For transformation of shaft into raise, several technical issues remain unsolved, one of which is jamming. In Yongshaba Mine, many measures are adopted to address unsmoothed ore flow and raise jamming in trial operation of the high raise which used to be a shaft, with limited effectiveness. Proposals for technical renovation of the raise were suggested based on a comprehensive analysis of the field situation and according to the bulk flow rule and ore draw theory. Since the commission of the recommended optimal proposal, for about one month, continuous pilot running has drawn 30 kt ore , with good operational performance, indicating that the renovation is a great success.