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从地質工作通报15期中看到“对掌握斜孔傾角的体会”后,我在某些方面有不同看法,現提出来和大家研究。首先对“斜孔傾角上漂的規律”問題,我認为:一般鑽机在鑽进中是难以保持鑽孔原设計的角度的,尤其在斜孔鑽进中,其弯曲的程度就更加严重,而且一般均向上傾斜(漂)。在較硬的岩石中鑽进(例8—10級岩石),因井壁間隙較小,所以弯曲程度也小;而在5、6級岩石中使用鑽粒鑽进(实际很少用)。因井壁間隙大,則弯曲程度也大;如用合金鑽进,其
From the 15th issue of the Geological Work Bulletin, I have seen “having a grasp of the inclination angle of slant holes” and I have different views in some aspects and I now propose to discuss with you. First of all, on the issue of “the law of inclined hole inclination drift”, I think it is difficult for a typical drilling machine to keep the original design of drilling hole during drilling. Especially in inclined hole drilling, the degree of bending is even more Serious, and generally inclined upward (drift). Drilling in harder rocks (eg, rocks of Class 8-10) results in a small degree of bending due to the smaller borehole clearance; drilling is used in rocks of grades 5 and 6 (practically seldom used). Because of the borehole gap, the degree of bending is also large; such as drilling with alloy