Characteristics Research Of Micro-seismic Activity On Filling body Collapsing For A Lead-zinc Mine

By researching waveform characteristics and spatiotemporal law of micro-seismic activity before filling body was collapsing, it found that the event magnitude was less than -2, dominant frequency was about 300Hz, time delay of waveform was less than 0.1s, and also found that there were 48 hours incubationSperiod and 84 hours growth period, it provided references to ground pressure risk assessment and warningSsigns for filling roof.