岩石破坏的能量分析初探谢和平.pdfVIP

24 15 Vol.24 No.15 2005 8 Chinese Journal of Rock Mechanics and Engineering Aug .2005 12 2 2 2 (1. 610065 2. 100083) TU 452 O 346.5 A 1000 6915(2005)15 2603 06 ON ENERGY ANALYSIS OF ROCK FAILURE 12 2 2 2 XIE He-ping PENG Rui-dong JU Yang ZHOU Hong-wei (1. College of Hydraulic and Hydra-electric Engineering Sichuan University Chengdu610065China 2. Key Laboratory of Fracture and Damage Mechanics of Rocks and ConcreteChina University of Mining and Technology Beijing100083China) Abstract On the viewpoint of energythe deformation and failure process of rock are studied. The behavior of energy dissipation and energy release during this process is also discussed. Theoretical and laboratory experimental studies indicate that energy plays an important role during rock deformation and failure. Rock failure is caused by the abrupt energy releasewhich is the catastrophe of energy dissipation under a certain condition. From the viewpoint of mechanics rock deformation and failure process are processes from local dissipation to part failure and eventually to whole catastrophe in additionfrom the viewpoint of thermodynamicsthis process is an irreversible process which includes energy dissipation and energy release. Current mechanics theories emphasize the energy dissipation and part breakage however the main feature of rock failure is energy release. Therefore it is necessary to consider synthetically the effect of energy dissipation and energy release. Laboratory studies in the paper also demonstrate that the rock failure feature can not be