Abstract: In this paper, to solve the field inspection difficulties for outburst prediction indicators in rock cross-cut coal uncovering, on the basis of similarity theory and the mechanics condition of outburst, the similar conditions of outburst simulation test in laboratory was analyzed by using dimensional analysis method, and the testing equipment for outburst simulation were designed. By applying similar ground stress and gas pressure on the equipment, the outburst simulation test was conducted. Moreover, all the outburst prediction indexes for rock cross-cut coal uncovering were tested under the same condition, and the accuracy of each prediction index was studied. The study in this paper produces conditions for the laboratory examination of outburs prediction indexes in both rock cross-cut and shaft coal uncovering．

Key words: outburst simulation, mechanics condition, similarity, test