Particle mechanics method of fracture and failure patterns in surrounding rock of roadways under static-dynamic loads

IF 6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2026-05-20 DOI:10.1016/j.tafmec.2026.105687

Xiao Zhou , Hossein Nowamooz

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引用次数: 0

Abstract

Investigating the damage accumulation and fracture mechanisms of fractured rock masses under combined static in-situ stress and dynamic perturbations (e.g., mining-induced vibrations) is crucial for predicting roadway instability, optimizing support design, and mitigating dynamic hazards. This study conducts numerical simulations using PFC2D, with a static-dynamic loading module implemented via FISH functions, to analyze the mechanical response of roadway surrounding rock and the dynamic propagation characteristics of cracks. The results reveal the micro-mechanical mechanisms governing crack propagation under varying dynamic loading conditions and are further extrapolated to the failure behavior of mining roadways during extraction. Numerical results agree well with physical experiments, showing distinct shear bands on both roadway sides and crack coalescence patterns significantly influenced by dynamic loading frequency, amplitude, and fracture dip angle. The evolution of mining-induced fractures under static-dynamic loading follows a consistent sequence: point-like crack initiation → line-like propagation → surface-like coalescence. Damage in surrounding rock of roadway severity intensified with increasing mining distance. These insights enhance the understanding of dynamic failure mechanisms in fractured rock masses and support hazard assessment in deep mining environments.

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静动荷载作用下巷道围岩破裂破坏模式的颗粒力学方法

研究静态地应力和动态扰动（如采动振动）联合作用下裂隙岩体的损伤积累和断裂机制，对于预测巷道失稳、优化支护设计和减轻动态危害至关重要。采用PFC2D进行数值模拟，通过FISH函数实现静动加载模块，分析巷道围岩的力学响应和裂缝的动态扩展特性。研究结果揭示了不同动加载条件下控制裂纹扩展的微观力学机制，并进一步推断了采动过程中矿山巷道的破坏行为。数值模拟结果与物理实验结果吻合较好，表明动加载频率、动加载幅值和动加载倾角对巷道两侧剪切带和裂纹合并模式有显著影响。静动荷载作用下采动裂隙的演化遵循点状裂隙起裂→线状扩展→面状贯通的顺序。巷道围岩破坏程度随着开采距离的增加而加剧。这些见解增强了对裂隙岩体动态破坏机制的理解，并为深部开采环境的危害评估提供了支持。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.