摘要
三向压缩应力状态促使受力物体产生塑性变形,因而宜用塑性力学的观点去分析钻进过程中岩石破碎原理的理论基础。根据岩石材料性质的特点,本文讨论了莫尔理论中静水压力(平均正应力)的影响因素,共轭剪切破裂面的交角,以及莫尔理论的适用条件。作者还论述了借鉴塑性力学滑移线理论用于构造钻进条件下岩层滑移线场的可能性,并提出了其基本方法。
The compressive states in 'three perpendicular directions will prompt any body acted by forces to produce the plastic deformation. Thus,it is reasonable that the fundamentals of rock failure in drilling ran be analyzed by the plastic mechanics. According to the mechanical properties of rocks, the influence factor of hydro-static stress ( mean normal stress ) states in Mohr theory, two conjugate planes of shear fracture making angles and an inference from Mises yield condition coupled with the hydrostatic stress factor are described. Finally, the paper discusses the possibility that the slip line theory in plastic mechanics can be used to constitute the slip line field of rocks below a bit, and makes the suggestion of its basic method.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1990年第2期221-228,共8页
Earth Science-Journal of China University of Geosciences
关键词
岩石
碎碎
滑移线场
构造
rock failure, plastic deformation, con jugate shear fracture planes, yield condition, slip line field.
