基于HHT的高陡边坡爆破振动规律研究

Study on blasting vibration law of high and steep slope based on HHT method

为研究爆破振动信号在高陡边坡传播规律,以某露天矿高陡岩质边坡为工程背景,提出了测点布置原则,并基于HHT方法研究了IMF分量、Hilbert瞬时能量谱、能量谱及边际谱。结果表明:测振仪传感器禁止安装在褶皱及断裂带上,各测振仪监测点的岩性基本一致;爆破振动以低频为主,能量分布范围为0~100 Hz,且大部分能量集中于50 Hz以下的低频段区。

To study the propagation law of blasting vibration signals in a high and steep slope, this article takes a high and steep rock slope of an open-pit mine as the engineering background, proposes the arrangement principle of measuring points, and studies IMF component, Hilbert instantaneous energy spectrum, energy spectrum and marginal spectrum based on HHT method. The results show that the vibrograph is not installed on the fold and fault zone, and the lithology of each vibrograph is the same. The blasting vibration is mainly low frequency, and the energy distribution range is 0 Hz to 100 Hz, and most of the energy is concentrated in the low-frequency region below 50 Hz.