关键词: 采动, 冲击地压, 断层力学性质, 断层活化, 断层倾角

Abstract: By considering differentdip angles and different mechanical properties of fault, the effect of fault onrockburst potential in coal mining is studied numerically. The results show that the advancement length of the working face, the inclination of the fault and the mechanical properties of the fault have great influence on the occurrence of rock burst.It is concluded that, (1) the abutment pressure increases with the increase of the advancement length of the working face. The existence of fault makes the peak abutment pressure increase more pronounced. (2) The increase of the dip angle of the fault will increase the fluctuation of the normal stress and the shear stress of the fault plane. The relative slip of fault planes increases with the increase of the 〖JP2〗advancement length of the working face. (3) The increase of the fault mechanical properties can reduce the peak value of the peak abutment pressure to a certain extent. The decrease of the fault mechanical properties will hinder the transfer of the stress and increase the rock burst risk. The study can provide a reference for the evaluation of the rock burst risk induced by fault in coal mining.

Key words: Mining, Rock Burst, Mechanical Properties of Faults, Fault Activation, Fault Inclination Angle