Abstract: Based on the rock dynamic destabilizing phenomena, the mechanical model of two rocks system was established. The destabilizing condition and process of two rocks system were analyzed, and rock dynamic destabilizing critical condition was given to strictly confirm the end of rock dynamic destabilization. The elastic energy release illustration in paper contains high amounts of information. Together with load-displacement of bodyⅠ, the elastic energy releasing characteristics of rock dynamic destabilization was described by image. The result showed that: bodyⅠcurve index m and body Ⅱ stiffness kn are two important factors which impact the elastic energy release of rock dynamic destabilization, and either m increases or kn decreases can lead to the increase of elastic energy release. 

Key words: Rock dynamic destabilization, Two rocks system, Critical condition, Elastic energy release