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Mine micro-seismic signal P wave first arrival moment extraction method and system

An extraction method and signal technology, which are applied in seismic signal processing, seismology, measurement devices, etc., can solve the problem of inability to obtain the precise time of P waves, and achieve the effect of eliminating influence and solving serious errors.

Pending Publication Date: 2021-06-04
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, the present disclosure provides a high-precision method and system for extracting the first arrival time of the P wave of the mine microseismic signal, which solves the problem in the prior art that the precise time of the first arrival of the P wave cannot be obtained

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  • Mine micro-seismic signal P wave first arrival moment extraction method and system
  • Mine micro-seismic signal P wave first arrival moment extraction method and system
  • Mine micro-seismic signal P wave first arrival moment extraction method and system

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[0086] In order to better explain the present disclosure and facilitate understanding, the present disclosure will be described in detail below through specific implementation manners in conjunction with the accompanying drawings.

[0087] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms used herein in the description of the present disclosure are for the purpose of describing specific embodiments only, and are not intended to limit the present disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0088] Aiming at the deficiencies in the prior art, the present disclosure provides a method for extracting the first arrival time of the mine microseismic signal P wave, based on time-frequency-energy three-dimensional space analysis to improve the method of picking the first arrival time...

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Abstract

The invention discloses a mine micro-seismic signal P wave first arrival moment extraction method and system, and the method comprises the steps: obtaining a micro-seismic signal, and carrying out the dimension raising of the micro-seismic signal, and obtaining a time-frequency-energy distribution diagram of the micro-seismic signal; determining a main frequency band of the microseismic signal according to signal and noise energy distribution in the time-frequency-energy distribution diagram; determining a P-wave first arrival approximate moment on the main frequency band; and selecting a time window in the micro-seismic signal based on the P-wave first arrival approximate moment, and further determining a P-wave first arrival accurate moment. According to the method provided by the invention, the time domain and frequency domain information of the micro-seismic signal can be fully utilized, the real moment when the micro-seismic occurs can be found through energy analysis, the serious error generated by P-wave primary positioning is solved from the source, the more accurate P-wave first arrival is picked up, and the influence caused by abrupt change noise is eliminated.

Description

technical field [0001] The present disclosure relates to the technical field of microseismic monitoring, in particular to a method and system for extracting the first arrival time of P waves of mine microseismic signals. Background technique [0002] In the deep mining of underground mines, due to the harsh environment of "three highs and one disturbance" (high ground stress, high temperature, high osmotic pressure and strong mining disturbance), dynamic disasters such as surrounding rock deformation, rock collapse, and rockburst occur frequently. Seriously threaten the safety of mine underground workers. Ground pressure monitoring can monitor the internal stress changes of the rock formations in the mine in time, and plays an extremely important role in deep mining. The occurrence of mine dynamic disasters is accompanied by rock rupture, crack expansion and friction, and these processes will generate small-scale vibrations, which are called microseismic events. The micros...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/288G01V1/307Y02A90/30
Inventor 石雅倩张达冀虎戴锐吴彦博
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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