Abstract: RFPA^2D is used to carry out numerical experimental study on three-body model rock burst tendency including hard roof and hard coal seam and hard floor. The study results showed that hard roof combination became suddenly instability after peak, which is prone to rock burst; hard coal seam combination stores a large number of elasticity and releases instantaneously before the peak, it is easy to happen rock burst; the curve of hard floor combination shows a ladder-like slow down trend after peak, that it is hard to appear rock burst. Acoustic emission energy release of combination is divided into three stages: energy instantaneous concentration release of hard roof combination and hard coal seam combination energy, slow release of hard floor combination energy. Though the total energy release of hard floor combination is greater than that of hard roof combination, but it is different in energy release mechanism.