Abstract: In order to govern the disasters produced by induced rockburst in roadway, the dominate relationship between static stress and dynamic stress of induced rockburst in roadway is expounded based on the mechanical mechanism. The mechanism of Induced rockburst occurred in roadway is revealed; and the expressions of maximum principal stress and minimum principal stress superimposed by quadratic stress field of surrounding rock and different kinds of stress waves occurred in coal roadways are obtained by superimposing the quadratic stress field of surrounding rock and the dynamic stress produced by hypocenter. Given the two aspects of high stress difference and bump-prone of roadway surrounding rock, a judgment method of induced rockburst occurred in roadway is put forward. As a result, the rockburst and burst range can be judged out directly when occurring in specific depth of the roadway, the hypocenter locating in certain place and generating a certain amount of stress wave. The mechanism of wide-ranging burst produced nearby the roadway group is explained; and the reason why the heading face in a coal mine in Shandong province occurred rockburst is analyzed successfully. The research results provide a theoretical basis for analyzing the risk of induced rock-burst, and a technical way to governance induced rock-burst.

Key words: induced rockburst, initiatived rockburst, stress waves, static stress and dynamic stress, stress superposition, high stress difference