Proper determination of drilling parameters plays a key role in applying big diameter drilling to prevent rockburst. The pressure relief evaluation index of burst risk area in coal face is studied based on rock mechanics testing, theoretical analysis and site measurement. The concept of energy dissipation index is presented, and the conversion formulation of energy dissipation index and bursting energy index is derived. Some conclusions are drawn as follows: good correlation is found between energy dissipation index and bursting energy index, which can be used as the index to evaluate the seam residual rockburst hazard of pressure relief. The “regionalization and grading” prevention and treatment ideas of rockburst risk area in coal face is proposed, with effective pressure relief strain rates of 1.5‰, 1.0‰ and 0.8‰ for the pressure relief indices of high, middle and general risk areas, respectively, in Xinjulong Mine. The quantitative calculation method of rockburst prevention relief drilling parameters is derived based on energy dissipation index. The ideas are applied to working face 2302S of Xinjulong Mine with a good result, providing a reference for rockburst control.