滇东北铅锌矿山1500 m以浅地温梯度变化规律

Geothermal gradient of Huize lead-zinc mine in the range of 1 500 m

为了研究滇东北某铅锌矿山1500m以浅的地温梯度变化规律,采用浅孔测温法对矿山四个水平的原岩温度进行测定,并根据测定结果进行拟合分析。实测结果表明:由浅及深的地温梯度分别为0.64℃/hm、0.81℃/hm和1.62℃/hm。由于924m处于开拓阶段,更接近原岩温度,且受裂隙承压水的影响最大,因此地温梯度最大。拟合得出矿山地温梯度为1.449℃/hm,原岩温度随采深的增加逐渐变大,该地温梯度可以用来进一步推测一定开采范围内原始状态下的深部原岩温度,研究结果为该地区深部的热害评价提供了基础和依据。

In order to study change law of the shallow ground temperature gradient of1 500 m in a lead-zinc mine in northeastern Yunnan,the temperature of the original rock at four levels in the mine is measured by the method of shallow hole temperature measurement and fitting analysis is performed based on the measurement results.The measured results show that the shallow and deep geothermal gradients are 0.64 ℃/hm, 0.81 ℃/hm and1.62 ℃/hm,respectively.Since the 924 m is in the development stage,it is closer to the original rock temperature and is most affected by confined water in the fissure,so the geothermal gradient is the largest.The fitting obtained the geothermal gradient of the mine is1.449 ℃/hm,and the temperature of the original rock gradually increases with the increase of the mining depth.The geothermal gradient can be used to further speculate that the deep ore temperature in the original state within a certain mining range,and the results provide a basis for the evaluation of deep heat-harm in this area.