基于地震仪与四分量钻孔应变仪共点观测Rayleigh波频散特性

doi:10.12196/j.issn.1000-3274.2023.04.002

地震 ›› 2023, Vol. 43 ›› Issue (4): 21-36.doi: 10.12196/j.issn.1000-3274.2023.04.002

基于地震仪与四分量钻孔应变仪共点观测Rayleigh波频散特性

王晓蕾, 薛兵, 崔仁胜, 朱小毅, 高尚华, 赵帅博, 张兵

中国地震局地震预测研究所, 北京 100036

收稿日期:2022-08-15 修回日期:2023-05-31 出版日期:2023-10-31 发布日期:2023-12-29
通讯作者: 朱小毅, 研究员。 E-mail: zxy@ief.ac.cn
作者简介:王晓蕾(1985-), 女, 河北宁晋人, 副研究员, 主要从事主动震源数据和深井地球物理观测数据处理及应用研究。
基金资助:
中央级公益性科研院所基本科研业务费专项(CEAIEF2022030106, CEAIEF20230402, CEAIEF20220
502); 国家重点研发计划项目(2018YFC1503905-5)

Rayleigh Wave Dispersion Characteristics Based on the Observations from Seismometer and Collocated Four-Gauge Borehole Strainmeter

WANG Xiao-lei, XUE Bing, CUI Ren-sheng, ZHU Xiao-yi, GAO Shang-hua, ZHAO Shuai-bo, ZHANG Bing

Institude of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China

Received:2022-08-15 Revised:2023-05-31 Online:2023-10-31 Published:2023-12-29

摘要/Abstract

摘要： 作为中国地震科学实验场建设的重要部分之一, 深井地震综合观测系统建设项目在安宁河—则木河断裂带附近建成了一个深井地震观测实验系统, 共建成10个井深300 m和2个井深1000 m综合地震观测井, 其中包含了地震波观测和应变观测, 通过将甚宽频带地震仪观测与四分量钻孔应变仪集成, 形成地震与应变共点观测。应变仪与地震仪的采样率均设计为100 Hz, 有利于获得高质量的远震、区域地震和近场微震的地震波和应变地震波观测数据。基于最早建成的地震综合观测深井之一拖乌300 m深井数据, 尝试采用地震波和应变地震波的振幅信息, 基于共点相速度估计理论, 获取了20~125 s周期范围内观测井局部的Rayleigh波相速度频散曲线。

关键词: 深井地震综合观测, 高分辨应变地震波观测, 共点相速度估计, Rayleigh波相速度频散曲线

Abstract: As one of the important parts of the construction of the China Seismic Experimental Site, the borehole seismic observation system construction project has built an observation array of borehole near the Anninghe-Zemuhe fault, consisted of 10 borehole with a depth of 300 meters and 3 borehole with a depth of 1000 meters. By integrating the broadband seismometer and the Four-Gauge Borehole Strainmeter (FGBS), the co-point observation of seismic and strain is formed. The sampling rate of both FGBS and seismometers is 100 Hz, which is conducive to obtain high-quality seismic and strain seismic wave data of teleseism, regional earthquakes, and near-field microseisms. In this paper, based on the data of 300-meter borehole Tuowu, one of the earliest comprehensive seismic observation boreholes, we try to use the amplitude information of seismic waves and strain seismic waves, combining the theory of single-site estimation of phase velocity, to obtain the local Rayleigh wave phase velocity dispersion curve in the period of 20~125 s.

Key words: Borehole seismic comprehensive observation, High resolution strain seismic wave observation, Single-site phase velocity estimation, Phase velocity dispersion curve of Rayleigh wave

中图分类号:

P315.7

王晓蕾, 薛兵, 崔仁胜, 朱小毅, 高尚华, 赵帅博, 张兵. 基于地震仪与四分量钻孔应变仪共点观测Rayleigh波频散特性[J]. 地震, 2023, 43(4): 21-36.

WANG Xiao-lei, XUE Bing, CUI Ren-sheng, ZHU Xiao-yi, GAO Shang-hua, ZHAO Shuai-bo, ZHANG Bing. Rayleigh Wave Dispersion Characteristics Based on the Observations from Seismometer and Collocated Four-Gauge Borehole Strainmeter[J]. EARTHQUAKE, 2023, 43(4): 21-36.

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基于地震仪与四分量钻孔应变仪共点观测Rayleigh波频散特性

Rayleigh Wave Dispersion Characteristics Based on the Observations from Seismometer and Collocated Four-Gauge Borehole Strainmeter

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