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

Abstract

The invention relates to a strong single frequency and random noise suppression method and system for mining seismic signals. The method comprises the following steps of first suppressing the strong single-frequency noise of a reference track; reducing the single-frequency noise energy of all the gathers by a method based on cross-correlation theory; and finally suppressing the random noise and the residual single-frequency noise by an adaptive threshold method in the time-frequency domain to obtain a high signal-to-noise ratio correlation record with mining earthquakes. The strong single frequency and random noise suppression method and system have less influence by human intervention and less calculation cost compared with the method of identifying frequency coordinates of the single-frequency noise based on experience or manually due to the implementation of automatic identification of the frequency coordinates corresponding to the strong single frequency, have higher operation efficiency than that of the channel-by-channel suppression noise by adopting the method based on the cross correlation theory to suppress the strong single-frequency energy of all the gathers at one time,and provide the basic data of higher quality for later imaging process and improve the imaging accuracy through the obtain cross-correlation mining seismic record of high signal-to-noise ratio.

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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