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矿山圆曲线巷道测设的方法较多,原理繁简不一。一般以计算简单,标定工作量省,且能满足生产需要为原则。下面介绍以圆弧切线最长为基础测设圆曲线的原理: 一、原理直线掘进巷道开始接近圆曲线巷道时,接近部分的圆曲线巷道可继续利用直线方向。在标定工作中应最大限度利用直线方向,解算方法如下:如图,AD是以O为圃心,R为半径,对应圆心角为M的圆弧;AB、CD为圆弧切线L_o;BF、FC为
There are many methods for mine tunnel surveying and the principles vary. It is generally based on the principle that the calculation is simple, the amount of calibration work is saved, and the production needs can be met. The following describes the principle of setting a circular curve based on the longest arc tangent: 1. Principle When a straight-line excavation roadway begins to approach a round curve roadway, the approaching part of the circular curve roadway can continue to use the straight direction. In the calibration work, the direction of the straight line should be used to the maximum, and the solution method is as follows: As shown in the figure, AD is the heart of O, R is the radius, and the arc corresponding to the center angle is M; AB, CD is the arc tangent L_o; BF FC is