沿海滩涂区浅层地震不同类型激发震源适用性分析

受复杂地表地质条件影响,沿海滩涂区地质调查程度较低,限制了相关地质调查方法技术的发展水平.浅层地震勘探技术在沿海滩涂地质调查中作用显著,但其勘探设备在沿海滩涂的适用性问题制约了地震探测数据采集工作,尤其体现在激发震源的适用性问题上.文中针对沿海滩涂复杂的地表地质条件,在满足探测要求的前提下,以提高地震记录分辨率和信噪比...

Applicability analysis on different types of sources for shallow seismic detection in coastal tidal flats

Affected by the complex surface geological conditions,the degree of geological survey in coastal tidal-flat areas is quite low,which limits the development level of relevant geological survey methods.Shallow seismic exploration technology plays an important role in the geological survey of coastal shoals.However,seismic data acquisition in this area is restricted by the applicability of exploration equipment,especially the source.In order to meet the detection requirement in coastal tidal flats and consider the complex near surface conditions,the authors carried out an experimental study of applicability analysis of shallow seismic sources,which also took the resolution,SNR and work efficiency into consideration.Light and flexible sources were selected in this paper,orderly including the tamping source,hammering source,drop-hammer source and sparker source.A comparison between different sources shows that spark source gets the best performance in such aspects as reflection wave frequency,frequency band,continuity in seismic events,detecting depth,SNR and noise resistance,which can also improve the acquisition efficiency of shallow seismic detection.The application result shows that spark source has a good applicability in shallow seismic detection for coastal tidal flats.