The application of deep seismic reflection methods to the detection of deep geological structures beneath karst areas

Abstract：Surface karst features in Panjiang-Guizhong depression make up a good example for applying the data acquisition technique in the karst area to studying deep structures beneath the depression. To probe into some problems related to complex karst features in the Panjiang-Guizhong depression, such techniques as high-resolution multiple-means survey, analysis and suppression of interference waves, objective-facing design for the observational system, and selection of shot and geophone position seem to be the key methods. The authors conducted many experiments to choose congruent explosive and record parameters. The noise analysis and elimination and many kinds of static correction means make up the crux of the technologies. The reflection image of the profile has good signal-to-noise ratio as well as high quality of profile and single-shot data. Based on these techniques, this paper has discussed some deep structures beneath the depression as a real example of karst features.