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[1]许英霞,丁俊柯,马传璧,等.基于集合经验模态分解的河北唐山井同震响应特征[J].地球科学与环境学报,2024,46(02):252-268.[doi:10.19814/j.jese.2023.11002]
 XU Ying-xia,DING Jun-ke,MA Chuan-bi,et al.Co-seismic Response Characteristics of Water Level in Well Tangshan of Hebei, China Based on EEMD[J].Journal of Earth Sciences and Environment,2024,46(02):252-268.[doi:10.19814/j.jese.2023.11002]
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第46卷
期数:
2024年第02期
页码:
252-268
栏目:
应用地球物理
出版日期:
2024-04-10

文章信息/Info

Title:
Co-seismic Response Characteristics of Water Level in Well Tangshan of Hebei, China Based on EEMD
文章编号:
1672-6561(2024)02-0252-17
作者:
许英霞1丁俊柯2马传璧23郭建芳3尹宝军4曹 冲2左文喆5
(1. 山西工程技术学院 地球科学与工程系,山西 阳泉 045000; 2. 华北理工大学 应急管理与安全工程学院,河北 唐山 063210; 3. 河北省地震局 唐山地震监测中心站,河北 唐山 063003; 4. 唐山市应急管理局,河北 唐山 063099; 5. 华北理工大学 矿业工程学院,河北 唐山 063210)
Author(s):
XU Ying-xia1 DING Jun-ke2 MA Chuan-bi23GUO Jian-fang3 YIN Bao-jun4 CAO Chong2 ZUO Wen-zhe5
(1. Department of Earth Science and Engineering, Shanxi Institute of Technology, Yangquan 045000,Shanxi, China; 2. School of Emergency Management and Safety Engineering, North China University of Science and Technology,Tangshan 063210, Hebei, China; 3. Tangshan SeismicMonitoring CenterStation, Hebei EarthquakeAgency, Tangshan 063003, Hebei, China; 4. Tangshan EmergencyManagement,Tangshan 063099, Hebei, China; 5. College of Mining Engineering, North China University of Science and Technology,Tangshan 063210, Hebei, China)
关键词:
同震响应 唐山井 集合经验模态分解 观测数据秒值 固有频率 地震方位 裂隙走向 地震能量密度
Keywords:
co-seismic response well Tangshan EEMD second valueof observation data natural frequency seismic orientation fracture orientation seismic energy density
分类号:
P315
DOI:
10.19814/j.jese.2023.11002
文献标志码:
A
摘要:
集合经验模态分解(EEMD)能够客观真实地从非线性、非平稳信号中提取有用信息,地震观测井的井水位表征的波形信号也是典型的非线性、非平稳信号,因此,集合经验模态分解在获取井水位同震响应信息方面具有重要的应用潜力。通过观测河北唐山井2016~2023年多次井水位同震响应,研究集合经验模态分解对井水位分析处理的优缺点,识别唐山井对远震、近震的井水位同震响应特征,应用地震能量密度经验公式推测唐山井记震能力。结果表明:唐山井水位观测数据秒值在经过集合经验模态分解后,对合适的高频分量进行重构可以压制噪声干扰,有利于观察井水位同震响应特征; 对于远场大震引起的振荡型同震响应可以客观真实地进行识别和提取; 对于近场地震引起的脉冲型和阶变型同震响应,需结合原始数据进行研究; 井水位观测数据秒值有利于揭示区域应力场的变化,因观测数据秒值记震精度提高,唐山井能够记录到地震能量密度为1.77×10-7 J?m-3的地震,观测井对不同方位地震的敏感度可用于研究其所在断裂带的裂隙走向。对于超过一定距离的远场地震,井-含水层系统能够记录到的井水位同震响应频率可在一定的范围内估算观测井的固有振动频率,唐山井固有振动频率和地震瑞丽面波频率接近。
Abstract:
Ensemble empirical mode decomposition(EEMD)can objectively and truly extract useful information from nonlinear and non-stationary signals, and the waveform signal characterized by water level in seismic observation well is also a typical nonlinear and non-stationary signal, so that EEMD has important application potential in obtaining the co-seismic response information ofwell water level. Taking well Tangshanin Hebei as an example, the advantages and disadvantages of EEMD for well water level analysis and processing through its co-seismic response of multiple well water levels from 2016 to 2023 were analyzed, the co-seismic response characteristics of well Tangshan were identified to teleseismic and near-seismic well water levels, and the seismic recording ability of well Tangshan was inferred by using the empirical formula of seismic energy density. The results show that after EEMD processing, the reconstruction of appropriate high-frequency components can suppress noise interference, which is more conducive to observing the co-seismic response characteristics of well water level. The oscillating co-seismic response caused by far-field large earthquakes can be identified and extracted objectively and truly. For the study of step-varying co-seismic response caused by near-field earthquakes, it is necessary to combine the original data to identify through high-frequency components. The second valueof well water levelobservation data is more conducive to revealing the change of regional stress field. Due to the improvement of the recording accuracy of second valueofobservation data, the earthquake with energy density of 1.77×10-7 J?m-3could be record by water level of well Tangshan. The sensitivity of observation wells to earthquakesin different orientations can be used to study the orientation ofthefracture in which they are located. For far-field earthquakes over a certain distance, the co-seismic response frequency ofwellwater level recorded by the well-aquifer system can calculate the natural vibration frequency of observation well within a certain range, and the natural vibration frequency of well Tangshan is close to the seismic Rayleigh wave.

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备注/Memo

备注/Memo:
收稿日期:2023-11-03; 修回日期:2024-02-22
基金项目:山西工程技术学院科研项目(2023QD-01); 国家自然科学基金项目(42002098)
作者简介:许英霞(1973-),女,河北石家庄人,副教授,理学博士,E-mail:xuyx516319@163.com。
更新日期/Last Update: 2024-04-10