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首页> 外文期刊>Rock Mechanics and Rock Engineering >Numerical Simulation of P-Wave Propagation in Rock Mass with Granular Material-Filled Fractures Using Hybrid Continuum-Discrete Element Method
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Numerical Simulation of P-Wave Propagation in Rock Mass with Granular Material-Filled Fractures Using Hybrid Continuum-Discrete Element Method

机译：用杂种连续元件法用颗粒材料填充骨折对岩体岩体的数值模拟

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摘要

In this paper, a cohesive fracture model is applied to model P-wave propagation through fractured rock mass using hybrid continuum-discrete element method, i.e. Universal Distinct Element Code (UDEC). First, a cohesive fracture model together with the background of UDEC is presented. The cohesive fracture model considers progressive failure of rock fracture rather than an abrupt damage through simultaneously taking into account the elastic, plastic and damage mechanisms as well as a modified failure function. Then, a series of laboratory tests from the literature on P-wave propagation through rock mass containing single fracture and two parallel fractures are introduced and the numerical models used to simulate these laboratory tests are described. After that, all the laboratory tests are simulated and presented. The results show that the proposed model, particularly the cohesive fracture model, can capture very well the wave propagation characteristics in rock mass with non-welded and welded fractures with and without filling materials. In the meantime, in order to identify the significance of fracture on wave propagation, filling materials with different particle sizes and the fracture thickness are discussed. Both factors are found to be crucial for wave attenuation. The simulations also show that the frequency of transmission wave is lowered after propagating through fractures. In addition, the developed numerical scheme is applied to two-dimensional wave propagation in the rock mass.
机译：在本文中，使用混合岩体采用混合岩体的裂缝岩体模型，采用混合岩体的模型裂缝模型，即通用不同元素代码（UDEC）。首先，提出了一种与UDEC的背景的粘性裂缝模型。粘性裂缝模型通过同时考虑弹性，塑料和损坏机制以及改进的故障功能来考虑岩石骨折的逐渐失效而不是突然的损坏。然后，引入了通过含有单个骨折的岩体和两个平行裂缝的岩石传播的一系列实验室测试，并描述了用于模拟这些实验室测试的数值模型。之后，模拟和呈现所有实验室测试。结果表明，所提出的模型，特别是粘性骨折模型，可以在岩体中具有非焊接和焊接骨折的波形传播特性，具有且不填充材料。同时，为了识别裂缝对波传播的意义，讨论了具有不同粒度和裂缝厚度的填充材料。发现这两个因素对于波浪衰减至关重要。仿真还表明，在通过裂缝传播后，透射波的频率降低。此外，所开发的数值方案应用于岩体中的二维波传播。

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