摘要
在矿区长期疏干条件下,不仅地下水流场发生了重大改变,地下水的温度场也发生了明显变化,仔细研究这种地下水的温度变化特征可以深化矿区水文地质条件及其变化的认识。在利用福建马坑铁矿长期监测的地下水温度数据的基础上,分析了疏干条件下地下水温度场的平面分布以及变化特征,探讨了影响地下水温度平面分布以及动态变化的因素。结果表明,矿区地下水的运动特征决定了矿区地下水温度的平面分布呈现西高东低的整体趋势,以及南侧南西高北东低,北侧北西高南东低的局部趋势,受地下水循环深度的影响,副井附近出现高温异常;由于矿区接受温度较低的补给水源逐渐增大,近几年来矿区地下水温呈现整体下降的趋势,且下降速率逐年增大,反映了矿区地下水的补给还在逐渐增加。
Under the drainage condition for a long time, not only the groundwater flow field changed, but also the temperature field has changed. A careful study of the groundwater temperature characteristics can deepen the understanding of hydrogeological condition and its variation in the mining area. This paper analyzes the groundwater temperature field plane distribution and varying characteristics and discusses their affecting factors by using Makeng iron mine＇s long-term monitoring of groundwater temperature data. The results show that the movement features of groundwater determining the plane distribution of groundwater temperature are higher in the west and lower in the east in general. Meanwhile, it is higher in the southwest in the southern part and lower in the southeast in the northern part locally. The groundwater temperature near the auxiliary shaft shows higher than normal condition due to the influence of groundwater circulation depth. As a result of the lower temperature that recharged the mining area increased gradually, the groundwater temperature presented decline generally and its decrease rate had the tendency of increase year by year, which reflected the groundwater recharge was still increasing gradually.
出处
《地质科技情报》
CAS
CSCD
北大核心
2012年第5期136-142,共7页
Geological Science and Technology Information
关键词
地下水温度
疏干条件
分布特征
变化特征
指示意义
groundwater temperature
drainage condition
distribution characteristics
varying characteristics
indicative significance
