Hilbert-Huang transform analyzing on the response of seismic waves to the explosive performance

To test the quality (energy, frequency, frequency band width) of seismic wave, as well as explore the explosive source that can generate seismic waves with high energy and frequency, a field test in sandy soil was carried out using TNT, aluminum ladder (AL), 8701 and black powder (BP). Vibration signals of the ground surface at a distance from 10~65 m were recorded and analyzed by Hilbert-Huang transform (HHT). The results showed that the seismic wave generated by 8701 with high energy and detonation velocity owns large energy, but accompany with a narrow frequency band and low predominant frequency, and its energy in high frequency region get attenuation rapidly along with the propagation distance; BP with low power and low detonation velocity explosive generates a wide frequency band wave, however, it is short of energy. Then, high power and low detonation velocity explosive-TL stimulates seismic wave with large energy and wide frequency band, and its dominant frequency is between that of BP and 8701.