The energy dissipation characteristics of surrounding rock during roadway excavation
The deformation and failure of roadway surrounding rock is regarded as the result of the com-prehensive effect of energy accumulation,dissipation,and release.It is a state instability phenomenon driven by energy.Revealing the distribution law of energy in roadway surrounding rock is conducive to the safety evaluation and stability analysis of rock engineering.Based on the classical elastoplastic theory and the law of energy conservation,the relationships between elastic deformation energy,dissipation en-ergy,and external work of roadway surrounding rock are analyzed,revealing the evolution law of exter-nal work and energy.By using the Fish language programming and secondary development embedded in FLAC3D,the functionality of energy calculation in FLAC3D is extended.The accuracy and rationality of the developed energy module are verified through numerical examples.This energy module is applied to roadway engineering to realize the visualization analysis of the elastic deformation energy field and dissi-pation energy field of roadway surrounding rock.The influence of different section shapes and sizes on the distribution and evolution law of energy field in roadway surrounding rock is explored,and the con-centrated area of dissipation energy in roadway surrounding rock coincides with the main failure location.Analyzing the stability of roadway surrounding rock from an energy perspective is of great theoretical significance and practical value for the design of energy-absorbing support in roadway construction.
roadwayenergy featureFLAC3D numerical simulationenergy model
万方数据
维普
