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过去掏挖坎儿井新豎井的吊线方法是:先将地下渠道挖得很直,到需要挖新竪井的地方,在距渠道1.5米高的壁中央,挖一个灯窝子,安放一个点着的小油灯;再从下一个竪井口的地面辘轳上吊下两根麻绳。站在这个井底绳旁的人看到这两根绳在一条线上,并对准前面灯光的中心时,就叫地面上的人也根据这两根直线与地下渠道相同的方向在前面插一个木桩,定出方向。然后丈量地面,使二个竪井的距离,地面与地下渠道一致。
In the past, the method of digging and digging a new shaft of a KARREN new shaft was as follows. First, the underground channel was dug straight until it needed to dig a new shaft. At the center of the wall 1.5m high from the channel, dig a lampholder and place a point Oil lamp; and then from the next vertical shaft mouth of the surface of the two hanging rope hemp rope. When the man standing by the bottom of the string sees the two ropes in line and is aligned with the center of the front light, he is called by the people on the ground to follow the two straight lines in the same direction as the underground channel A stake, set the direction. Then measure the ground so that the distance between the two shafts, the ground and underground channels consistent.