Research on nonlinear mechanical behavior for deep rock mass has become the focus for current international rock mechanics community. The difficulty lies in how to describe the rock mass properties in large dynamic deformation and failure. The test reviews the research results for failure mechanism of deep rock mass, basic problems in dynamic damage process(time effect, fracture description and so on) and characteristic scientific phenomena(zonal disintegration, rock burst). And it shows that: The problems of deep rock mass are in four dimensional spaces, it is the evolution of the stress state on excavation life scale. To study on the deformation and failure mechanism of deep rock mass, the concept of time and space must be established. To reveal the real deformation and failure process at present, we must continue to study within the framework of continue mechanics based on the theory of micro-meso physics mechanics. Time parameter must be introduced in strength theory as characteristics of plastic flow and failure process, and reasonable means must be adopted to describe the fracture damage of rock mass. The zonal disintegration and rock burst are two phenomena of one scientific problems, they should be explained and simulated by a unified theory.