为更准确地反映爆破塌落振动危害特性,从能量传递方面入手,利用HHT分析方法,得到爆破塌落振动在不同距离、不同方向上的振动危害特性.结果表明:爆破塌落振动频率较低,绝大部分为1～10Hz,其中垂向分量携带80％以上能量,径向振动能量随距离的增大而向低频集中,切向振动能量更集中在低频部分；垂向振动能量在频率上的分布随距离变化无明显变换规律可循,塌落振动最大瞬时输入能量不超过总能量的30％,通常为10％～20％,与振动幅值大小有一定的相关性,但不是一一对应.基于所得结果,可将塌落振动30％E作为最大瞬时输入能量来计算爆破塌落振动危害指标.%In order to reflect the harm characteristic of collapsing vibration by blasting more accurately, the HHT method was used to analyze it from energy transmission, and it was obtained in different distances and directions. The results were as follows: the vibration frequencies were low and most of them were between 1 and lOHz, the radial vibration energy tended to low frequency with increasing distance, the tangential vibration energy was mostly concentrated on low frequency, the law of vertical vibration energy distribution was obscure in frequency with distance change, the maximum instantaneous input energy of collapse vibration was lower than 30 percent of the total input energy and was usually between 10 and 20 percent, it was related to vibration amplitude but was not one-to-one correspondence. Based on the results, 30%E was equal to the maximum instantaneous input energy, and it could be used to calculate harm indicators of collapsing vibration by blasting.
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