Abstract：With the increasing of mining depth，the nonlinear dynamic mechanical phenomena，for instances，the rock blasting，gas outburst，rock rheology，and water outburst，etc.，occur with high frequency. The problems of rock mechanics caused by the deep mining engineering are the focuses in the fields of mining engineering and rock mechanics. Based on the studies of the particular geomechanical environments of deep engineering rock mass and its nonlinear mechanical characters，the conception system is put forward，which points out that the mechanical system of deep engineering rock mass is the nonlinear mechanical system，but not the linear mechanical system in shallow；and the classic theory，design method，and technology are almost entirely or partially invalid. By Using different coefficients and hazard indexes as the evaluation indexes to estimate the controlling conditions of surrounding rock masses，it can synthetically reflect the mechanical characters and engineering characters of rock masses in deep engineering.
