关键词: 保护层, 上覆煤柱, 动载扰动

Abstract: Aiming at the analysis of the influence of residual coal pillars on the dynamic disasters in the protective layer mining area，taking Jinsheng Yong 'an Hongtai Coal Mine as the research object，the oc⁃ currence mechanism and microseismic distribution characteristics of rock burst in 40201 working face are analyzed，and the dangerous area of rock burst is divided according to the distribution of stress field. The re⁃ sults show that after the protective layer mining technology is adopted，the cumulative vibration events dur⁃ ing the monitoring period are 78 cases，and the total released energy is 9.3×104 J，showing the characteris⁃ tics of low energy and low frequency as a whole. The stress concentration area formed by the remaining coal pillars and the fault distribution of the working face significantly increase the probability of dynamic instabil⁃ ity of the surrounding rock. The overall rock burst risk on the side of the return air roadway is higher，which is characterized by wider distribution and stronger spatial continuity. The research results provide a theoreti⁃ cal basis for the subsequent production of the mine.

Key words: protective layer, overlying coal pillar, dynamic disturbance