Abstract: By analysis broken characters and influence elements of rock burst in roadway floor，prevention technology that include sectional blasting in deep hole and bolt-grouting of floor rock burst was put forward on the basis of release and supporting coupling theory.Detailed numerical model was conducted with FLAC^3D to evaluate the characters of surrounding rock stress distributions and deformation in different supporting methods，which include non supporting in floor，bolt-grouting in floor，sectional blasting in deep hole and bolt-grouting in floor.The feasibility of floor rock burst prevention technology was validated by filed test.The results showed that the prevention technology could decreased energy accumulation in shallow position of floor，which induced by high stress，floor heave and two sides convergence could be controlled effectively，and then rock burst in floor would be prevented.