沿海滩涂区浅层地震不同类型激发震源适用性分析

doi:10.11720/wtyht.2021.1091

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Abstract

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.

Key words： coastal tidal flats geological survey hammering source tamping source drop-hammer source sparker source

Received: 26 February 2020 Published: 29 April 2021

ZTFLH:

P631.4

Corresponding Authors: YUE Hang-Yu E-mail: zbaowei@mail.cgs.gov.cn;yhangyu@mail.cgs.gov.cn

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	Bao-Wei ZHANG
	Hang-Yu YUE
	Kai WANG
	Xiao-Jiang WANG

Cite this article:

Bao-Wei ZHANG,Hang-Yu YUE,Kai WANG, et al. Applicability analysis on different types of sources for shallow seismic detection in coastal tidal flats[J]. Geophysical and Geochemical Exploration, 2021, 45(2): 403-412.

URL:

https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1091 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I2/403

Location of coastal tidal flat in the experimental area

Seismic record comparison stimulated by tamping source(a) and hammering source(b)

Seismic record comparison stimulated by hammering source(a) and drop-hammer source(b)

Seismic record comparison stimulated by drop-hammer source(a) and sparker source(b) in reclamation area of tidal flats

Seismic record comparison stimulated by drop-hammer source(a) and sparker source(b) under weak wind

Seismic record comparison stimulated by drop-hammer source(a) and sparker source(b) under moderate wind

Seismic record comparison stimulated by drop-hammer source(a) and sparker source(b) under strong wind

Seismic record comparison stimulated by drop-hammer source(a) and sparker source(b) in mud area of tidal flats

Spectral analysis of seismic records stimulated by drop-hammer source(a) and sparker source(b)

Reflection seismic section stimulated by drop-hammer source(a) and sparker source(b)

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