Abstract：The influences of earthquake amplitudes，frequency and duration time on the different rock cavern displacements are primarily studied by using FLAC3D. It is found that the displacements of rock cavern clearly increase with the increasing earthquake amplitudes and duration time as well as the decreasing frequency. The changing rates of displacements with the above earthquake parameters decrease with the increasing overburden and in-situ lateral coefficient (l). It is also indicated that under shallow overburden，the threshold earthquake intensity probably exists. When the earthquake intensity reaches up to the threshold value，the cavern displacements significantly increase with the increasing earthquake amplitudes. In addition，it is revealed that the low frequency properties of earthquake have clear influence on the cavern displacement，and the cavern displacement under earthquake with low frequency is obviously larger than that at high frequency.
