Phase field model of tunnel excavation damage zone

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2025-02-03 DOI:10.1007/s40571-025-00908-1

Xuxin Chen, Jinxiao Liu, Xiao Wang, Zhe Qin, Vahab Sarfarazi

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Abstract

Excavation damage zone (EDZ) is an important index to evaluate the damage and failure of surrounding rock. Based on the rock phase field model considering rock nonlinear fracture criteria, the concept of excavation damage zone model is defined, the zoning criterion of excavation damage zone model is proposed. The topological region centered on the contour boundary of the tunnel is defined as damage phase field. The tunnel excavation damage zone based on the modified phase field model, and the inflection point of damage phase field gradient change is taken as the criterion of EDZ. By comparing and analyzing the site monitoring and numerical simulation results of Mine-by tunnel excavation damage zone at −420 m URL, the error is about 0.5%, which verifies the validity of the tunnel EDZ phase field model. The distribution characteristics of EDZ of tunnels with different section shapes are analyzed, the main damage characteristics and key reinforcement areas of tunnels with different shapes are expounded, and the rationality of phase field model of excavation damage zone is further explained.

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隧道开挖损伤区的相场模型

开挖损伤区（EDZ）是评价围岩损伤破坏的重要指标。在考虑岩石非线性断裂准则的岩相场模型的基础上，定义了开挖损伤区模型的概念，提出了开挖损伤区模型的分区准则。以隧道轮廓边界为中心的拓扑区域定义为损伤相场。基于修正相场模型的隧道开挖损伤区，以损伤相场梯度变化的拐点作为EDZ判据。通过对- 420 m处矿井掘进巷道开挖损伤区现场监测结果与数值模拟结果的对比分析，误差约为0.5%，验证了隧道EDZ相场模型的有效性。分析了不同断面形状隧道的EDZ分布特征，阐述了不同断面形状隧道的主要损伤特征和关键加固区域，进一步说明了开挖损伤区相场模型的合理性。

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来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.