引言 1985年我们在湖南某石墨矿没有“瓦斯”条件下,进行过7″级导线测量,其地理位置约为东经113度、北纬25°30′,地处亚热带,虽是11月天气,仍然雾雨较多,湿度大,给红外测距仪的观测造成了一定的困难。但我们为了解决40度急倾斜巷道的长距离测量和结合学生进行实习,并提高观测速度,仍然采用了红外测距仪进行距离观测,取得了较好的成果,达到了规程中关于7″级导线精度要求。 Introduction In 1985, we conducted a 7 “wire survey at a graphite mine in Hunan without” gas “. The geographical location is about 113 degrees east longitude and 25 degrees north latitude 25 degrees. It is located in the subtropical zone. It is still the weather in November Fog and rain more, humidity, to the infrared rangefinder observations caused some difficulties, but we in order to solve the 40-degree steep roadway long distance measurement and combined with the students internships, and to improve the observation speed, still using infrared Distance from the instrument observation, and achieved good results, reached the rules on the 7 ”level wire accuracy requirements.