Strong single-frequency and random noise suppression method and system for seismic signals while mining

Abstract

The invention relates to a method and system for suppressing strong single-frequency and random noises for simultaneous sampling of seismic signals. The invention first suppresses the strong single-frequency noise of the reference channel; then adopts the method based on the cross-correlation theory to reduce the single-frequency noise energy of all the gathers; finally suppresses the random noise and the residual single-frequency noise through the adaptive threshold method in the time-frequency domain, Obtain seismic cross-correlation records with high signal-to-noise ratio while mining. The invention realizes the automatic identification of the frequency coordinates corresponding to the strong single frequency. Compared with the method of identifying the frequency coordinates of the single frequency noise based on experience or manually, the influence of human intervention is smaller and the calculation cost is saved; the method based on the cross-correlation theory is adopted in the present invention. The strong single-frequency energy of all gathers is suppressed at one time, which is more efficient than the method of suppressing noise track by track; the cross-correlation with high signal-to-noise ratio obtained through the acquisition of seismic records will provide a higher level of imaging processing later. Quality basic data to improve imaging accuracy.

Description

technical field [0001] The invention relates to a method and system for suppressing noise of seismic signals while mining, belonging to the technical field of seismic exploration, in particular to a method and system for suppressing strong single-frequency and random noise for seismic signals while mining. Background technique [0002] While mining seismic exploration technology, in the process of seismic exploration on the working face, the energy of the coal and rock mass cut by the shearer is used as the seismic source to replace the explosive seismic source, and the seismic exploration is carried out synchronously with the operation of the shearer. This technological innovation can not only solve various safety hazards caused by explosive excitation, but also achieve the purpose of real-time detection of catastrophic geological bodies such as instantaneous ground stress changes and fault activation induced by mining of coal and rock mass, without interfering with the norm...

AI Technical Summary

Problems solved by technology

In general, there is strong single-frequency noise interference in the seismic environment of random mining. When this processing method is used, the time-frequency coefficients of the signal and noise are basically the same, so the ideal denoising effect cannot be achieved.

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