关键词: 顶板冒落, 微震监测, 事件率, 事件簇群

Abstract: Luohe Iron Mine adopts the panel stage open stope and subsequent filling mining method， which retains a large number of panel interval pillars. At the same time，in the mining and filling cycle of a single ore block，the exposed area of the roof of the goaf in one step is large and the exposure time is long， and the stress of the overlying strata is transferred and redistributed in the filling cycle. In order to ensure the safety of dynamic mining，a high-precision microseismic monitoring system is established. From the pa⁃ rameters of event occurrence time，event rate，microseismic moment magnitude，b value change，event cluster and so on，the roof caving of a goaf in Luohe iron mine is inversely analyzed. The results show that the microseismic monitoring system can monitor the dynamic change process of rock mass fracture and send out early warning information 3~7 days in advance，which can help the safety supervision of mines.

Key words: roof caving, microseismic monitoring, event rate, event cluster