Show simple item record

dc.contributor.author胡静云
dc.contributor.author李庶林
dc.date.accessioned2016-05-17T03:04:19Z
dc.date.available2016-05-17T03:04:19Z
dc.date.issued2014-6-27
dc.identifier.citation岩土工程学报,2014,(10):186-192
dc.identifier.issn1000-4548
dc.identifier.otherYTGC201410029
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/108735
dc.description.abstract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。
dc.description.abstractThe 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.
dc.description.sponsorship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)
dc.language.isozh_CN
dc.subject矿震
dc.subject微震监测
dc.subjectP波到时
dc.subject小波滤噪
dc.subject定位误差
dc.subjectmine microseism
dc.subjectmicroseismic monitoring
dc.subjectP-wave arrival time
dc.subjectwavelet de-noising
dc.subjectlocating error
dc.title矿震P波到时拾取优化与降低震源定位误差应用研究
dc.title.alternativeOptimization of picking mine microseismic P-wave arrival time and its application in reducing error of source locating
dc.typeArticle


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record