Investigation on Crack Propagation Mechanisms in Surrounding Rock Induced by Excavation Unloading of Deep-Buried Caverns

Donghan Wang, Donghan Wang, Kaiwen Song, Kaiwen Song, Qian Dong, Junhong Huang, Junhong Huang

2025

Abstract

To investigate the deformation patterns and failure mechanisms of roadway surrounding rock under transient excavation unloading, and to simulate the roadway excavation unloading process, a model test system for roadway excavation and unloading was developed. Multiple sets of jointed rock mass model specimens were fabricated using high-strength gypsum materials. Numerical simulations were employed to explore the influences of joint quantity, length, stiffness, and spatial configuration on the failure characteristics of surrounding rock during excavation unloading. The results indicate that under transient unloading conditions: Jointed rock masses exhibit a higher degree of failure compared to intact rock masses. Rock masses containing longer joints demonstrate more pronounced failure phenomena than those with shorter joints. Joint stiffness exerts relatively minor influence on both peripheral displacement and damage extent of the excavation. Rock masses with mixed-length joints show greater susceptibility to failure compared to those with uniform-length joints. Multi-jointed rock masses are more prone to crack formation during unloading, potentially leading to more significant rock deformation and crack propagation. In contrast, rock masses with fewer joints experience less impact under such transient unloading conditions, consequently demonstrating enhanced stability and safety of the surrounding rock.

Paper Citation

in Harvard Style

Wang D., Song K., Dong Q. and Huang J. (2025). Investigation on Crack Propagation Mechanisms in Surrounding Rock Induced by Excavation Unloading of Deep-Buried Caverns. In Proceedings of the 15th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH; ISBN 978-989-758-759-7, SciTePress, pages 366-373. DOI: 10.5220/0013604600003970

in Bibtex Style

@conference{simultech25,
author={Donghan Wang and Kaiwen Song and Qian Dong and Junhong Huang},
title={Investigation on Crack Propagation Mechanisms in Surrounding Rock Induced by Excavation Unloading of Deep-Buried Caverns},
booktitle={Proceedings of the 15th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH},
year={2025},
pages={366-373},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013604600003970},
isbn={978-989-758-759-7},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 15th International Conference on Simulation and Modeling Methodologies, Technologies and Applications - Volume 1: SIMULTECH
TI - Investigation on Crack Propagation Mechanisms in Surrounding Rock Induced by Excavation Unloading of Deep-Buried Caverns
SN - 978-989-758-759-7
AU - Wang D.
AU - Song K.
AU - Dong Q.
AU - Huang J.
PY - 2025
SP - 366
EP - 373
DO - 10.5220/0013604600003970
PB - SciTePress