受大理—临沧铁路建设影响，云县地震台迁建选址工作于2014年启动。文中就台址初勘、仪器勘选过程进行阐述，并对毛洞台基进行地噪声测试。分析认为，台站迁建选址科学合理，场址满足地震台站观测环境技术要求，但毛洞观测室受涌水及基岩墩表面破碎影响，地噪声水平在3 Hz频点略高，需对涌水采取封堵措施，并进一步清理基岩墩。迁建台站建成后，周边地区地震监测能力将得到有效提升。
Influenced by the construction of the Dali-Lincang Railway, Yunxian Seismic Station relocation and site selection was started in 2014. In this paper, the process of site survey and instrument survey is described; and the background noise of the observation cave is tested. The analysis shows that the relocation site of the station is scientific and reasonable and the site meets the technical requirements of the observation environment of a seismic station. However, the background noise of the observation cave is slightly higher at the frequency of 3 Hz due to the impact of water inrush and the surface fragmentation of the bedrock pier; so it is necessary to take measures of plugging for water inrush and further clean up the bedrock pier. After the construction of the relocated station, the seismic monitoring capability of the surrounding areas will be effectively improved.
2022,43（5）: 140-145 收稿日期：2021-04-06
DOI：10.3969/j.issn.1003-3246.2022.05.018
基金项目：中国地震局监测、预报、科研三结合课题（项目编号：3JH-202201010）
作者简介：曹白伦(1988-),男,云南临翔人,工程师,主要从事地形变、测震观测与分析工作。E-mail:514318602@qq.com
参考文献：
崔庆谷,杨玲英,蔡绍平,等. 系统动态特性对重力、地倾斜仪器抗干扰性能的影响[J]. 地震研究,2008,31(4):394-398.
贾华,秦波,起卫罗. 云南省地震台站观测环境保护典型案例及探讨[J]. 国际地震动态,2016,(5):25-28.
刘伟,舒鸿燚,吴国斌. 大临线主要工程地质问题及地质选线[J]. 铁道工程学报,2018,35(2):14-17.
秦嘉政,钱晓东,叶建庆. 云南地震监测台网进展与强震活动特征分析[J]. 地震研究,2012,35(4):441-448.
史凯,蔡艺,吴东,等. 南京市地震台站监测设施和观测环境保护的实践与探索[J]. 防灾减灾学报,2015,31(4):83-88.
王兰兰,张雪玲,何家斌,等. 地震观测环境对地震台地震记录的影响及对策[J]. 地震地磁观测与研究,2007,28(4):101-106.
曾启丰. 大理至临沧铁路选线设计[J]. 高速铁路技术,2017,8(6):89-92.
