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矿井平面控制测量,即为经纬仪导线测量,分为基本控制和采区控制导线两类。对于井下基本控制导线的边长,需加入尺长、温度、倾斜、垂曲以及化算到高斯平面等项改正;随着开采深度的增加,还需考虑加入化算到海平面的改正。这些改正数,现多用对数表、计算机、计算尺或笔算计算出,然后加入导线边长,进行坐标计算。由于改正数项目较多,计算工作量也较大,而且易出差错。因此,有的兄弟局,矿已采用图解方法求这些改正数。为了提高工作效率,减少
Mine plane control measurements, that is, theodolite wire measurement, divided into basic control and mining control wire two categories. For the basic control of underground wire length, the need to join the length, temperature, tilt, vertical curve and calculate the Gaussian plane and other items to be corrected; with the increase of mining depth, the need to consider the calculation to the sea level correction. These correction numbers, are now mostly using a logarithmic table, computer, ruler or pen calculations, and then add the wire side length, coordinate calculation. Due to the large number of correction items, the calculation workload is also large and error-prone. Therefore, some fraternal bureaus and mining authorities have used graphical methods to find these corrections. In order to improve work efficiency, reduce