基于背景噪声研究东滩矿区地下介质波速变化特征  

Seismic Velocity Changes in Dongtan Mining Area Based on Ambient Noise

作　　者：戴宗辉 曲均浩[1] DAI Zonghui;QU Junhao(Shandong Earthquake Agency,20 East-Wenhua Road,Jinan 250014,China)

机构地区：[1]山东省地震局,济南市250014

出　　处：《大地测量与地球动力学》2025年第1期55-59,共5页Journal of Geodesy and Geodynamics

基　　金：山东省地震局科技创新团队培育专项(TD202301)。

摘　　要：基于地震背景噪声互相关方法,利用东滩煤矿CCH和BDS台2022-02-0802:00-2023-03-0807:00连续波形数据计算地下介质波速变化,并分析其与63上06工作面回采作业和矿震活动的相关性。研究结果表明,63上06工作面回采作业对地下介质波速影响明显;波速转折变化与矿震发生也具有较为明显的相关性,反映出地下应力水平变化与矿震发生的关系;矿震对地下应力的释放也可导致波速出现小幅度波动变化。Based on the seismic ambient noise cross-correlation method,we calculate the relative velocity variation within the underground medium.We utilize continuous waveform data from the CCH and BDS stations at Dongtan mine,spanning from 2 a.m.on February 8,2022,to 7 a.m.on March 8,2023.The analysis focuses on the correlation between these velocity changes and both the mining operation and seismic activity at the 63 up 06 working face.The findings reveal a notable impact of the mining operation at the 63 up 06 working face on the wave velocity within the underground medium.Additionally,a clear correlation exists between the changes in wave velocity and the incidence of mine earthquakes,highlighting the interplay between variations in underground stress levels and seismic events.Furthermore,the release of underground stress during mine earthquakes can lead to slight fluctuations in wave velocity.

关 键 词：背景噪声 波速变化 东滩煤矿 矿震 

分 类 号：P315[天文地球—地震学]