Abstract: In view of the thick coal seam mining and oblique fault rock burst prevention and control problem, using theoretical analysis, numerical simulation, micro-seismic monitoring and other means, we have studied the impact mechanism of the working face in the advancing process from lower plate of normal fault to the upper plate, draw the conclusion: the distance from the fault is decreased from 180 m to 80 m in the process, the peak value of abutment pressure increases. The vertical displacement of coal wall increases, and the peak bearing pressure at 40 m away from the fault reached the maximum value, while the peak bearing pressure at 20 m appeared low value; there are two main impact controlling factors in the process of working face getting closer to normal fault, in other words, unloading causes the release of high static load stress near the fault plane and the strong dynamic load of violent overburden movement under fault cutting, moreover, the micro-seismic energy release of the former is far lower than that of the latter, and the distance from the fault is about 130 m, which is the critical position for the transformation of the two; on the basis of microseismic energy frequency and the drilling test, we reveal strong impact fault zones of the danger, and timely supplement relief program. we carried out blasting unloading for high stress concentrated fault plane and triangular fault coal pillar, and took the measures such as strengthening support and reducing propulsion speed to avoid the occurrence of impact disasters.