地震地磁观测与研究2026，Vol.47Issue(3)：70-75,6.DOI:10.3969/j.issn.1003-3246.2026.03.010
章贡沙石井水温梯度测试及结果分析
Water temperature gradient tests and analysis of Zhanggong Shashi monitoring well
摘要
Abstract
To clarify the abnormal mechanism of deep well water temperature in the fault zone and its significance in indicating seismic precursors,a high-precision water temperature measuring instrument(DLZ-1 type,resolution 0.000 1℃)was used to conduct gradient tests on the Zhanggong Shashi observation well,and a comprehensive analysis was carried out in combination with hydrogeological and wellbore structure data.The research reveals that a negative gradient(with a minimum of-0.026 5℃/m)occurs in the 0-220 m well section,indicating that the infiltration of shallow cold water along the fractures(34.5-42.5 m)in winter supposes geothermal heat conduction.Gradient mutation zones exist at 124-135 m,170-180 m and 380-400 m,respectively responding to the drastic change in water flow velocity of the aquifer,the thermal barrier effect of the erosion channel(peak 0.287 9℃/m)and the concealed structural interface.The gradient of the well section over 400 m is stable(0.018 9℃/m),reflecting the regional heat flow background.Abnormal water temperature may be controlled by the coupling of climate,structure and engineering.The low-interference layer>400 m can be used as an advantageous area for monitoring seismic thermal precursors.关键词
水温梯度/章贡沙石井/井水温观测/热对流/地震前兆Key words
water temperature gradient/Zhanggong Shashi monitoring well/water temperature monitoring/thermal convection/seismic precursors引用本文复制引用
余志成,谢斌,曹祖洋,钟智东,邓月圆,罗叶美,张义建,欧阳澍培,江乐宇..章贡沙石井水温梯度测试及结果分析[J].地震地磁观测与研究,2026,47(3):70-75,6.基金项目
中国地震局监测、预报、科研三结合课题(项目编号:CEA-SJH-202601027) （项目编号:CEA-SJH-202601027）
江西省地震局"2111"孵化基金项目(项目编号:FD2111-Y10) （项目编号:FD2111-Y10）
