Author:
Wang Xinfeng,Zhang Yiying,Zhang Qiao,Wei Youyu,Liu Wengang,Jiang Tian
Abstract
In view of the problems of large deformation of surrounding rock, high in-situ stress, and serious soft fracture of rock stratum in deep soft rock roadway, the instability deformation failure mode of deep soft rock roadway is analyzed theoretically. The FLAC3D software is used to establish a three-dimensional numerical model of surrounding rock damage under load, and to study the displacement, stress, and plastic expansion process of damage and failure evolution in the surrounding rock of the roadway. The mechanical response mechanism of deep soft rock roadway surrounding rock bending deformation, elastoplastic transformation, and unloading failure is verified by MATLAB numerical analysis, and the space-time evolution characteristics of soft rock deformation and failure are revealed. The results show that the surrounding rock of deep soft rock roadway has many failure modes, such as obvious displacement and deformation, high stress concentration, and intensified plastic transformation in the surrounding rock. The vertical stress in the surrounding rock is concentrated at the direct top and bottom, and the horizontal stress is concentrated at the roadway side and bottom; plastic deformation and failure first appeared at the roadway side, and then extended to other parts. The research conclusion provides an important reference for surrounding rock control and roof management of high-stress soft rock roadway under deep excavation disturbance.
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference29 articles.
1. The equivalent ellipse model and simulation analysis of Destressing by Cutting Groove in deep soft rock roadway;Zuo;J. China Univ. Min. Technol.,2019
2. Application of a combined supporting technology with U-shaped steel support and anchor-grouting to surrounding soft rock reinforcement in roadway
3. Analysis of Surface Deformation and Settlement Characteristics Caused by Tunnel Excavation and Unloading
4. Deformation and damage mechanisms and coupling support design in deep coal roadway with compound roof;He;China J. Rock Mech. Eng.,2007
5. Research on deep shaft hoisting dynamics;He;Adv. Mech.,2021