基于HHT能量谱的高精度雷管短微差爆破降振效果分析

发布时间：2018-05-28 09:34

本文选题：爆炸力学 + 干扰降振　；参考：《爆炸与冲击》2017年01期

【摘要】：为揭示高精度雷管短微差爆破干扰降振机理,选取紫金山金铜矿露天爆破实测的单段波形信号,利用Matlab分析了不同微差间隔下两段叠加信号的时频特征;综合考虑爆破振动三要素并结合HHT(Hilbert-Huang transform)能量定义降能率,分析了段数、相邻振幅比和最大段药量位置对短微差爆破叠加信号降振效果的影响。根据研究成果,爆破设计时应避免出现前后段数药量差距过大,并尽量将较大药量的段数靠后起爆。研究表明:相同微差间隔下随着段数的增加,叠加信号降能率逐渐增大,当段数达到一定数量后增加分段数,微差爆破的降振效果并不明显;微差爆破中相邻振幅比越接近1,降振效果越明显;最大段药量靠后的叠加信号降能率大于其他顺序。
[Abstract]:In order to reveal the mechanism of interference and vibration reduction by short-millisecond blasting of high precision detonator, the time-frequency characteristics of two superposition signals at different millisecond intervals were analyzed by using Matlab, which were measured by open-air blasting in Zijinshan Gold and Copper Mine. Considering the three elements of blasting vibration and combining with the energy definition of HHT(Hilbert-Huang transform, the effects of segment number, ratio of adjacent amplitude and position of maximum charge on the effect of superposition signal of short millisecond blasting are analyzed. According to the research results, the difference between front and rear section number should be avoided in blasting design, and the section number of larger charge should be backward detonated as far as possible. The results show that the energy drop rate of superposition signal increases with the increase of the number of segments at the same interval. When the number of segments reaches a certain number increases the number of segments the vibration reduction effect of millisecond blasting is not obvious. In millisecond blasting, the closer the ratio of adjacent amplitudes to 1 is, the more obvious the effect of vibration reduction is, and the reduction rate of superimposed signals with the maximum charge quantity is higher than that of other sequences.
【作者单位】：中南大学资源与安全工程学院;
【基金】：国家自然科学基金项目(51104178) 中南大学教师研究基金项目(20140004040001);中南大学中央高校基本科研业务费专项基金项目(2016zzts094)
【分类号】：TD235

【相似文献】