State of the art review on mechanism and prevention of coal bumps in China

The features of coal bumps happened in Chinese coal mines were described. The definition of terminology among coal bumps,rock bursts and mine tremors were discussed. The mechanisms of coal bumps were classified into three models. These are bounce failure of openings surrounding rock or coal,translatory burst of coal seam between roof and floor or slipping burst of geologic faults,and structure sudden destabilization of an entire pillar or massive strata around mining panels. Moreover,four key issues in research point of view for fully understanding and better controlling phenomena of coal bumps were discussed. These issues involve the geological conditions relevant to coal bumps and the quantitative analysis method,the properties and engineering behaviour of discontinuous rock masses under the dynamic loading,the multi-factor coupling interaction mechanisms between coal bumps and space-time distribution of mining-induced stresses and energy in mining disturbed region,and the monitor-detect prevention and control methods of coal bumps. Finally,significant development and existing problem in controlling coal bumps in China were reviewed,and recent trends and a path forward on control of coal bumps in future were also pointed out.