复杂环境中精确延时控制爆破的地震波能量分布  

Energy distribution of seismic waves from blasting with precise delay timing in complex environments

作　　者：徐振洋[1] 杨军[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《爆炸与冲击》2013年第S1期116-121,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51074028)

摘　　要：使用电子雷管精确延时起爆,可使爆破地震波能量主频避开建(构)筑物自振频率。使用HHT分析爆破振动信号能量分布规律,结果表明:精确延时起爆控制爆破可以达到很好的减震效果,爆破地震波能量主频带分布在10Hz以上;随着爆心距的增加,30Hz以下的低频带成为能量的集中部分;控制振动瞬时能量的大小,可以减少振动累积损伤。Electronic detonators were adopted to accomplish blasting with precise delay timing,in which the dominant frequency of the blasting seismic wave energy avoided the self-vibration frequency of the building.The energy distribution of the blasting seismic waves was analyzed by applying the Hilbert-Huang transform algorithm.The investigated results show that precise-delay blasting can achieve a good vibration reduction effect and the main vibration frequency of the blasting seismic wave energy lies in the frequency band of above 10Hz.And with the increasing of the distance from the blasting center,the blasting seismic wave energy is mainly distributed in the frequency band of below 30Hz.The accumulative damage by vibration can be reduced by controlling the instantaneous vibration energy.

关 键 词：爆炸力学 电子雷管 精确延时 HHT 减震 

分 类 号：TU751.9[建筑科学—建筑技术科学]