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冶金地质单位,目前在有磁性干扰的矿区,较广泛地应用定盘仪(或两用测斜仪)以连环定向法来测定钻孔弯曲.用此法时,在上、下两仪器测定了各自所处孔位的天顶角θ_1、θ_2及终点角ψ_1、ψ_2后,再用数学公式来算出两测点的方位角差,所以这是方位角的间接测量法.其测量精度将取决于测量装置本身的精度和计算公式的正确性.这里,仅对计算公式加以探讨.目前应用的计算公式有两个,即
Metallurgical Geological units, currently in magnetic interference mining area, the more widely used fixed-plate instrument (or dual-inclinometer) to determine the direction of the drill hole bending method using this method, the upper and lower instruments measured After the zenith angles θ_1, θ_2 and the terminal angles ψ_1, ψ_2 of the holes in which they are located, the azimuth difference between the two measuring points can be calculated by the mathematical formula, so this is the indirect measurement of the azimuth angle. The measurement accuracy will depend on Measuring the accuracy of the device itself and the correctness of the calculation formula. Here, only the calculation formula is discussed. At present, there are two formulas for calculating