标题：Research of stress distribution evolution law and influencing factors
作者：Yin, Yan-Chun ;Zhao, Tong-Bin ;Tan, Yun-Liang ;Zhang, Ze
作者机构：[Yin, Yan-Chun ;Zhao, Tong-Bin ;Tan, Yun-Liang ;Zhang, Ze ] State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, College of 更多
来源：Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering
摘要：With laboratory tests and particle flow simulation, stress distribution evolution law and influencing factors along anchorage segment are studied. The failure process of anchor system can be divided into three stages: viscoelastic stage, de-viscosity stage and failure stage. In the viscoelastic stage, the shear stress first increases and then decreases along the anchorage segment, and the peak point is close to the pull end. In the de-viscosity stage, the bond at the pull end first fails, and then expands to the internal layer. The shear stress peak point also moves inward. Elastic modulus of anchor and anchor agent influences the stress distribution. With the increase of anchor's modulus and decrease of anchor agent's modulus, the intensity of stress at pull end weakens.