最后，本文以实例分析讨论了横向剪切变形、开孔大小、线布载荷位置和几何参数对临界载荷的影响。
Finally, some examples are given to show the effect of shearing deformation, the hole size, the position of linear load and the geometrical parameter on the critical load.
有关理论对下孔法剪切波测试过程的简化具有一定的指导意义。
The related theory has the meaning of directing the process of the down-hole method of shear wave testing.
目前，潜孔钻机普遍采用冲击回转凿入系统，用以产生回转力矩，对岩石产生剪切作用而成颗粒分离。
Currently, the DTH RIGS use generally a percussion rotary penetration sys-tem to generate the rotating torque that produces a shearing action for breaking rock.
应用推荐