【摘要】 在黄淮地区破裂井壁治理技术中，开切环形卸压槽是最关键的技术之一。本文分析探讨了开卸压槽前后及卸压槽充填后的井壁受力特性和卸压槽作用机理，得到了在均布正、负摩擦力作用条件下井壁的卸压高度和最大竖向应力作用位置，为卸压槽的设计提供了理论依据。更多还原

【Abstract】 In the prevention techniques of fracture shaft lining in the Yellow and Huai River areas, the channeling of circular relieving slot is one of the key techniques. In this paper, an analysis and exploration of the load characteristic of shaft lining and the work mechanism of a relieving slot are made. The calculating formulas for the height of pressure relief and the place of maximum vertical stress are got under uniform positive and negative frictional forces, giving theory support to the design of the relieving slot.更多还原