【摘要】 遗留煤柱影响区域易形成应力叠加,煤柱下方工作面冲击危险性较无煤柱影响回采期间一般有所升高。基于SOS微震监测系统监测桃山煤矿工作面通过煤柱影响区域的微震活动,分析了微震空间分布规律,能量、频次变化规律以及震动信号频谱特征。研究结果表明:工作面过煤柱影响区域,震动能量、频次均有显著提高,强矿震发生在微震活动持续增强或急剧下降阶段;冲击矿压主震信号较前兆信号有主频低,振幅大,速度快,衰减慢等特征。研究成果为评价煤柱影响区域冲击矿压危险性提供依据,具有一定的理论意义与实用价值。更多还原

【Abstract】 The stress superposition would be occurred in the area affected by the left coal pillars.The coal mining face under the left coal pillars would have a more possibility to have the mine pressure bumping danger occurred than the pillarless mining area.Base on the micro seismic activities in the coal pillar influence area of the coal mining face in the Taoshan Mine monitored and measured with the SOS seismic monitoring and measuring system,the paper analyzed the micro seismic space distribution law,energy quantity,frequency variation law was well as the seismic signal spectrum features.The study results showed that(1) when the coal mining face passed through the coal pillar influence area,the seismic energy and frequency all would be obviously increased and after the high mine seismic occurred,the micro seismic activities would be continued or could be at the serious reduced stage,(2) in comparison with the forewarning signals,the main seismic signal of the mine pressure bumping would have the low main frequency,high amplitude,fast speed,attenuation slow and other features.The study achievements would be the references to the evaluation of the mine pressure bumping danger in the coal pillar influence area and would have the certain theoretical meaning and practical value.更多还原