微差爆破实际延迟时间的HHT瞬时能量识别法  

HHT Instantaneous Energy Method to Identify of Delay Time in Millisecond Blasting

作　　者：钱守一[1] 李启月[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《矿业研究与开发》2012年第2期113-116,共4页Mining Research and Development

摘　　要：在微差爆破工程中,由于普通雷管往往存在着延期误差,导致其实际延迟时间与设计延迟时间有较大出入,影响爆破效果。因此识别微差爆破的实际延迟时间,对雷管的设计研究和爆破参数的优化都有重要意义。采用全新的时频分析技术—HHT变换,利用得到的瞬时能量谱,分析某地下矿山的一微差爆破振动信号,成功识别出其实际延迟时间。与基于小波变换的时能密度法对同一信号分析结果的比较,验证了该方法的可行性。In millisecond blasting,because of delay error of delay detonator,the real delay time of initiation is different from the designed one,resulting in influence on the effect of blast.So it＇s significant to identify the real time of delay in millisecond blasting for the design of detonator and optimization of blasting parameters.By feat of the completely new time-frequency analysis technique HHT（Hilbert-Huang Transform）,the vibration signal of millisecond blasting in some underground mine was analyzed with the instantaneous energy spectrum obtained by HHT（Hilbert-Huang Transform）,which is a completely new time-frequency analysis technique.And the real delay time of initiation was identified successfully.By comparing the identified results with that obtained time-energy density analysis based on wavelet transform,the feasibility of the proposed HHT instantaneous energy method was verified.

关 键 词：微差爆破 HHT变换 瞬时能量 延迟时间 

分 类 号：TD253.14[矿业工程—矿井建设]