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High Resolution Shallow Seismic Reflection Survey for the Investigation of Ground Disturbance Area  

Ko, Kwang-Beom (한성대학교 영상화기술 연구실)
Lee, Doo-Sung (한성대학교 소프트웨어 시스템 공학)
Publication Information
Geophysics and Geophysical Exploration / v.6, no.1, 2003 , pp. 28-34 More about this Journal
Abstract
A problem of ground subsidence has been a focus of our research over the past 3 years. The purpose of this study is to investigate the disturbed stratigraphic structure by mining and to separate the possible ground subsidence area using shallow seismic reflection survey and processing. To overcome the problems such as the distortion and attenuation of seismic signal caused by ground disturbance and to acquire the high frequency data, an array with short spacing (0.3m) for both the shot and receivers, yielding near-offset (<30m) and CMP spacing of 0.15m was implemented. Data were acquired along the survey line with length of about 43m by fixed receiver array. By considering statics caused by the ground disturbance and offset distribution of data, careful processing steps such as muting and residual statics correction were applied for successful shallow reflection imaging. By correlating the ground subsidence data and stack section, possible subsidence zone could be interpreted quantitatively.
Keywords
ground subsidence; ground disturbance; seismic reflection survey; residual static correction;
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