SS-Y型伸缩仪环境干扰的异常研究

张娜; 龚燕民

doi:10.19987/j.dzkxjz.2021-068

SS-Y型伸缩仪环境干扰的异常研究

doi: 10.19987/j.dzkxjz.2021-068

张娜^1, ,,
龚燕民²

1.
保定地震监测中心站，河北保定 071051
2.
易县地震台，河北易县 071000

基金项目: 中国地震局三结合项目（3JH-2021008）资助。

详细信息

通讯作者:
张娜（1984-），女，高级工程师，主要从事数字形变学科分析与研究工作。E-mail：zhangnayaomu@163.com

中图分类号: P315.6
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- 文章访问数: 143
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出版历程
- 收稿日期: 2021-09-07
- 修回日期: 2021-09-27
- 网络出版日期: 2021-12-23

Research on environmental disturbance of SS-Y extensometer

Zhang Na^{1
, ,},
Gong Yanmin²

1.
Baoding Seismic Monitoring Center Station, Hebei Baoding 071051, China
2.
Yixian Seismic Station, Hebei Yixian 071000, China

摘要

摘要: 对易县地震台SS-Y型伸缩仪2014—2021年观测数据受环境干扰的5个典型事件进行异常分析，结合易县台形变山洞所处的构造应力背景场，并利用模型定量计算得出：①荷载干扰源对易县台伸缩仪观测数据造成的荷载应变量与干扰源的距离、荷载量有关并呈正相关；②易县台SS-Y型伸缩仪三分向中NS测项、NE测项受到荷载干扰曲线异常幅度大，曲线形态基本呈拉张状态；③干扰源的三维模型模拟定量计算结果小于异常变化应变量。
- 易县地震台 /
- SS-Y型伸缩仪 /
- 环境干扰
Abstract: Based on the observation data of SS-Y extensometer at Yixian Seismic Station from 2014 to 2021, five typical events disturbed by the environment are analyzed, combined with the tectonic stress background field of Yixian deformation cave and the quantitative calculation of the model. The following conclusions are obtained: ① The load strain caused by the load interference source on the observation data of the extensometer at Yixian Station is related to the distance and load of the interference source and is positively correlated; ② The SS-Y extensometer of Yixian Station is divided into three parts, where the NS test item and the NE test item are subjected to the abnormal amplitude of load disturbance curve. ③ The results of three-dimensional model simulation of interference sources are smaller than those of anomalous variables.
- Yixian Seismic Station /
- SS-Y extensometer /
- environmental disturbance

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图 1 伸缩仪周围环境干扰示意图

Figure 1. Schematic diagram of environmental disturbance around extensometer

下载: 全尺寸图片幻灯片

图 2 易县地震台伸缩仪、水管仪倾斜仪2017年4月20日—5月10日观测数据分钟值曲线

Figure 2. Minute value curve of extensometer and water pipe tiltmeter in Yixian Seismic Station on April 20 to May 10 in 2017

下载: 全尺寸图片幻灯片

图 3 易县地震台伸缩仪观测曲线对比图（11月1日—12月10日，2018和2019年）

Figure 3. Comparative of observation curve of Yixian Seismic Station extensometer (November 1 to December 10, in 2018 and 2019)

下载: 全尺寸图片幻灯片

图 4 易县台伸缩仪NE向2016—2018年观测分钟值曲线

Figure 4. Observed minute value curve of extensometer NE in Yixian Seismic Station from 2016 to 2018

下载: 全尺寸图片幻灯片

图 5 易县地震台洞体应变EW分量分钟值曲线

Figure 5. Minute value curves of hole strain EW component of Yixian Seismic Station

下载: 全尺寸图片幻灯片

图 6 易县台伸缩仪NE向2015年以来日值观测数据图

Figure 6. Observation data of extensometer NE in Yixian Seismic Station since 2015

下载: 全尺寸图片幻灯片

表 1 伸缩仪观测数据受荷载干扰的异常特征

Table 1. Abnormal characteristics of observed data of extensometer disturbed by load

序号	异常出现时间段	测项	异常形态	异常幅度 ×10⁻⁸	荷载干扰源	干扰源距山洞距离/km	干扰源在山洞的方位	三维模拟定量计算结果/伸缩仪异常变化幅度值
1	2017-04-30—05-06	伸缩仪NS 测向	拉张状态	37.1	1#采石场	1.86	东边	26/37
2	2019-11-26—12-10	伸缩仪NS 测向	拉张状态	304	2#采石场	2.00	北偏东	3/5
3	2017-01-01—2018-06-14	伸缩仪NE 测向	压缩状态	92.95	1#采石场	1.86	东边	3/10
4	2019-03-08—04-08	伸缩仪EW 测向	拉张状态	6.978	1#采石场	1.86	东边	1/2
5	2020-01—2021-05	伸缩仪NE 测向	拉张状态	421.89	房屋基建、挖土	0.18	西偏北	7/5

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