Discontinuity‐controlled slopes constitute potentially fatal risks during exploitation activities in open‐pit mines and severely threaten the safe mining of collieries. To investigate the dynamic mechanical properties of rock with structural planes under periodic cyclic dynamic disturbance, this study took the north side of the Anjialing open‐pit mine as an example. Uniaxial compression tests were carried out on rock samples containing structural planes with different dip angles (θ). The impacts of θ on the strength, deformation characteristics, energy dissipation characteristics, and fracture rules of rock samples under different disturbance stress amplitudes (Δσ) are studied. The test results show that the structural plane affects the mechanical properties of rocks under dynamic perturbation. A closed hysteresis loop curve of rock is formed in each loading and unloading cycle, thus forming three stages: a sparse stage, a dense stage, and another sparse stage. θ, Δσ, and the number of disturbance cycles (n) impact the rock hysteresis loop curve and deformation modulus. The plastic deformation of rock mainly includes an initial deformation stage, an isokinetic deformation stage, and an accelerated deformation and overall failure stage. Moreover, there is a disturbance threshold for Δσ′ of the rock failure, and the evolution law of plastic strain accumulation and n near the disturbance threshold conform to the negative exponential function and the inverse function of the Langevin function, respectively. Based on damage theory, a constitutive model of the structural plane considering a disturbance threshold is proposed.

中文翻译：

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周期性动力扰动下结构面对砂岩试样力学性能影响的实验研究

由不连续性控制的斜坡在露天矿山的开采活动中构成了潜在的致命风险，并严重威胁了煤矿的安全开采。为了研究周期性周期性动力扰动下具有结构面的岩石的动态力学特性，本研究以安家岭露天矿的北侧为例。对岩石样本进行了单轴压缩测试，该样本包含具有不同倾角（θ）的结构平面。的影响θ上的强度，变形特性，能量耗散特性，而根据不同的干扰应力幅岩石样品的断裂规则（Δ σ）进行研究。试验结果表明，结构平面影响岩石在动态扰动下的力学性能。在每个装卸循环中，岩石都形成了闭合的磁滞回线曲线，从而形成了三个阶段：稀疏阶段，致密阶段和另一个稀疏阶段。θ，Δ σ，和干扰的周期数（Ñ）影响岩石的磁滞回线的曲线和变形模量。岩石的塑性变形主要包括初始变形阶段，等速变形阶段以及加速变形和整体破坏阶段。此外，岩石破坏具有Δσ '的扰动阈值，以及塑性应变累积和n的演化规律。在扰动阈值附近，分别符合Langevin函数的负指数函数和逆函数。基于损伤理论，提出了考虑扰动阈值的结构面本构模型。