Abstract: Aiming at the characteristics of return airway of rock with broken roof in Zhuji Coal Mine, supporting method and supporting opportunity are analyzed with dynamic and step reinforcement principle. Based on the experiment, obtained the deformation features and cranny distributing characteristics of roadway surrounding rock, address such issues, rock was reinforced by using key position reinforced support and anchor cable grouting reinforcement. This technology achieved good results.

Key words: fragmentation zone, dynamic support, key parts, grouting reinforcement