This paper reviews the progress of dynamic deformation and failure effects of rock under explosion. The behavior of rock materials under intensive dynamic loading is a complex problem

but has impor- tant practical meaning. Not only physical mechanical properties of rocks

but the loading pattern determine the behavior of rocks. Besides the study of macroscopic behavior of rocks with the help of continuum mechanics

as a current trend

the study of microscopic behavior of rocks is carried out intensively. The goal of the given study lies in study of the impact of physical mechanical properties of rocks and the loading speed on the deformation and fracture of rocks in consideration of micro-macroscopic behavior.The microscopic physical kinetic mechanism of deformation and damage of materials is investigated firstly. The study shows that the deformation and damage process is the process for material particles to overcome energy barriers

the kinetic evolution equation of deformation and damage for different stress states are given

and Zhurkov’s formula

Alexandrov’s strain rate equation

damage evolution equations of Norton and Kachanov are also derived

hence their intrinsic relationship is shown . And at the same time the deformation and damage process is also a structural change process at different structural levels including micro-

meso-

and macroscopic levels. The changes at different levels have their own characteristics. At microscopic level

the deformation and damage process for polycrystalline materials is a kinetic process of generation and growth of dislocations. At mesoscopic level

the basic carriers of plastic flow are 3-di-mensional structural elements

the feature of their deformation is "shear plus rotation". At mesoscopic level

plastic deformation is related to the formation of dissipative substructures and the fragmentation of deformation

and fracture is the final stage of fragmentation of deformable bodies. At macroscopic level

the description of deformation and damage is based on continuum mechanics

but the contribution at the micro- and mesoscopic levels must be considered. The contributions at the micro- and mesoscopic levels may be considered in the governing equations by giving the plastic shear strain rate and the contribution to shear strength. At microscopic level

the shear strength of materials is determined by the evolution of dislocation continuum

but at mesoscopic level it is determined by the mesostructures and the formation of new mesoscopic substructures. Therefore in the modeling of large stress-strain curves

not only the evolution of internal microstructures

but also the formation of different substructures and their contributions to flow stress are considered.It is shown in the analysis that strength-strain speed dependency is dominated by the thermally activated mechanism in lowest strain rate region. With the increasing of strain rate

viscous mechanism will dominate gradually. In the utmost strain rate region

the thermally activated mechanism dominates again. One model of strength-strain speed dependence is suggested. One elastic-plastic model and one Mohr-Coulomb model in consideration of strength-strain speed dependence are given. In the last part of chapter constitutive relationship of porous elastic-plastic materials is investigated. Based on the thermodynamic law

Derived form free energy function by effective strain method

the brief and relatively simple equations of state of porous elastic-plastic materials under intensive dynamic loading are given

and also the equations of deviatoric deformation are given.