This paper established the two buildup trajectory tangents angle calculation model, through considering the stress of the cutting, this paper made the tangents angle more refined. The results show that the stress of cuttings is the smallest at the angle 30° and the most easy to form cutting bed. So we should avoid the optimal tangents angle in 30°%本文建立了双增型剖面的最优切线段井斜角的计算模型,通过考虑稳斜段岩屑颗粒的受力情况对最优稳斜角的取值范围进行了细化.计算结果表明,在稳斜角为30.时,岩屑颗粒的受力最小,最容易形成岩屑床,因此避免最优切线段井斜角在30.附近,保持切线段井斜角在取值范围内尽可能远离30°.
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