Method and device for waterborne seismic exploration

Abstract

The invention discloses an over-water walking voyage type seismic exploration method and an over-water walking voyage type seismic exploration device. According to the method and the device, wave detectors (21) are arranged in wave detector towfishes (22); a plurality of wave detector towfishes (22) are connected together by using cables so as to form a wave detector towfish string (2); the seismic wave is triggered by using a mechanical seismic source (8) arranged inside an electric mechanical seismic source towfish (1); the electric mechanical seismic source towfish (1) can automatically lift and release the cable of the wave detector towfish string (2); the wave detector towfish string (2) and the electric mechanical seismic source towfish (1) move against the waterflow under the dragging of a mechanical tugboat (4); and the seismic wave detection is carried out through a seismograph (7) arranged on the mechanical tugboat (4). By utilizing the method and the device, the matching degree, the stability and the reliability of seismic signals in the exploration working are ensured, and moreover the method and the device are flexible in working mode, light in equipment and high in working efficiency, the noise interference of wave and moving waterflow is eliminated, and the seismic signal resolution is high.

Description

technical field [0001] The invention relates to a water-based navigation seismic exploration method and device widely used in engineering seismic exploration in water conservancy and hydropower projects, waterway engineering, marine engineering and other industries, which belongs to the technical field of engineering geological detection, and particularly relates to a method and device for seismic exploration in rivers and lakes. And in the process of seismic exploration at sea, a method and a device are adopted in which a geophone is built into one or more geophone buoys with hydroacoustic amplification effect and floating on the water surface, and the seismometer on the tugboat is used for detection. Background technique [0002] Engineering seismic exploration is a young subject of exploration geophysics. It is based on the physical characteristics of seismic waves propagating in the medium to study the relationship between seismic parameters of underground rock mass or fo...

AI Technical Summary

Problems solved by technology

However, placing the geophone at the bottom of the water is a lot of work, labor-intensive, and there are safety hazards, high cost of consumables, and low work efficiency.

However, because the piezoelectric floating cable uses an audio frequency receiving signal, the matching effect between this signal and the seismograph is poor, and the seismic source uses an electric spark, which has a high frequency, fast attenuation, is greatly affected by the sound of water flow, and is expensive.

Therefore, this method of using underwater geophones or floating cables with piezoelectric geophones for detection is not ideal.

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