Based on the current situation of the deep resources exploitation at home and abroad,deep mining has become the norm owing to the exhaustion of the shallow mineral resources.Nevertheless,because of the initial property of the ‘three high’ occurrence environment of the deep rock mass and also the additional property of ‘strong disturbance’ and ‘strong timeliness’ of resource exploitation,the large-scale disasters with high energy level frequently occur in deep engineering.Meanwhile,it is difficult to predict and get an effective control because of its unclear mechanism.The essential cause of this reality is that the existing rock mechanics theories are based on the material mechanics in a static researching perspective,which has lagged behind the practice of nowadays geotechnical engineering.The existing theories are not related to the depth,the engineering activity and the deep underground in-situ environment.It has become urgent to develop new theories and methods of deep rock mechanics with consideration of deep in situ state and mining disturbance to solve the theoretical and technical problems of deep resource exploitation.In the view of China's actual situation that the exploitation of deep mineral resources will enter into a stage of 1 000~2 000 m,the project,oriented with improving the capability of deep resources acquisition,has condensed four key scientific issues:1) in-situ mechanical behavior and stress environment of deep rock mass;2) the analysis, simulation and visualization of deep rock stress field and energy field;3) coupling theory of ‘multi-fields’ and ‘multi-phases’ coexisting in deep resource exploitation under the effect of ‘strong disturbance’, ‘strong timeliness’;4) the theory and technology of high efficiency mining of deep resources with low ecological damage.Meanwhile,combining the connotation of the key scientific issues,five key researching contents have been proposed:1) in-situ mechanical behavior and stress environment of deep rock mass;2) deep mining mechanics and flow theory in ‘multi-fields’ and ‘multi-phases’;3) evolution law of stress field and energy field in deep mining;4) deformation monitoring,safety early warning and stability control of deep rock mass;5) the theory and technology of eco efficiency mining of deep mineral resources.Finally,nine researching frontiers have been specified from the five key researching contents:1) research on the in-situ mechanical behavior of deep rock mass;2) long-term stability analysis and control of deep surrounding rocks;3) deep crustal stress environment and disaster dynamics;4) flow theory of multi-fields and multi-phases under deep strong disturbance and strong timeliness of deep rock mass;5) analysis,simulation and visualization of stress field and energy field under the effect of deep mining;6) the theory of high stress induction and energy regulation in deep;7) monitoring,warning and control of rock deformation in deep mining;8) theory and technology of safe and green mining in deep mining;9) theory and technology of collaborative mining in deep metal mines.Thus,the researching system of deep rock mechanics and mining theory is initially constructed,in order to provide a theoretical basis and technical support for the exploitation of the China's deep mineral resources in the future.
