基于数值模拟和频谱分析的孔间精确延时探究  

Research on Delay Time of Electronic Detonator Based on Numerical Simulation and Spectrum Analysis

作　　者：李祥龙[1,2] 杨长辉 王建国 侯猛[3] 程明 LI Xianglong;YANG Changhui;WANG Jianguo;HOU Meng;CHENG Ming(Faculty of Land Resources Engineer,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space,Kunming 650093,China;Zhejiang Gaoneng Blasting Engineering Co.,Ltd.,Hangzhou 310000,China;Kunming Institute of Coal Science,Kunming 650000,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室,昆明650093 [3]浙江省高能爆破工程有限公司,杭州310000 [4]昆明煤炭科学研究所,昆明650000

出　　处：《有色金属工程》2022年第2期99-105,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51934003,52064025);昆明理工大学校级人培项目(KKZ3202021065)。

摘　　要：为研究不同延期时间对井下浅孔爆破的影响,利用数值模拟软件LS-DYNA对精确延时逐孔起爆的地下浅孔爆破作业方式进行研究。基于国内外的研究现状,浅孔爆破作业选用15、20、25、30、35 ms五种不同延期时间的连续不耦合装药逐孔起爆。进行现场精细延时逐孔起爆试验,通过爆破振动测试仪采集爆破振动速度,并对速度波形图进行探究分析,当孔间延时为25 ms时,其最大振速比15 ms时降低了27%、比20 ms时降低了8%、比30 ms时降低了29%、比35 ms时降低了52%。研究表明:延期时间为25 ms时降振最为明显。合理的延期时间能够有效降低爆破振动强度,保障周边构建物安全。In order to study the influence of different delay times on underground shallow hole blasting,numerical simulation software LS-DYNA was used to study the operation mode of underground shallow hole blasting with precise delay and hole-by-hole initiation.Based on the research status at home and abroad,five kinds of continuous uncoupled charged with different delay times of 15,20,25,30 and 35 ms were used for shallow-hole blasting.The field fine delay by hole initiation test was carried out.The blasting vibration velocity was collected by blasting vibration tester,and the velocity waveform was explored and analyzed.It was found that the vibration velocity peak at 25 ms with delay time decreased by 27%,8%,29%and 52%respectively,compared with the peak velocity at 15,20,30 and 35 ms.The research shows that the delay time is 25 ms,and the vibration reduction is the most pronounced.Reasonable delay time can effectively reduce the blasting vibration intensity and ensure the safety of surrounding rock masses.

关 键 词：延期时间 数值模拟 频谱分析 爆破振动 EMD-HHT 峰值速度 能量分析 

分 类 号：TD235.32[矿业工程—矿井建设]