基于CEEMD-MPE-NHT的地下洞室爆破网路延时分析  

Delay Time Analysis of Blasting Network in Underground Cavern based on CEEMD-MPE-NHT

作　　者：孙苗 李兴明 吴立[2] SUN Miao;LI Xing-ming;WU Li(College of Environment and Engineering,Hubei Land Resources Vocational College,Wuhan 430090,China;Faculty of Engineering,China University of Geoscieneces,Wuhan 430074,China)

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

出　　处：《爆破》2022年第2期42-47,共6页Blasting

基　　金：国家自然科学基金(41672260)。

摘　　要：爆破网路延时识别易受EMD模态混淆的影响,得到混有虚假分量的IMF。而Hilbert变换受Bedrosian定理的约束在处理此类分量会产生负值瞬时频率,造成巨大的识别误差。为解决传统HHT在爆破网路延时分析时遇到的问题,提出了CEEMD-MPE-NHT爆破网路延时分析算法。该算法通过改进EMD得到补充集合经验模态分解-多尺度排列熵(CEEMD-MPE)算法,实现EMD模态混淆抑制。再对CEEMD-MPE得到IMF进行归一化Hilbert变换,解除Bedrosian定理对Hilbert变换的约束。对蕴含能量最大的IMF分量进行包络求解,包络峰值对应的时间间隔即为爆破网路实际延时。最后通过分析实际延时和理论延时之间的差值,可判断雷管是否处于正常服役状态。进一步通过干扰降震法得到本工程最合理爆破网路延时为54.51~59.75 ms,研究结果表明:基于CEEMD-MPE-NHT的爆破网路延时分析对爆破安全控制具有重要的现实意义。The delay time identification of blasting network is easily affected by the mode confusion of EMD,and the IMF with false components is obtained.However,the Hilbert transform is constrained by the Bedrosian theorem.When dealing with such components,it will produce negative instantaneous frequency,resulting in huge identification error.CEEMD-MPE-NHT blasting network delay time analysis algorithm was proposed to solve the problems of traditional HHT blasting network delay time analysis.In this algorithm,EMD mode confusion suppression is achieved by improving EMD and obtaining the complementary set empirical mode factory-Multiscale Permutation entropy(CEEMD-MPE)algorithm.The IMF obtained by CEEMD-MPE is transformed by normalized Hilbert transform to remove the constraint of Bedrosian theorem on Hilbert transform.The envelope of the IMF component with the largest energy content is solved,and the time interval corresponding to the envelope peak value is the actual delay time of the blasting network.By analyzing the difference between the actual delay time and the theoretical delay time,it can be judged whether the detonator is in normal service condition.Further,through the interference reduction method,the most reasonable delay time of the project is 54.51~59.75ms.The research results show that the blasting network delay time analysis based on CEEMD-MPE-NHT has important practical significance for blasting safety control.

关 键 词：爆破网路 补充集合经验模态分解 多尺度排列熵 模态混淆 希尔伯特变换 

分 类 号：TD235.1[矿业工程—矿井建设]