To research the anchoring effect of large deformation bolt, tensile and drawing models are established. Then, the evolution laws of drawing force, bolt axial force and interfacial shear stress are analyzed. Additionally, the influence of structure element position on the anchoring effect of large deformation bolt is discussed. At last, the energy-absorbing support mechanism is discussed. Results show that during the drawing process of normal bolt, drawing force, bolt axial force and interfacial shear stress all gradually increase as increasing the drawing displacement, but when the large deformation bolt enters the structural deformation stage, these three values will keep stable; when the structure element of large deformation bolt approaches the drawing end, the fluctuation range of drawing force decreases, the distributions of bolt axial force and interfacial shear stress of anchorage section are steady and the increasing rate of interfacial shear stress decreases, which are advantageous for keeping the stress stability of the anchorage body. During the working process of large deformation bolt, the strain of bolt body is small, the working resistance is stable and the distributions of bolt axial force and interfacial shear stress are steady. When a rock burst event occurs, the bolt and bonding interface cannot easily break, which weakens the dynamic disaster degree.

为了研究大变形螺栓的锚固效果，建立了拉伸和拉伸模型。然后，分析了拉拔力，螺栓轴向力和界面剪切应力的演变规律。此外，还讨论了结构单元位置对大变形螺栓锚固效果的影响。最后讨论了能量吸收的支撑机理。结果表明，在普通螺栓的拉拔过程中，拉拔力，螺栓轴向力和界面剪切应力均随着拉拔位移的增加而逐渐增大，但当大变形螺栓进入结构变形阶段时，这三个值将保持稳定。当大变形螺栓的结构元件接近拉拔端时，拉拔力的波动范围减小，锚固断面的螺栓轴向力和界面剪应力分布稳定，界面剪应力的增加率减小，有利于保持锚固体的应力稳定性。在大变形螺栓工作过程中，螺栓体的应变小，工作阻力稳定，螺栓轴向力和界面剪切应力的分布稳定。当发生岩石破裂事件时，螺栓和粘结界面不会轻易断裂，从而削弱了动态灾害程度。螺栓体应变小，工作阻力稳定，螺栓轴向力和界面剪切应力分布稳定。当发生岩石破裂事件时，螺栓和粘结界面不会轻易断裂，从而削弱了动态灾害程度。螺栓体应变小，工作阻力稳定，螺栓轴向力和界面剪切应力分布稳定。当发生岩石破裂事件时，螺栓和粘结界面不会轻易断裂，从而削弱了动态灾害程度。