Seismic source positioning method and system based on data field potential value and readable storage medium

Abstract

The invention discloses a seismic source positioning method and system based on a data field potential value, and a readable storage medium. The method comprises the steps: firstly carrying out the denoising of a micro-seismic signal; picking up P-wave first arrival by combining automation and manual work; sampling by adopting a Bootstrap method to obtain a plurality of P-wave first arrival sub-data sets; adopting a double-difference method and a data field potential value to obtain a micro-seismic event initial positioning result; calculating theoretical propagation time from a seismic sourceto a sensor by utilizing the initial positioning result, and removing P-wave first arrival large-error pickup signals; and removing the P-wave first arrival picked up by the large error as new data,and carrying out Bootstrap sampling and data field potential value positioning to obtain a final seismic source position. According to the method, high-frequency and power-frequency noise of the micro-seismic signals can be removed, the signal-to-noise ratio is improved, and P-wave first arrival picked up by the automatic method is more accurate; points with large positioning density are obtainedbased on the data field potential values, the influence of an initial iteration center can be reduced, and therefore the microseism positioning result is more stable.

Description

technical field [0001] The invention belongs to the field of microseismic monitoring, and in particular relates to a seismic source location method, system and readable storage medium based on data field potential values. Background technique [0002] Microseismic monitoring technology is a geophysical technology widely used in geotechnical engineering, especially mining engineering and tunnel engineering. It uses sensors to receive microseismic signals generated by fault slippage, and then analyzes the location, magnitude and energy changes of microseismic events. characteristics, so as to infer the mechanical state of the rock mass, and take effective prevention and control measures. Among them, microseismic positioning can determine the rupture position of the rock mass, which is the basis for subsequent magnitude calculation, focal mechanism inversion and risk analysis, so high-precision seismic source positioning is very important. [0003] At present, noise reduction ...

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Problems solved by technology

[0006] The present invention proposes a seismic source location method, system and readable storage medium based on data field potential values. The method is aimed at the instability of the existing P wave first arrival picking method, and proposes to combine automatic and manual picking of the P wave first arrival time. It can effectively improve the picking accuracy and ensure faster data processing speed

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