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采用下切式锚杆的岩体分离机制：数值有限元法（FEM）分析

Mechanism of Rock Mass Detachment Using Undercutting Anchors: A Numerical Finite Element Method (FEM) Analysis.

作者信息

Wójcik Andrzej, Jonak Kamil, Karpiński Robert, Jonak Józef, Kalita Marek, Prostański Dariusz

机构信息

Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.

Department of Technical Informatics, Lublin University of Technology, 20-618 Lublin, Poland.

出版信息

Materials (Basel). 2024 Sep 11;17(18):4468. doi: 10.3390/ma17184468.

DOI:10.3390/ma17184468
PMID:39336209
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11432968/
Abstract

Undercutting anchors are structural elements used in construction and geotechnics to stabilize both structures and soils. Their main applications include stabilizing slopes and embankments, reinforcing foundations, and providing support during tunnel construction and other underground works. The authors propose the use of these anchors in rock mass detachment technology. This article presents a comprehensive analysis of the mechanism behind rock mass detachment using an undercutting anchor. Particular attention is given to the influence of parameters such as the fracture energy of the medium and the coefficient of friction between the medium and the anchor head on the detachment process of rock elements during anchor expansion in the drilled hole. Numerical FEM analysis was employed to model the effect of changes in the shape and size of failure cones under varying simulation conditions. The discussed problem is crucial for evaluating the effectiveness of this anchor design under non-standard conditions, particularly in the unconventional destruction of rock media.

摘要

下切式锚杆是建筑和岩土工程中用于稳定结构和土壤的结构元件。它们的主要应用包括稳定边坡和路堤、加固基础以及在隧道施工和其他地下工程中提供支撑。作者提议在岩体分离技术中使用这些锚杆。本文对使用下切式锚杆进行岩体分离的机理进行了全面分析。特别关注了诸如介质的断裂能以及介质与锚头之间的摩擦系数等参数对钻孔中锚杆扩张时岩石元件分离过程的影响。采用有限元数值分析来模拟在不同模拟条件下破坏锥形状和尺寸变化的影响。所讨论的问题对于评估这种锚杆设计在非标准条件下，特别是在岩石介质的非常规破坏情况下的有效性至关重要。

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