爆破工程中EMD法识别精度的影响因素研究
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摘要
以八达岭长城站爆破工程为背景,利用Hilbert-Huang变换分析振动信号,对比分析EMD识别法识别不同影响区域下雷管实际延迟时间效果研究,影响EMD识别结果的影响因素。研究结果表明,在EMD法进行微差延迟时间识别时,无论振动信号是处于隧道近区或爆破远区都不能达到100%的识别率,且对于雷管的1段别的识别率较低;高频噪声是影响EMD识别法的识别精度的主要因素;分析0～125Hz频带的能量占比不同的数据,得出0～125Hz的能量占比越高,EMD法识别精度越高,即对信号消噪后再进行EMD法的识别会提高识别精度减少误差。
Taking the blasting project of Badaling Great Wall Station as the background,the HilbertHuang transform is used to analyze the vibration signal,and the influencing factors of the EMD recognition method affecting the actual delay time of the detonator in different affected areas are analyzed.The research results show that when the EMD method is used for differential delay time identification,the recognition rate of 100% cannot be achieved regardless of whether the vibration signal is in the tunnel nearby zone or the blasting far zone,and the recognition rate of the detonator is lower;frequency noise is the main factor affecting the recognition accuracy of EMD recognition method;analyzing the data with different energy ratios in the 0～125 Hz band,it is drawn that with higher the energy ratio of 0～125 Hz,the recognition accuracy of EMD will be higher,which means that after de-noising of signal,recognition of the EMD method can improve the recognition accuracy and lower error.The results have certain guiding significance for the actual project.
Taking the blasting project of Badaling Great Wall Station as the background,the HilbertHuang transform is used to analyze the vibration signal,and the influencing factors of the EMD recognition method affecting the actual delay time of the detonator in different affected areas are analyzed.The research results show that when the EMD method is used for differential delay time identification,the recognition rate of 100% cannot be achieved regardless of whether the vibration signal is in the tunnel nearby zone or the blasting far zone,and the recognition rate of the detonator is lower;frequency noise is the main factor affecting the recognition accuracy of EMD recognition method;analyzing the data with different energy ratios in the 0～125 Hz band,it is drawn that with higher the energy ratio of 0～125 Hz,the recognition accuracy of EMD will be higher,which means that after de-noising of signal,recognition of the EMD method can improve the recognition accuracy and lower error.The results have certain guiding significance for the actual project.
引文
[1]陈士海,燕永峰,戚桂峰,张现坤.微差爆破降震效果影响因素分析[J].岩土力学,2011,32(10):3003-3008.
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[4]凌同华,李夕兵.用小波变换识别微差爆破中的实际延迟时间[J].湖南科技大学学报:自然科学版,2004,(2):21-23.
[5]张胜,凌同华,刘浩然,曹峰.模式自适应小波时能密度法及其在微差爆破振动信号分析中的应用[J].煤炭学报,2014,39(10):2007-2013.
[6]张义平,李夕兵,赵国彦.爆破微差延时的EMD识别法[J].地下空间与工程学报,2006,(3):488-490.
[7]钱守一,李启月.微差爆破实际延迟时间的HHT瞬时能量识别法[J].矿业研究与开发,2012,32(2):113-116.
[8]史秀志,邱贤阳,周健,陈新,范玉乾,卢二伟.基于HHT的延期时间识别法在精确短延时爆破优化中的应用[J].Transactions of Nonferrous Metals Society of China,2016,26(7):1965-1974.
[9]龚敏,邱燚可可,孟祥栋,李永强,曾恭剑,唐胜.基于HHT的雷管实际延时识别法在城市环境微差爆破中的应用[J].振动与冲击,2015,34(10):206-212.
[10]张在晨,林从谋,黄志波,葛冰洋,徐亮.隧道爆破近区振动的预测方法[J].爆炸与冲击,2014,34(3):367-372.
[11]杨年华,爆破振动理论与测控技术[M].北京:中国铁道出版社,2014:48.
[2]毛静民.延迟间隔对微差爆破震动效应的影响[J].爆破,1997,(2):81-84.
[3]凌同华,李夕兵.基于小波变换的时-能分布确定微差爆破的实际延迟时间[J].岩石力学与工程学报,2004,(13):2266-2270.
[4]凌同华,李夕兵.用小波变换识别微差爆破中的实际延迟时间[J].湖南科技大学学报:自然科学版,2004,(2):21-23.
[5]张胜,凌同华,刘浩然,曹峰.模式自适应小波时能密度法及其在微差爆破振动信号分析中的应用[J].煤炭学报,2014,39(10):2007-2013.
[6]张义平,李夕兵,赵国彦.爆破微差延时的EMD识别法[J].地下空间与工程学报,2006,(3):488-490.
[7]钱守一,李启月.微差爆破实际延迟时间的HHT瞬时能量识别法[J].矿业研究与开发,2012,32(2):113-116.
[8]史秀志,邱贤阳,周健,陈新,范玉乾,卢二伟.基于HHT的延期时间识别法在精确短延时爆破优化中的应用[J].Transactions of Nonferrous Metals Society of China,2016,26(7):1965-1974.
[9]龚敏,邱燚可可,孟祥栋,李永强,曾恭剑,唐胜.基于HHT的雷管实际延时识别法在城市环境微差爆破中的应用[J].振动与冲击,2015,34(10):206-212.
[10]张在晨,林从谋,黄志波,葛冰洋,徐亮.隧道爆破近区振动的预测方法[J].爆炸与冲击,2014,34(3):367-372.
[11]杨年华,爆破振动理论与测控技术[M].北京:中国铁道出版社,2014:48.