福建仙游郊尾井水位、水温异常成因探讨  

Discussion on Causes of the Water-level and Temperature Anomaly of Jiaowei Observation well in Xianyou,Fujian

作　　者：张清秀[1] 陈莹[1] 李毅伟 秦双龙[1] 刘水莲 ZHANG Qingxiul;CHEN Yingl;LI Yiwei;QIN Shuanlong;LIU Shuilian(Fujian Earthquake Agency,Fuzhou 350001,China;Putian Seismic Station,Putian 351100,China;Yongan Seismic Station,Yongan 366000,China)

机构地区：[1]福建省地震局,福州350001 [2]莆田地震台,福建莆田351100 [3]永安地震台,福建永安366000

出　　处：《华南地震》2018年第2期8-16,共9页South China Journal of Seismology

摘　　要：通过对仙游郊尾井观测系统工作环境和工作状态的检查、观测环境排查、水下电视探测、抽水实验等现场工作,以及对干扰井和观测井的水样进行氢氧同位素和水质成分分析,认为仙游郊尾井水位、水温资料自2017年7月5日开始出现的同步异常现象是附近新打的机井干扰所致,不是地震前兆异常。因打井对基岩的压力增大,使得含水带内裂隙增大,导致出水量增多,同时新打的井破坏了含水带原有的平衡,在多种因素综合影响下,深部水量加大,水位大幅度上升;深部的高温水上涌,使得120 m处的水温升高。同时干扰机井抽水,造成观测井水位、水温出现同步下降。On July 5^（th）, 2017, abnormal changes appeared on the water-level and temperature of Jiaowei observation well, Xianyou. The factors are systematically investigated by the researchers of Fujian Earthquake Agency at the first time. After checking the working status of observing systems and on-site problems, doing underwater photographing work and pumping experiments, analyzing hydrogen and oxygen isotope and water quality of interference well and observation well, the results show that the synchronous abnormal phenomenon is caused by the new dig well, and it is not an earthquake precursors anomaly. Since digging a well gains the rock pressure, the fracture of water-zone increases, at the same time, the new well destroys the balance of water-zone, lead to the increase of deep outlet water. The resist effort of the concrete block at 120 m deep makes the deep water upwelling suddenly, which leads to the sharp rise in water level and the increase of temperature. the synchronous drop on the water-level and temperature are caused by the pumping of interfere well.

关 键 词：水位 水温 异常成因 打井 抽水干扰 

分 类 号：P315.723[天文地球—地震学]