不同抽气深度对阿克苏断层氢观测的影响研究  

STUDY ON INFLUENCE OF DIFFERENT PUMPING DEPTHS ON FAULT HYDROGEN OBSERVATION IN AKSU

作　　者：刘海洋 蒋志英[1] 徐衍刚[1] 贾东辉 LIU Hai-yang;JIANG Zhi-ying;XU Yan-gang;JIA Dong-hui(Aksu Earthquake Monitoring Center Station,Earthquake Agency of Xinjiang Uygur Autonomous Region,Aksu 843000,Xinjiang,China;Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局阿克苏地震监测中心站,新疆阿克苏843000 [2]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2024年第4期387-393,共7页Inland Earthquake

基　　金：中国地震局监测、预报、科研三结合课题(3JH-202401055)。

摘　　要：通过在新疆阿克苏断层氢观测点5~105 cm深度进行的5个不同抽气深度实验可以看出,在断层氢观测中不同抽气深度的氢气背景值、日变幅、动态特征等均存在较大差异。由于氢气的扩散具有较强的穿透性和低粘滞性,造成氢气在观测孔内垂直向上具有明显的不均匀分带性;并且因为观测点所处的构造位置差异及气象因素的影响,造成氢气背景值及观测数据质量的差异。在阿克苏观测点的断层上盘80 cm抽气深度,断层氢数据均方差、变异系数等均明显优于其他深度,可以做为阿克苏断层氢观测的优选深度。Through five different pumping depth experiments at the depth of 5~105 cm at the Aksu fault hydrogen observation point in Xinjiang,it can be seen that there are great differences in the hy-drogen background value,daily amplitude and dynamic characteristics of different pumping depths in the fault hydrogen observation.Due to the strong penetrability and low viscosity of hydrogen diffu-sion,hydrogen has obvious uneven zonality in the vertical direction of the observation hole.And be-cause of the difference in the structural position of the observation point and the influence of meteoro-logical factors,the hydrogen background value and the quality of the observation data are different.The pumping depth of 80 cm in the hanging wall of the fault at Aksu observation point,the mean square error and coefficient of variation of fault hydrogen data are significantly better than other depths,which can be used as the preferred depth of Aksu fault hydrogen observation.

关 键 词：阿克苏 断层氢 抽气深度 实验研究 

分 类 号：P315.7[天文地球—地震学]