云南开远井水温高频波动异常特征与机理讨论  

Discussion of the Feature and Mechanism of the High-frequency Fluctuation Anomaly of the Water Temperature in Kaiyuan Well

作　　者：张惠菊 付虹 张翔[2] 胡小静 ZHANG Huiju;FU Hong;ZHANG Xiang;HU Xiaojing(Earthquake Agency of Kaiyuan Municipality,Honghe Prefecture of Yunnan Province,Kaiyuan 661199,Yunnan,China;Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

机构地区：[1]云南省红河州开远市地震局,云南开远661699 [2]云南省地震局,云南昆明650224

出　　处：《地震研究》2023年第1期74-81,共8页Journal of Seismological Research

基　　金：中国地震局星火计划(XH21030Y);科技部重点研发子专题项目(2018YFC150330505)联合资助。

摘　　要：针对云南开远井水温2020年3月开始出现的高频波动异常,排查了观测环境、供电电源等可能的影响因素,开展不同层位水温对比观测实验,并根据井孔结构及观测含水层特征,探讨了引起不同层位井水温波动异常的物理机制。结果表明:观测环境及供电系统不是引起水温变化的因素,主要是由于井孔储水裂隙受到岩体变形而发生闭合与开启,造成了进入井孔内高温水的减少与增加,从而引起井水温下降与快速上升,这可能是区域构造活动增强引起的,周边发生的一系列中强以上地震是区域构造活动增强的结果。The water temperature in Kaiyuan Well started to rise and drop anomalously since March,2020.To find the cause,we checked the possible influencing factors like the observational environment of the Well,the power supply system of the water-temperature instrument,and further conducted a comparative monitoring of the water temperature at different depths in the Well.On the basis of the structure and the aquifer of the Well,we discussed the physical mechanism causing the anomalous fluctuation of the water temperature in the Well.We found that the environmental factors or the power supply system did not cause the variation of the water temperature;the main reason was that the rock mass deformation caused the reservoir fissures to close or open,then the hot water in the reservoir fissures became less or more.As a result,the water temperature in the Well consequently fell or rose rapidly.The regional tectonic activity intensified,giving rise to the rock mass deformation and causing medium-and strong-earthquakes in the vicinity.

关 键 词：水温异常 高频波动 机理分析 云南 

分 类 号：P315.723[天文地球—地震学]