Practices and analysis on ultra long holing-through survey in Huangyuchuan Mine

In order to ensure an accurate holing-through of the mine transportation roadway with a long distance at the surface and underground of mine between the main shaft and auxiliary shaft in Huangyuchuan Mine,an optimized design of the survey operation was conducted before the holing-through.The paper analyzed the influen ce factors of each parameter site measured accuracy for the GPS controlled survey,connection survey,gyroscopic orientation survey,total station traverse measurement and others to determine the survey plan and the data processing method.In the heading process of the mine roadway, according to the traverse measurement and gyroscopic ori entation results as well as the timely adjusted heading direction and to the connecting traverse with the error,the weighting of different survey results was rationally determi ned,rigorous adjustment and data processing were conducted and the corrections were made on the holing-through traverse timely.The results showed that the advanced s urvey technology and rational data processing method applied could ensure the long distance accurate holing-through between the two mine shafts.The accuracy of the 20 km holing-through project reached an error of-0.182 m in the horizontal direction and an error of-0.128 m in an elevation direction.