北山地下实验室场址多尺度地壳形变观测系统的构建  

Construction of a Multi-Scale Crustal Deformation Observation System at the Beishan Underground Research Laboratory Site

作　　者：云龙 王驹[1,2] 田霄 占伟[3] 马庆尊 李亚伟[1,2] 罗辉[1,2] 张竞嘉[1,2] YUN Long;WANG Ju;TIAN Xiao;ZHAN Wei;MA Qingzun;LI Yawei;LUO Hui;ZHANG Jingjia(Beijing Research Institute of Uranium Geology,Beijing 100029,China;CAEA Innovation Center for Geological Disposal of High-Level Radioactive Waste,Beijing 100029,China;The First Monitoring and Application Center,CEA,Tianjin 300180,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]国家原子能机构高放废物地质处置创新中心,北京100029 [3]中国地震局第一监测中心,天津300180

出　　处：《世界核地质科学》2023年第S01期504-510,579,共8页World Nuclear Geoscience

基　　金：地下实验室场址深部地质环境研究项目(编号:FZ2101)资助。

摘　　要：在参考国外主要硬岩地下实验室场址地壳形变观测的经验,并结合我国高放废物北山地下实验室的定位和区域构造条件的基础上,构建了我国地下实验室场址多尺度地壳形变观测系统,该系统主要由跨断层、GNSS(Global Navigation Satellite System)和InSAR(Interferometric Synthetic Aperture Radar)形变观测3种手段组成,其中,利用跨断层和GNSS观测,给出地下实验室场址西侧关键构造(旧井断裂)的现今近场和远场的三维形变速率,评估断裂未来的活动趋势;GNSS观测以获得地下实验室场址所在新场岩体的水平形变特征;InSAR用以分析研究区最大LOS(Line of Sight)向的时序高分辨率形变速度场。以上3种手段的结合,初步实现了对地下实验室场址所在区域近场和远场范围多维度、多尺度的形变观测,观测对象囊括了场址区的主要断裂构造和大型岩体,该系统的建立填补了我国高放废物地下实验室场址形变观测的空白,为场址的适宜性评价奠定了良好的基础。Based on the experience gained from studying crustal deformation at major underground hard rock laboratory sites abroad,and considering the location and regional tectonic conditions of the Beishan underground research laboratory(URL)for high-level radioactive waste in China,a comprehensive multi-scale crustal deformation observation system has been developed at the laboratory site.This system comprises three main techniques:fault-crossing measurements,GNSS(Global Navigation Satellite System),and InSAR(Interferometric Synthetic Aperture Radar)deformation observations.The fault-crossing measurements and GNSS observations provide valuable insights into the three-dimensional deformation rates of the key structure(known as the Jiujing fault)located on the western side of the laboratory site.These observations enable the evaluation of the future activity trend of the fault.Additionally,GNSS observations allow for the determination of the horizontal deformation characteristics of the new rock mass within the laboratory site.Moreover,InSAR analysis is employed to investigate the temporal deformation velocity field along the maximum Line of Sight(LOS)direction in the study area.By integrating these three observation techniques,a preliminary understanding of multidimensional and multiscale deformation within both the near-field and far-field ranges of the laboratory site area has been achieved.The observed features encompass the major fault structures and large rock masses in the site vicinity.This newly established observation system effectively fills the existing research gap in deformation monitoring for the underground research laboratory site for geological disposal of high-level radioactive waste in China.Furthermore,it lays a solid foundation for the suitability assessment of the laboratory site.

关 键 词：高放废物地质处置 北山地下实验室 多尺度形变观测系统 跨断层形变观测 GNSS形变观测 InSAR形变观测 

分 类 号：P553[天文地球—构造地质学] TL942[天文地球—地质学]