黄陵矿区井下垂直大气折光系数探讨

Discussion of Underground Mine Vertical Atmospheric Refraction Coefficient in Huangling Mining Area

本文以黄陵地区某矿井三角高程实测数据为例,用对向观测方法探讨了井下大气折光系数与相对高差之间的关系,得出井下高差对大气折光系数影响较大的结论,即当高差小于10m时,大气折光系数相对稳定;超过10m时,大气折光系数会激增;当高差达到20m后,大气折光系数又会趋于稳定。实验与分析表明:井下大气折光系数不宜都采用0.14,如在井下巷道相对高差较大时可考虑采用与实际情况更相符的1.55为好。

This paper takes the measured data of a certain trigonometric elevation in the Huangling area as an example,and discusses the relationship between the atmospheric refractive index and the relative height difference using the opposite observation method,and draws the conclusion that the underground height difference has a great influence on the atmospheric refractive index.When the height difference is less than10 m,the atmospheric refractive index is relatively stable;when it exceeds 10 m,the atmospheric refractive index will increase sharply;when the height difference reaches 20 m,the atmospheric refractive index will tend to be stable.Experiments and analysis have shown that underground atmospheric refractive index should not use 0.14,such as in the relatively large height difference in the underground roadway can be considered with1.55 which is more consistent with the actual situation.