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斜孔机场的安装方向,必须与钻孔的设计方位角或勘探线方位相一致,否则就会造成开孔偏斜。如果斜孔接近孔口的起始方位角偏斜严重,就必然要进行定向纠斜,从而造成经济损失。因此,提高斜孔安装质量,力争减少或消除地面设施的安装偏差,是保持斜孔起始方位准确的重要保证,也是提高斜孔质量,从而获得准确地质资料的基本条件。斜孔机场定向安装精度的提高,首先取决于所用测量仪器的种类,其次取决于安装程序和技术要求。
The installation direction of the inclined-hole airport must be consistent with the design azimuth of the borehole or the azimuth of the exploration line, otherwise it will cause the opening to deflect. If the initial azimuth angle of the inclined hole near the orifice is severely skewed, orientation correction will be necessary, resulting in economic loss. Therefore, improving the installation quality of slanted holes and striving to reduce or eliminate the installation deviation of ground facilities is an important guarantee for keeping the initial position of the slanted holes accurate, and also an essential condition for improving the quality of the slanted holes so as to obtain accurate geological data. The improvement of the directional installation accuracy of inclined-hole airports depends primarily on the type of measuring instrument used, and on the installation procedure and technical requirements.