Study on the effect of static fissure on the stress field of anchored rock beam and axial force of bolt

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL Engineering Failure Analysis Pub Date : 2025-03-13 DOI:10.1016/j.engfailanal.2025.109514

Ning Jianguo , Zhang Zhaohui , Wang Jun , Wang Lei , Shi Xinshuai , Hu Shanchao

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Abstract

In order to investigate the effect of static fissure on the stress field of anchored rock beams and the axial force of anchors, this paper deduces the differential equation of shear stress at the anchor-rock interface (later called anchor-rock interface) in the anchored rock beams containing static fissure based on the fracture mechanics theory and solves the equation, which is shown in the results: (1) When the anchor-rock interface is within the disturbance range of the fissure tip, the vertical compressive stress at the anchor-rock interface and the shear stress at the anchor-rock interface also have sudden changes, and the magnitude of the sudden change of shear stress at the upper tip of the fissure is larger than that at the lower tip; (2) When the anchor-rock interface is outside the influence range of fissure tip disturbance, the distribution form of vertical stress at the anchor-rock interface and shear stress at the anchor-rock interface is still a smooth curve. (3) For the axial force of bolt, both at the tip of the fissure show a rapid increase in axial force, with the upper tip of the fissure showing a larger increase in bolt axial force than the lower tip.

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静力裂隙对锚固岩梁应力场和螺栓轴向力的影响研究

为研究静力裂隙对锚固岩梁应力场及锚杆轴力的影响，本文基于断裂力学理论，推导了含静力裂隙锚固岩梁锚岩界面（后称锚杆-岩体界面）剪应力微分方程，并对方程进行了求解，结果如图所示：(1）当锚岩界面处于裂隙尖端扰动范围内时，锚岩界面竖向压应力和锚岩界面剪应力也发生突变，且裂隙上端剪应力突变幅度大于下端剪应力突变幅度；（2）当锚岩界面处于裂隙尖端扰动影响范围之外时，锚岩界面竖向应力和锚岩界面剪应力的分布形式仍为平滑曲线。(3）在螺栓轴向力方面，裂隙顶端的螺栓轴向力均呈快速增长趋势，裂隙上端螺栓轴向力的增长幅度大于裂隙下端。

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.