采用ＡＮＳＹＳ／ＬＳ－ＤＹＮＡ３Ｄ程序对岩体中双孔微差爆破近源场爆破振动进行了模拟．结果表明，随着离爆源距离的增加，质点振动波形的持续时间变长，同时二炮孔爆破振动波形中质点处于静止状态的间隔变小并产生叠加二因此通过数值模拟可确定微差爆破近区振动叠加起始位置． ANSYS / LS-DYNA3D program was used to simulate the near-field blasting vibration of two-hole differential blasting in rock mass. The results show that with the increase of the distance from the explosion source, the duration of the particle vibration waveform becomes longer. At the same time, the interval of the particles in the second blasting vibration waveform becomes smaller and the second one is superimposed. Therefore, the numerical simulation can be used to determine the microsecond blasting Near the initial area of ​​vibration superimposed position.