Research On Microseism Occurrence Law About Fully-Mechanized Caving Coal Face At Deep Mining In Dongtan Mine

Mine earthquake, a dynamite Phenomenon of rock-mass unstable breakagesuddenly which is induced by mining. With the increased depth of mining, the trend thatthe quantity of the mine earthquake will appear the further rising, it will be one of themost serious disasters in coal mine. Once it occurrence maybe influence productionassignment, even result in property loss and personnel’s casualty. So, it is significant toresearch prevention and control measures of mine earthquake deeply.The paper adopt micro-seismic monitoring method to study the mine earthquakegenerating mechanism of1305fully-mechanized working face of Dongtan coal mine inthe mining period. First of all, analysis the data of monitoring to guarantee thereliability of SOS MS monitoring system and the rationality of monitoring point. Thenanalysis the regularity of micro-seismic activity events of1305working face, researchshows that the low energy micro-seismic events obvious linear relationship between themining speed, but the high energy micro-seismic events were not that; energy changecycle of micro-seismic events can determine the fracture distance of periodic weighting;the energy and frequency of micro-seismic events have certain correlation. Next,analysis the influence factors to seismic events such as fault and coal pillars, it provesthat stress concentration nearby the fault and coal pillars is the primary reason whichtrigger mine earthquake disasters. Secondly, from the evolution regular of micro-seismicevents space know the dominant factor of mine earthquake is key stratum movement andfracture failure. Finally, division the mine earthquake dangerous area of other miningarea after analyzing the mine earthquake generating mechanism and influence factors of1305fully-mechanized working face of Dongtan coal mine to ensure the work safety.The research in this paper can be seen that micro-seismic monitoring method is feasible formine earthquake monitoring and control, through micro-seismic monitoring find the cause ofdisaster mechanism and regular of mine earthquake for the prevention and control of the mineearthquake laid a foundation work.