【摘要】 以抚顺老虎台煤矿和甘肃华亭煤田为工程背景,基于长时间和高精度矿震观测与采矿作业数据分析,从采掘活动与发生矿震的定量关系,探索采掘扰动对岩体动力响应的调制作用。根据24 h的时间秩序中矿震活动与采矿作业关系的规律,区分出采矿直接相关型和间接相关型矿震。发现连续采动对矿震活动具有累积效应,由此可评价卸压解危的效果和范围,并可据此合理调整作业流程,降低矿震活动水平。发现减扰降震效果与开采深度成反比,深部采掘扰动岩体动力响应具有延迟衰减效应。在华亭煤矿特定采矿技术条件下,相隔210 m采空工作面的2个工作面,相向采、掘时采煤工作面对掘进工作面岩体动力响应的最大影响距离为450 m,相背采、掘时的最大影响距离可达750 m,推测较大的影响距离与厚层坚硬基本顶和留设的20 m宽煤柱有关。更多还原

【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.更多还原