基于颗粒非连续变形分析和光滑节理模型的层状岩体力学特性研究

doi:10.3724/1000-6915.jrme.2025.0670

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摘要在非连续变形分析（DDA）框架下推导并实现光滑节理模型，结合室内试验结果，研究不同层理倾角与细观参数下层状岩体的强度与破坏规律。首先利用光滑节理模型构建7种不同倾角的层状岩体试样，通过单轴压缩模拟进行光滑节理模型微观参数的敏感性分析。结果表明：试样抗压强度随层理倾角变化呈各向异性，层理倾角为0°或15°时强度最高，60°或75°时最低；节理抗拉强度对高倾角层状岩体影响较显著；节理黏聚力在中高倾角范围内作用明显；节理内摩擦角对30°～75°范围的试样影响较大；节理刚度参数对抗压强度影响较小；试样弹性模量受层理倾角和强度参数影响较小，主要受节理刚度影响。基于此，提出颗粒DDA框架下光滑节理模型细观参数的标定方法，并将其应用于层状岩体的力学性质研究。模拟得到的不同倾角下试样的抗压强度和弹性模量变化趋势与理论解大体一致，与试验值吻合较好；模拟的破坏模式也与试验结果匹配良好。模拟结果验证了该方法的有效性，为复杂层状岩体的工程应用，尤其在力学行为预测和破坏模式分析方面提供了新的模拟手段。

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	刘丰1
	2*
	刘泽明1
	2
	任奕霖1
	2
	张彤辉1
	2

关键词 ：岩石力学, 非连续变形分析, 光滑节理模型, 层状岩体, 参数标定

Abstract：This study develops and implements a smooth joint model (SJM) within the framework of particle discontinuous deformation analysis (DDA). By integrating experimental results, the study investigates the strength and failure behavior of stratified rock samples subjected to various bedding inclinations and microparameters. Initially, seven stratified rock samples with differing bedding inclinations were created using the SJM, and a sensitivity analysis of the SJM microparameters was performed through uniaxial compression simulations. The results indicate that the compressive strength of the samples exhibits anisotropy with changing bedding inclination angles, with the highest strength observed at bedding angles of 0°or 15°and the lowest at 60°or 75°. The SJM tensile strength significantly influences samples with high inclinations, while cohesion notably affects samples in the mid-to-high inclination range. The internal friction angle of the SJM has a strong impact on samples within the 30°–75° range. In contrast, the SJM stiffness parameters have a minor effect on compressive strength. The elastic modulus of the samples is less influenced by bedding inclination and SJM strength parameters, with SJM stiffness being the primary influencing factor. Based on these findings, a microparameter calibration method for the Smooth Joint Model within the proposed framework is introduced and applied to analyze the mechanical properties of stratified rock masses. The trends in compressive strength and elastic modulus for different inclination angles observed in the simulations are generally consistent with theoretical solutions and align well with experimental data. Furthermore, the simulated failure modes correlate with the experimental results. The simulation outcomes validate the effectiveness of the proposed method, providing new tools for simulating complex jointed rocks in engineering applications, particularly in predicting mechanical behavior and analyzing failure modes.

Key words： rock mechanics discontinuous deformation analysis (DDA) smooth joint model layered rock mass parameter calibration

引用本文:

刘丰1，2*，刘泽明1，2，任奕霖1，2，张彤辉1，2. 基于颗粒非连续变形分析和光滑节理模型的层状岩体力学特性研究[J]. 岩石力学与工程学报, 2026, 45(3): 713-728.
LIU Feng1, 2*, LIU Zeming1, 2, REN Yilin1, 2, ZHANG Tonghui1, 2. A particle discontinuous deformation analysis approach integrated with smooth-joint model for simulating mechanical properties of layered rock mass. , 2026, 45(3): 713-728.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2025.0670 或 https://rockmech.whrsm.ac.cn/CN/Y2026/V45/I3/713

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