东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (9): 1332-1336.DOI: 10.12068/j.issn.1005-3026.2018.09.023

• 资源与土木工程 • 上一篇    下一篇

基于小波变换的自适应阈值微震信号去噪研究

程浩, 袁月, 王恩德, 付建飞   

  1. (东北大学 深部金属矿山开采教育部重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2017-06-20 修回日期:2017-06-20 出版日期:2018-09-15 发布日期:2018-09-12
  • 通讯作者: 程浩
  • 作者简介:程 浩(1988-),男,辽宁沈阳人,东北大学师资博士后; 王恩德(1957-),男,辽宁盖州人,东北大学教授,博士生导师.冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目(N160103001); 国家重点基础研究发展计划项目(2016YFC0801603).国家自然科学基金资助项目(51171041).

Study of Hierarchical Adaptive Threshold Micro-seismic Signal Denoising Based on Wavelet Transform

CHENG Hao, YUAN Yue, WANG En-de, FU Jian-fei   

  1. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China.
  • Received:2017-06-20 Revised:2017-06-20 Online:2018-09-15 Published:2018-09-12
  • Contact: CHENG Hao
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摘要: 针对矿山微震信号中所包含的随机噪声对微震监测和微震源的准确定位存在着严重干扰的问题,根据前人的研究成果,在分层阈值上增加分层自适应因子,提出一种新的分层自适应阈值方法.该方法根据矿山微震有效信号的低频特性,利用分层自适应因子,将高频部分的噪声信号最大限度地去除,提高矿山微震信号的信噪比;同时,最大程度地保留低频部分的信号.通过实际数据与分层阈值的对比,验证了该方法的有效性与优越性.

关键词: 矿山微震信号, 小波变换, 去噪方法, 自适应阈值, 信噪比

Abstract: Random noise contained in the mine micro-seismic signal has serious interference to the micro-seismic monitoring and the accurate positioning of the micro-seismic source. According to the previous research and the actual application effects, the paper proposed a new denoising method with the hierarchical adaptive threshold based on the characteristics of mine micro-seismic signals. It adds the layered adaptive factors to the hierarchical threshold. According to the low frequency characteristic of the mine micro-seismic effective signal, the noise signal of the high frequency part is removed greatly by using the layered adaptive factor to improve the signal to noise ratio of the mine micro-seismic signal. And the signal of the low frequency part is maximally kept. The validity and superiority of the method are illustrated by comparing the hierarchical threshold with the real-field micro-seismic data.

Key words: mine micro-seismic signal, wavelet transform, denoising method, adaptive threshold, signal to noise ratio

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