对具有机械性质各向异性的岩石中所钻钻孔的孔斜资料的统计表明,岩石机械性质的各向异性是造成钻孔弯曲的极为重要而有规律的因素之一。四川省在钻探实践中探讨钻孔弯曲时得出的结论具有普遍性的意义,其主要结论是:钻孔弯曲最严重的都发生在变质岩矿区;钻孔弯曲几乎取决于钻孔轴线和地层的“迁层角”,并向垂直于层面、片理面趋进、其稳定 The statistics of the borehole inclination of the drilled holes in the rock with anisotropic mechanical properties show that the anisotropy of the mechanical properties of the rock is one of the most important and regular factors that cause the bending of the borehole. The conclusion reached by Sichuan Province when drilling and bending is discussed is of universal significance. The main conclusions are as follows: The most serious drilling and boring occurs in the metamorphic rock mining area. The drilling and bending depend almost on the axis of drilling and formation Of the “moving angle”, and to the vertical plane, cleavage plane into Jin, its stability