In order to ensure the roller bit to work always in the status of effective volu metric fragmentation of rock during raise borer is drilling pilot hole,some rese arch was done.Based on Matlab-based software,a great number of operational data of deep raise borers while drilling pilot holes with different diameters was ana lyzed and fitted,and the mathematical models of axial pressure,operating torque,drilling speed,the driving depth of the roller bit and Protodyakonov coefficient of rock strength were educed while the raise borer works in the best state.The results of research provide theoretical basis for the design of full-automatic p ilot-hole drilling system of advanced large-scale deep raise borer.