Relationship between mining and mining-induced seismicity

Abstract：With the engineering background of Fushun Laohutai Coal Mine and Gansu Huating Coal Field,the quantitative relationship between mining activities and rock-burst was studied to research the influence on the dynamic response of rocks by mining disturbance based on the high-precision mine seismic monitoring over the long time and analysis of mine operation data.According to the relation between the mining-induced seismicity activities in 24 hours and mining work regularity,the mining-induced seismicities that are directly and indirectly correlated to mining activities were distinguished.It is found that the continuous mining has a cumulative effect to mining-induced seismicity,which can be used to evaluate the effect and the range of relieving stress,and adjust operation procedure reasonably to reduce rock-burst activities level.It is considered that the effect of reduce rock-burst activities level has the inverse ratio with mining depth,the dynamic response of rocks has delay-attenuation effect in deep mining.In the condition of Huating Coal Mine,the two working faces are separated by a 210 m goaf,the maximum affect distance of the dynamic response of rocks is 450 m in case of the opposite mining between mining and heading faces,and that is 750 m in case of back-to-back mining,which can be speculated that the biggish affect distance is connected with the thick-bedded and rigid basic roof and coal pillar of 20 m.