Moreover, study is made on deformation and stresses of adjacent rocks, which will provide a basis for research on rock-cutting rules of RWD, and improvement of reamers.

• 并对井眼围岩变形和应力分析及强度进行了研究,为研究随钻扩眼的破岩规律和对扩眼器进行改进提供了一种方法和研究的基础。