Method for picking up arrival time of slight shock waves

Abstract

The invention belongs to the field of micro-seismic monitoring, and discloses a micro-seismic vibration wave arrival time automatic pickup method which is mainly a comprehensive method combining a time window method and an AIC method, and the comprehensive method is named W-AIC. The automatic pickup system for the arrival time of the micro-seismic vibration waves is easy, convenient and accurate to use and suitable for micro-seismic positioning. According to the method, an acquired waveform file is transmitted into a computer through a micro-seismic data acquisition system, in order to effectively remove the influence of noise, improved FIR filtering is adopted for processing, first arrival picking of events is carried out on processed micro-seismic signals through a time window energy characteristic value method, and first arrival picking of the events is carried out through a time window energy characteristic value method; and when the data in the picked and divided range is accurately picked by using the improved W-AIC algorithm, peak value judgment is carried out, and a first arrival point is accurately obtained. According to the method, the accuracy and scientificity of automatic picking when the vibration waves arrive are improved, and the working efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of microseismic monitoring, in particular to a method for picking up the arrival time of microseismic shock waves. Background technique [0002] With the development of informatization, digitalization, and intelligence, microseismic monitoring technology is widely used in highway slopes, underground space, subway development, hydropower dams, high-rise buildings, rock bursts, mine water penetration, unconventional oil and gas fracturing, coal and gas The application in fields such as outburst and rock burst is more and more extensive. [0003] How to accurately pick up the microseismic signal and scientifically and accurately judge the arrival time of the signal, so as to improve the accuracy of source location and predict the accuracy of rock mass rupture has become an urgent problem to be solved. Since 2000, some domestic large-scale mines have introduced foreign microseismic monitoring products, and obtained many ...

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Problems solved by technology

Since 2000, some domestic large-scale mines have introduced foreign microseismic monitoring products, and obtained many research results in cooperation with relevant universities and scientific research institutions, making important contributions to the development of microseismic monitoring technology, but at the same time they are also facing product The problem of high cost and shortage of after-sales technical services. The time-to-time identification and picking technology in the existing microseismic monitoring system is still in the development stage. The obvious problems of time-to-time picking at this stage are low precision and complicated operation. The experience and analytical ability of personnel are highly required, and the accuracy, real-time and scientific nature of the microseismic monitoring system cannot be realized

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