement Method

摘要

The main task of fracture mechanics of rock masses is the study on the propagating mechanism of frac-tures in rock masses,which can be efficiently conducted by discontinuty displacement(DD)numericalevaluation.Firstly,the element stress and displacement are analysed and the principle and steps of the numeri-cal calculation of stress intensity factor and fracture extension force are introduced.The numerical results ofparallel and echelon fracture systems,which are compared with real field fractures,are presented.Finally,asimple engineering application example is presented.