| 娄经敏,徐世光,李娴,任博文.云南镇雄某矿区地温场特征及影响因素分析[J].矿产勘查,2026,2(2):378-388 |
| 云南镇雄某矿区地温场特征及影响因素分析 |
| Analysis on characteristics and influencing factors of geothermal field in a certain mining area of Zhenxiong, Yunnan |
| 投稿时间：2025-08-18 |
| DOI：10.20008/j.kckc.202602014 |
| 中文关键词: 地温梯度 热导率 地温场分布特征 大地热流 影响因素 |
| 英文关键词: geothermal gradient thermal conductivity geothermal field distribution characteristics heat flow influencing factors |
| 基金项目:本文受云南省盈江至陇川高温热水带地热资源专项调查(D201709)项目资助。 |
|
| 摘要点击次数: 135 |
| 全文下载次数: 35 |
| 中文摘要: |
| 为探究云南镇雄某矿区地温场特征及其主控因素，本文系统整合了钻孔测温数据与地层岩样热导率测试结果，计算了地温梯度与大地热流值，采用克里金插值法绘制其分布图，并估算了 1500~4500 m埋深的地温。结果表明:地温梯度介于 2.37~4.03 ℃/hm、大地热流值分布介于 63.33~89.18 mW/m2，整体呈现东西高、南北低的分布特征。此外，深部地温随埋深递增，1500 m埋深温度范围为 47.97~74.11 ℃，在 4500 m时最高达 207.27 ℃，其分布具有与地温梯度、大地热流协同的规律，且受地温梯度横向差异影响。综合分析表明:矿区地温场异常形成是地质构造、地层岩性与地下水活动耦合作用的结果，YC背斜的张性裂隙与 F1、F2断层为热流上升提供了通道，控制地热异常的空间展布；清虚洞组灰岩与金顶山组粉砂岩的热导率差异，通过调控热传导效率影响地温梯度分异；河水渗流冷却则通过热交换形成局部低温异常。其研究成果为矿区热害防治及地热资源开发提供了理论依据与数据支撑。 |
| 英文摘要: |
| To explore the characteristics of the geothermal field and its main controlling factors in a certainmining area in Zhenxiong, Yunnan Province, this paper systematically integrates the temperature data from bore-holes and the thermal conductivity test results of rock samples from different strata. The geothermal gradient and theheat flow value of the earth were calculated, and their distribution maps were drawn using the Kriging interpolationmethod. The geothermal conditions at depths of 1500 to 4500 meters were estimated. The results show that the geo-thermal gradient ranges from 2.37 to 4.03 ℃/hm and the heat flow value of the earth is distributed between 63.33and 89.18 mW/m2. Overall, it presents a distribution feature of being higher in the east and west and lower in thenorth and south. Additionally, the deep geothermal temperature increases with depth. At a depth of 1500 meters, thetemperature range is 47.97 to 74.11 ℃, and it reaches up to 207.27 ℃ at 4500 meters. Its distribution shows a pat-tern that is in line with the geothermal gradient and the heat flow of the earth, and is also affected by the lateral dif-ferences in the geothermal gradient. Comprehensive analysis indicates that the formation of the abnormal geothermalfield in the mining area is the result of the coupled effect of geological structure, lithology of strata and groundwateractivity. The tensional fractures of the YC anticline and the F1 and F2 faults provide channels for the upward flow ofheat, controlling the spatial distribution of geothermal anomalies. The difference in thermal conductivity between theQingxudong Formation limestone and the Jindingshan Formation siltstone affects the differentiation of the geother-mal gradient by regulating the efficiency of heat conduction. The cooling effect of river water seepage forms locallow-temperature anomalies through heat exchange. The research results provide theoretical basis and data supportfor the prevention and control of thermal hazards and the development of geothermal resources in the mining area. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|