采用匹配定位方法，利用大岗山水库库区及附近（29.2°—29.9°N，101.9°—102.5°E）5次已知爆破事件对2014年3月1日至2015年12月31日内连续波形进行模板检测与定位，经过人工复核后共获取23次疑爆事件，这些事件与模板事件间有较高的相关性，相关系数达0.773 4，匹配后疑爆事件数为模板数的4.6倍，提高了对疑爆事件的识别率，同时剔除了原地震目录中人工误判的8次疑爆事件，有效地提高了地震编目质量。将匹配出来的疑爆事件及距离最近的台站记录到的NS向波形分别在Google Earth上投影，从影像图上可见扫描出的事件附近存在采石场或蓄水前修建大坝的场地，较符合爆破实际情况，重定位偏离量基本在0.5 km之内。研究认为，利用匹配定位的方法，能有效地区分不同类型的地震活动。
In this paper, we adopt a match and location (M&L) method to carry out events detection and location for the continuous waveforms in the area of Dagangshan (29.2°-29.9°N, 101.9°-102.5°E) from March 1, 2014 to December 31, 2015 by using 5 events listed in the network catalogue as templates. After the manual review, 23 suspicious blasting events were obtained, which were of high relevant with the templates, with the correlation coefficient up to 0.7734. The number of events after detected was 4.5 times of the templates, and 8 suspicious blasting events which were artificial misjudged in the original earthquake catalogue were also eliminated, and the quality of earthquake catalogue was improved as well as the identification rate of the event number. By projecting the matched suspicious blasting events and waveforms recorded in the nearest station in NS direction to the Google Earth, we could see that there are quarries or site built for the dame before impounding around the scanned events, which were consistent with the actual blasting conditions, and the relocation deviation was basically within 0.5 km. The study results illustrate that the match and locate (M&L) method can effectively distinguish different types of seismic activity.
2022,43(1): 42-50 收稿日期：2021-01-28
DOI：10.3969/j.issn.1003-3246.2022.01.007
基金项目：国家自然科学基金（项目编号：42074060）；四川省科技计划项目（立项编号：2020YJ0184）；国家自然科学基金（项目编号：U19A2098）
作者简介：杜瑶（1984—），女，工程师，主要从事水库地震监测与分析研究工作。E-mail：64953467@qq.com
参考文献：
包淑娴. 天然地震和人工爆破波形特征对比分析[J]. 华北地震科学,2011,29(1):15-19.
程万正. 高烈度区的水库地震问题[J]. 国际地震动态,2013,(4):10-18,9.
崔鑫,许力生,许忠淮,等. 小地震与人工爆破记录的时频分析[J]. 地震工程学报,2016,38(1):71-78.
阮祥,韩进,谢蓉华,等. 大岗山水库天然地震活动本底特征[J]. 地震,2017,37(3):157-168.
尹欣欣,李少华,陈文凯,等. 基于波形互相关的爆破震相识别研究[J]. 大地测量与地球动力学,2020,40(4):362-365.
曾宪伟,姚华建,莘海亮. 宁夏石嘴山震群的微震匹配定位及其发震构造[J]. 地震地质,2017,39(4):735-753.
张春贺,郑秀芬,许绍燮,等. 周期-频度谱在小爆破自动识别研究中的应用[J]. 地震地磁观测与研究,2006,27(5):24-28.
郑秀芬,傅瑀,许绍燮. 地震记录中小爆破的识别与判据研究[J]. 地震地磁观测与研究,2006,27(5):29-33.
《中国水力发电工程》编审委员会. 中国水力发电工程. 工程地质卷[M]. 北京:中国电力出版社,2000:74-75.
Wen L X. Localized temporal change of the Earth's inner core boundary[J]. Science, 2006, 314(5801):967-970.
Wen L X, Long H. High-precision location of North Korea's 2009 nuclear test[J]. Seismological Research Letters, 2010, 81(1):26-29.
Zhang M, Wen L X. High-precision location and yield of North Korea's 2013 nuclear test[J]. Geophysical Research Letters, 2013, 40(12):2 941-2 946.
Zhang M, Wen L X. An effective method for small event detection:Match and Locate (M&L)[J]. Geophysical Journal International, 2015, 200(3):1 523-1 537.
