目前,主要巷道掘进标定中线多用经纬仪按照施工方向逐条标定前方三根中线,由于井下测量条件差,要给好一组中线,占用时间长,影响掘进施工.为了提高工作效率,理介绍一种简易的测量方法.(1)在需要标定中线的巷道中线点O处设置经纬仪,后视后,按要求拨水平角,使仪器视线指向施工方向,前视人员此时选定中线点A,用经纬议精确标定,并固定牢稳(见图1). At present, the main roadway calibration standard multi-theodolite multi-theodolite in accordance with the direction of construction one by one calibration of the front three center line, due to poor measurement conditions downhole, to give a good set of centerline, take a long time, affecting the construction of excavation.In order to improve work efficiency, (1) Set the theodolite at the middle point O of the laneway where the center line needs to be calibrated, and after the rear view, dial the horizontal angle according to the requirements so that the sight line of the instrument points to the construction direction. Accurate calibration, and fixed firmly (see Figure 1).