刘桂勇;刘小鸣;陈士海;
LIU Gui-yong;LIU Xiao-ming;CHEN Shi-hai;Chongqing Municipal Public Security Bureau;College of Civil Engineering, Huaqiao University;Fujian Research Center for Tunneling and Urban Underground Space Engineering;

• 1:重庆市公安局
• 2:华侨大学土木工程学院
• 3:福建省隧道与城市地下空间与工程技术研究中心

摘要(Abstract)：

为了得到非电雷管和电子雷管的合理延时时间进而控制地表振速，以厦门抽水蓄能电站的进场通风兼安全洞的延时爆破为背景，通过现场实测数据和理论公式分析了不同延时时间对地表振动叠加效应的影响。根据实测数据，分析了隧道掘进中毫秒延时爆破和半秒延时爆破地表振动波形的叠加效应，可知非电雷管的误差导致毫秒延时爆破中不同段的地表振动波形形成叠加；而半秒雷管虽有误差，但延时时间较大，不同段的振速波形之间相互独立。利用理论计算探讨了本工程中第1段掏槽孔和第2段掏槽孔在不同延时时间下的振动波形叠加情况，给出了叠加振速放大、叠加振速减小和无叠加产生的几种情况。依据理论和实测振速波形的叠加效应，分别提出适合本工程的毫秒延时非电雷管和电子雷管的合理延时时间，可为类似的隧道延时爆破提供借鉴。
In order to obtain the reasonable delay times of the non-electric detonator and electronic detonator so as to control the surface vibration speed, taking the approach and ventilation hole of Xiamen Pumped Storage Power Station as the bac-kground, the effects of different delay times on the superposition of surface vibration waveforms were analyzed by using the field measured data and theoretical formulas. According to the measured data, the superposition effects of millisecond delay blasting and half-second delay blasting in tunnel excavation are analyzed. The error of non-electric detonator results in the superposition of surface vibration waveforms in different sections of millisecond delay blasting. Although the half-second detonator also has errors, the interval time is relatively large, and the vibration velocity waveforms of different sections are independent of each other. The superposition of vibration waveforms of the cut holes in the first and second sections in this project at different intervals is discussed by theoretical calculation, and the cases of vibration speed amplification by superposition, vibration speed reduction by superposition and no superposition are given. According to the superposition effect of theoretical and measured vibration velocity waveforms, the reasonable interval time of millisecond-delayed non-electric detonators and electronic detonators suitable for this project are respectively proposed, which can provide reference for similar tunnel delayed blasting.

关键词(KeyWords)： 爆破振动;延时爆破;延时时间;叠加效应
blasting vibration;delayed blasting;delay time;superposition effect

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 刘桂勇;刘小鸣;陈士海;
LIU Gui-yong;LIU Xiao-ming;CHEN Shi-hai;Chongqing Municipal Public Security Bureau;College of Civil Engineering, Huaqiao University;Fujian Research Center for Tunneling and Urban Underground Space Engineering;

DOI: 10.19931/j.EB.20210351

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