Abstract: Shitai Mine III1 mining area, large coal seam dip angle, serious igneous rock erosion at coal seam roof, broken rock, brings great difficulties to the coal mining. On the basis of analyzing the reasons of failure mining at III313 working face, equipment selection of III315 working face adopts ZZQ7600/21/45 inclined strut shield type support, and the performance-parameters of shearer, scraper machine are improved. The practice shows that the effect is good.