基于EP-CEEMDAN-PED的隧道扩挖爆破网络延时分析  

Network Delay Analysis in Tunnel Expansion Blasting Based on EP-CEEMDAN-PED

作　　者：孙苗 李兴明 吴立[2] SUN Miao;LI Xingming;WU Li(College of environment and Engineering,Hubei Land Resources Vocational College,Hubei Wuhan 30090;Faculty of Engineering,China University of Geosciences,Wuhan,Hubei Wuhan 30074)

机构地区：[1]湖北国土资源职业学院环境与工程学院,湖北武汉430090 [2]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《爆破器材》2022年第4期51-57,共7页Explosive Materials

基　　金：国家自然科学基金(41672260)。

摘　　要：经验模态分解(empirical mode decomposition,EMD)固有的端点效应和模态混淆导致其在进行爆破网络延时分析时出现不容忽视的误差。为了获得爆破现场实际网络延时,判断批次雷管的安全性,必须对EMD进行改进。通过对爆破地震波监测信号进行端点处理(endpoint processing,EP),改善EMD在处理信号实际端点时出现的端点突变现象,进而抑制EMD端点效应,提高固有模态函数(intrinsic mode function,IMF)的稳定性和精度。对EMD进行改进,得到自适应补充集合经验模态分解(complete ensemble empirical mode decomposition with adaptive noise,CEEMDAN),抑制低频趋势项模态混淆,并结合排列熵检测(permutation entropy detection,PED)来控制高频模态混淆。得到的EP-CEEMDAN-PED算法能识别微差爆破实际延期时间,且能有效克服EMD固有的端点效应和模态混淆现象,结合干扰减振法,可计算实际隧道扩挖爆破合理减振微差时间为55.14~57.93 ms,对爆破振动控制具有重要的现实意义。The inherent endpoint effect and modal confusion of empirical mode decomposition(EMD) lead to errors that can not be ignored in the analysis of blasting network delay. In order to obtain the actual network delay at the blasting site and judge the safety of batch detonators, EMD must be improved. Through endpoint processing(EP) of blasting seismic wave monitoring signal, the endpoint mutation phenomenon of EMD when processing the actual endpoint of signal was improved, so as to suppress the endpoint effect of EMD and improve the stability and accuracy of intrinsic mode function(IMF). The EMD was improved to obtain the complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN) to suppress the modal confusion of low-frequency trend term, and combined with permutation entropy detection(PED) to control the high-frequency modal confusion. The obtained EP-CEEMDAN-PED algorithm can identify the actual delay time of millisecond blasting, and can effectively overcome the inherent endpoint effect and modal confusion of EMD. Combined with the interference damping method, the reasonable damping millisecond time of actual tunnel expansion blasting can be calculated as 55.14-57.93 ms, which is of great practical significance for blasting vibration control.

关 键 词：爆破地震波信号 微差起爆 经验模态分解 固有模态函数 

分 类 号：TD235.1[矿业工程—矿井建设] O382[理学—流体力学]