Abstract：The mechanical response of highly-stressed pillars under the propagation of stress wave in deep mining is discussed by assuming that the pillars are disturbed by different peak values of dynamic stress. By using an explicit finite difference program FLAC3D，a model of numerical calculation is established for a deep mining pillar with dynamic disturbance under high stress. A cylinder pillar with a ratio of 4 between height and diameter is studied in the numerical calculation processes. The dynamic response characters of the pillar are obtained by changing the preloaded static stress. And then the effect of disturbance intensity on the stability of highly-stressed pillars is reflected by changing the different peak value of the dynamic stress wave. Through the numerical analysis of the pillar in deep mining，it is found that the stability of high stress rock mass is more distinctly influenced by the outside dynamic disturbance with the original static stress increased. Especially when the pillar is endured very high static stress，even a small dynamic disturbance may lead to its plastic destroying and result in a domino effect in the deep mining.
