提高大型巷道贯通精度的技术方法

Technical Methods of Improving Breakthrough Precision of Large laneway

分析了地面控制网、井下导线测量、立井定向和加测陀螺定向边对贯通大型巷道精度的影响;讨论了提高测量精度的可行性方法.同时,就测距导线边长化归到投影水平面和投影到高斯平面的两项改正误差对精度的影响及测距三角高程能否代替井下一级水准等问题,提出了自己的观点.

In large laneway project it demands high precision while the cumulative error is large. As to the problem of how to minish the error and improve the precision, comprehensive and scientific analysis and sum-up have been made on the survey technologies and methods taken in several large laneway projects of Datong coal mine company in the paper. It discusses the influence of ground control network, underground traverse survey, shaft orientation and gyroscopic orientation edge append-survey on breakthrough precision. It proposes a feasible method to improve the measurement accuracy. It also proposes the author＇s view on problems as follows： the influence of the two correction errors of ranging traverse side reduction to projection plane and its projection to gauss plane on the precision; whether ranging trigonometric level can take the place of underground first-order level and so on.