矿震P波到时拾取优化与降低震源定位误差应用研究

胡静云; 李庶林

doi:10.11779/CJGE201410023

矿震P波到时拾取优化与降低震源定位误差应用研究 English Version

胡静云¹,
李庶林^2,

1. 长沙矿山研究院有限责任公司国家金属采矿工程技术研究中心,湖南长沙 410012;#br#2. 厦门大学建筑与土木工程学院,福建厦门 361005

基金项目: 国家科技部科研院所技术开发研究专项资金项目（2013EG215024）; 国家科技支撑计划课题（2013BAB02B06）

详细信息

作者简介:
胡静云(1985-),男,工程师,硕士,主要从事岩石力学声发射与微震监测等方面的研究。E-mail: hujingyun007@163.com。

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- 文章访问数: 329
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出版历程
- 收稿日期: 2013-12-01
- 发布日期: 2014-10-19

Optimization of picking mine microseismic P-wave arrival time and its application in reducing error of source locating

HU Jing-yun¹,
LI Shu-lin^2,

1. Changsha Institute of Mining Research, Changsha 410012, China;#br#2. School of Architectural and Civil Engineering, Xiamen University, Xiamen 361005, China

摘要

摘要: 多通道微震监测系统采用的定位算法一般是基于P波到时与等速度模型,P波到时拾取的准确与否直接影响着定位精度的高低。然而由于地震波传播衰减与应用环境背景噪声的原因,参与定位的一些通道信噪比偏低,P波到时拾取的随意性较大,导致震源定位结果与实际震源位置相差较大,影响了在矿山的实际应用效果。简要介绍了震源定位方法并开发应用了基于小波理论的离散信号滤噪程序,通过对原始信号进行小波分解、给定阀值与重构处理后,提高了原始信号的信噪比,显著地提高了P波到时拾取准确度。结合某矿山特大采空区采场冒顶实例,应用基于小波理论的信号滤噪方法对信噪比偏低的通道进行了滤噪处理,重新优化拾取了P波到时。所得到的定位结果,与处理前相比,定位误差从47~94 m减小到14~23 m,大大提高了微震监测在矿山的实际应用效果。方法1的P波到时/ms 方法2的P波到时#br#/ms 方法1 方法2
- 矿震 /
- 微震监测 /
- P波到时 /
- 小波滤噪 /
- 定位误差
Abstract: The locating algorithm of multi-channel microseismic monitoring system is generally based on the P-wave arrival time and equal velocity model. The P-wave arrival time directly influences the precision of positioning. However, due to the attenuation of earthquake wave propagation and background noise, some channels are involved in positioning with low SNR, and random picking of P-wave arrival time may lead to great positioning error and affect the actual application effect in mines. The source location method and application of the noise signal filtering procedure based on wavelet theory are introduced. According to the wavelet decomposition, given threshold and reconstruction of signal, the SNR of the original signals is enhanced, and the picking accuracy of the P-wave arrival time is significantly improved. Taking some roof collapse examples in a mine with outsize goaf, re-optimization of picking the P-wave arrivals time in low SNR channels improves the precision of positioning results from 47 ~ 94 m to 14 ~ 23 m, and the actual application effect in mines is greatly improved.
- mine microseism /
- microseismic monitoring /
- P-wave arrival time /
- wavelet de-noising /
- locating error

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参考文献(19)

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矿震P波到时拾取优化与降低震源定位误差应用研究 English Version

作者简介: 胡静云(1985-),男,工程师,硕士,主要从事岩石力学声发射与微震监测等方面的研究。E-mail: hujingyun007@163.com。

计量

出版历程

Optimization of picking mine microseismic P-wave arrival time and its application in reducing error of source locating

计量

出版历程

目录

作者简介:
胡静云(1985-),男,工程师,硕士,主要从事岩石力学声发射与微震监测等方面的研究。E-mail: hujingyun007@163.com。