几何法快速设定变向巷道的中线

摘要

几何法引变向巷道的中线，是在无精密测量工具的情况下，采用几何学原理，使用尺线等常用工具操作，快速引出巷道变向后的中线。本文详细说明了该方法的具体操作：操作中利用的主要是几何学原理，可以说成是“单位圆法”、“等腰三角形法”，重点是利用“三点一线”的几何原理，确定D、F、G三点。%Under the condition of no precision measuring tools ,geometric method of median of direction-changing roadway refers to median of rapidly direction -changing roadway ,using geometric principle and normal tools such as rules and lines .The paper illustrates the concrete operation of this method and its charts .Basic principle:mainly principle of geometric ,that is ,“Unit Circle Method” ,“Isosceles Triangle Method” ,mainly use geometric principle of“Three Point on One Line” to determine three point of D ,F ,G .