In order to solve the surrounding rock damage problems of winch chamber in No.Ⅲ1 Mining Area of Yangzhuang Mine, such as, two sides getting closer, severe skin falling off the roof of pulp and serious floor heave, through the laboratory test, theoretical analysis and FLAC3D numerical analysis, the failure mechanism of the surrounding rock is studied.The results show that weak surrounding rock layers, a lot of clay mineral components and unreasonable supporting structure and parameters were the immediate causes for the failure, the excavation of old roadway around the winch chamber was the indirect cause, which provided scientific theory basis for the repair of the winch chamber and can be applied to the repair of similar mine chamber damage.
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