On-water seismic reflection data acquisition method of floating cable type hydrophone

Abstract

The invention relates to an on-water seismic reflection data acquisition method based on an artificial hammer seismic source and a floating cable, and belongs to the technical field of water-power engineering exploration. Under the condition that the target exploration depth is ensured, the hammer is adopted to knock an aluminum alloy plate to generate seismic waves instead of an explosive seismic source, an encountering time distance curve observation system is adopted, a river-spanning section is arranged on a river surface, and ends of the section on the banks of a river are respectively knocked, so that a floating cable type hydrophone used in offshore object exploration is innovatively used in rivers to receive seismic signals for a first time, field data can be acquired, the problems that the ecological environment can be damaged and polluted by the explosive seismic source, and the method is environmental friendly. The method provided by the invention is already successfully used in water-power engineering in China and other countries, is good in effect and high in practicability and has wide market prospect and high popularization values in water-power on-water exploration as the data acquisition and working mode of conventional on-water seismic reflection exploration is changed and the exploration requirements of ordinary shallow seismic engineering are met.

Description

technical field [0001] The invention belongs to the technical field of hydropower engineering survey, specifically belongs to the field of seismic survey of geophysical survey in the technical field of engineering survey, and in particular relates to a method for collecting seismic refraction data on water based on floating cable hydrophones. Background technique [0002] The survey of each stage in the early stage of hydropower is mainly to select a suitable dam site, investigate the geological conditions of the reservoir area, etc., to find out the thickness of the covering layer, the thickness of the weathered layer and the thickness of the impact layer in each area during the engineering exploration, and to understand the velocity of the underlying bedrock longitudinal wave and The distribution range of the low-speed zone. In water conservancy and hydropower geophysical prospecting, water seismic refraction prospecting is the most common geophysical prospecting method. ...

AI Technical Summary

Problems solved by technology

On the one hand, water seismic refraction exploration tends to be carried out in relatively narrow, turbulent rivers, and most of the river sections that do not have navigable conditions; on the other hand, the purchase, transportation, storage, use and destruction of pyrotechnic materials have become extremely difficult. Even some construction sites cannot obtain pyrotechnic materials at all

This has brought great difficulties to the traditional marine seismic exploration work, and it is even impossible to carry out. Therefore, it is necessary to combine the offshore geophysical prospecting method to find a green, high-efficiency, low-cost, safe and reliable marine seismic refraction that replaces the explosive source with a non-explosive source. Data collection method

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