声发射技术在地压监测中的应用
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摘要
对某矿的采空区围岩试样进行了单轴压缩声发射实验,得到了岩石破坏时能率、事件率等声发射参数值,根据这些数值对声发射监测系统参数进行了设置;通过对声发射监测系统长期运行结果的统计,总结出了井下多种活动即岩石声发射、打钻、爆破、人工破碎大块矿石、放矿、敲击的波形及各类波形的参数范围;确定了以能率、事件率为特征的采空区失稳判据,为判断地压灾害提供了可靠依据。
Through uniaxial compression acoustic emission experiments to goaf surrounding rock sample of a Mine,acoustic emission parameter values such as energy rate and event rate were obtained when rock failure.According to these values,parameters of acoustic emission monitoring system were set.Through statistics for long-term operation result of the acoustic emission monitoring system,waveforms of various underground activities namely rock acoustic emission,drilling,blasting,artificial crushing of large ore,ore drawing and percussion and parameter range of all kinds of the waveforms were summarized.Instability criterion of the goaf with characteristics of the energy rate and event rate were determined,so as to provide a reliable basis for judgment of underground pressure disaster.
Through uniaxial compression acoustic emission experiments to goaf surrounding rock sample of a Mine,acoustic emission parameter values such as energy rate and event rate were obtained when rock failure.According to these values,parameters of acoustic emission monitoring system were set.Through statistics for long-term operation result of the acoustic emission monitoring system,waveforms of various underground activities namely rock acoustic emission,drilling,blasting,artificial crushing of large ore,ore drawing and percussion and parameter range of all kinds of the waveforms were summarized.Instability criterion of the goaf with characteristics of the energy rate and event rate were determined,so as to provide a reliable basis for judgment of underground pressure disaster.
引文
[1]何春林,崔栋梁.多通道声发射监测系统在井下采空区稳定性监测中的应用[J].有色金属:矿山部分,2008,60(1):34-37.
[2]刘国清.基于声发射的岩体工程灾害微震监测系统[J].采矿技术,2005,5(1):30,38.
[3]张省军,刘建坡,石长岩,等.基于声发射实验岩石破坏前兆特征研究[J].金属矿山,2008,38(8):65-68.
[4]季明,高峰,徐小丽,等.单轴压缩下的岩石声发射及其分维特征[J].金属矿山,2008,38(11):133-136.
[5]李志雄,马胜利,李圣强,等.基于岩石变形声发射实验结果讨论岩石失稳的可预测性[J].山西地震,2006(1):11-15.
[6]文兴,李宏建.采空区地压灾害监测技术研究[J].现代矿业,2010,26(11):107-109.
[7]余克圣,唐绍辉,吴迪文.岩体工程灾害微震监测系统的新进展[J].矿业研究与开发,1999,19(2):40-42,50.
[8]李小军,路广奇,李化敏.基于声发射事件b值变化规律的岩石破坏前兆识别及其局限性[J].河南理工大学学报:自然科学版,2010,29(5):663-666.
[2]刘国清.基于声发射的岩体工程灾害微震监测系统[J].采矿技术,2005,5(1):30,38.
[3]张省军,刘建坡,石长岩,等.基于声发射实验岩石破坏前兆特征研究[J].金属矿山,2008,38(8):65-68.
[4]季明,高峰,徐小丽,等.单轴压缩下的岩石声发射及其分维特征[J].金属矿山,2008,38(11):133-136.
[5]李志雄,马胜利,李圣强,等.基于岩石变形声发射实验结果讨论岩石失稳的可预测性[J].山西地震,2006(1):11-15.
[6]文兴,李宏建.采空区地压灾害监测技术研究[J].现代矿业,2010,26(11):107-109.
[7]余克圣,唐绍辉,吴迪文.岩体工程灾害微震监测系统的新进展[J].矿业研究与开发,1999,19(2):40-42,50.
[8]李小军,路广奇,李化敏.基于声发射事件b值变化规律的岩石破坏前兆识别及其局限性[J].河南理工大学学报:自然科学版,2010,29(5):663-666.
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