According to the serious phenomenon of floor swelling during the coal mine burst in Huating coal field, measures which the transverse pressure relief (roadway cross-section) and the longitudinal pressure relief (along the roadway) were taken to eliminate the danger of rockburst. The static friction, which is caused by the horizontal stress in the borehole of roadway floor, would squeez the floor causing downward movement. The pressure of the floor was relieved through the fissure zone formed by the borehole blasting. A fracture zone in the tunnel was arranged at intervals, which played a role of " the spring body", to absorb the energy caused by the horizontal stress along the tunnel direction. The calculation results show that the energy absorption caused by the orientation controlling method was far greater than the energy level (10⁶ J) caused by mining shock hazard tested by the microseism monitoring system. Thus the orientation controlling method can have very good effects on avoiding the floor type rockburst phenomenon. Testing in a mine field, the implementation of the measures for a mine field was good and basically eliminated the phenomenon of tunnel floor swelling.