Based on 7623 filling working face broken roof, serious partial side fall roof caving, difficult filling stoping problems, Xingtai Mine started the combined support of bolt and grouting technology research, established paste grouting anchor combined support similar physical model, the system of electrohydraulic servo rock mechanics experiment and conducting two-dimensional static compression experiment, analyzed its mechanical parameters. Field application showed that the combined bolt and grouting increased the roof of the plasticity and toughness, enhanced the integrity of the roof, and effectively prevented the side fall roof caving, and implemented the effective filing under broken roof caving, which provided a new method for working face going though fault roof control.