【摘要】 本文介绍了在特殊条件下利用方位改正数标定巷道中线的方法。实际操作中不需要观测各导线点的坐标,只需要算出各导线边的方位,然后求出改正数,即可标定巷道中线,具有很强的实用价值。更多还原

【Abstract】 This paper introduces the method of marking tunnel center line by position correction number under special conditions. In actual operation,only need to count the position of each wire side without surveying each wire point coordinate,then derive the corrective number and mark the tunnel center line,which has a very strong practical value.更多还原