Effect of layered joints on rockburst in deep tunnels

He, Mingming; Zhao, Jinrui; Deng, Bianyuan; Zhang, Zhiqiang

doi:10.1007/s40789-022-00489-x

Cited by 19 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous experiments and simulations proved that the orientation of joints has a great influence on the strength and fracture development of rock-like or brittle materials [45]. However, only a few joints are often generated experimentally, and the real geometry of the joints cannot be reproduced in numerical simulations.…”

Section: Effect Of Different Orientationsmentioning

confidence: 99%

RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

Song,

Chen,

Zhu

et al. 2024

CMES

View full text Add to dashboard Cite

When the geological environment of rock masses is disturbed, numerous non-persisting open joints can appear within it. It is crucial to investigate the effect of open joints on the mechanical properties of rock mass. However, it has been challenging to generate realistic open joints in traditional experimental tests and numerical simulations. This paper presents a novel solution to solve the problem. By utilizing the stochastic distribution of joints and an enhanced-fractal interpolation system (IFS) method, rough curves with any orientation can be generated. The Douglas-Peucker algorithm is then applied to simplify these curves by removing unnecessary points while preserving their fundamental shape. Subsequently, open joints are created by connecting points that move to both sides of rough curves based on the aperture distribution. Mesh modeling is performed to construct the final mesh model. Finally, the RB-DEM method is applied to transform the mesh model into a discrete element model containing geometric information about these open joints. Furthermore, this study explores the impacts of rough open joint orientation, aperture, and number on rock fracture mechanics. This method provides a realistic and effective approach for modeling and simulating these non-persisting open joints.

show abstract

Section: Effect Of Different Orientationsmentioning

confidence: 99%

RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

Song,

Chen,

Zhu

et al. 2024

CMES

View full text Add to dashboard Cite

show abstract

“…In this study, the force acting on the force chain arch is analyzed, and its stability is discussed. The refined understanding of the force chain arch provides better insights into the formation, evolution and mechanisms of geological disasters and thus also contributes to the improvement of early warning models and monitoring systems [32,33].…”

Section: Introductionmentioning

confidence: 99%

Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Wang,

Zheng,

Xue

2024

Applied Sciences

View full text Add to dashboard Cite

Rock and soil masses in geotechnical engineering projects, such as tunnels, mines and slopes, undergo relative motion, exhibiting mechanical characteristics of solid–fluid transition under critical conditions. This work analyzes the characteristics of the solid–fluid transition interface and the mode of load transfer through biaxial compression particle flow photoelastic experiments on granular materials. The study documents that this interface forms an arch shape, marked by a force chain arch. The granular material exhibits two distinct states depending on its position: below the arch, the granular material is in a solid–fluid transitional state, with bearing capacity reduced, while above the arch, it is in a stable solid state, capable of bearing the overlying rock layer’s load. The presence of the force chain arch alters the direction of the originally downward-transferring load, redirecting it along the trajectory of the arch. Analysis of the force and stability of the force chain arch revealed that the arch shape parameters and boundary loads control the instability of the arch. Changes in the overlying and lateral loads lead to different types of instability of the force chain arch. The findings of the study are crucial for underground engineering construction and for the prevention of geological disasters related to granular material.

show abstract

“…In summary, scholars in China and abroad studied the occurrence mechanism of rockburst mainly based on coal-rock properties, force sources, and mining (Du et al, 2022;He et al, 2022;Huang et al, 2022;Lou et al, 2023). However, there is little research conducted on energy evolution during rockburst development in deep roadway surrounding rocks under high static elastic energy.…”

Section: Introductionmentioning

confidence: 99%

Energy evolution mechanism during rockburst development in structures of surrounding rocks of deep rockburst-prone roadways in coal mines

Xuan,

Cheng,

et al. 2023

Front. Energy Res.

View full text Add to dashboard Cite

Influenced by the deep high-stress environment, geological structures, and mining disturbance in coal mines, the frequency of rockburst disasters in roadways is increasing. This research analyzed energy evolution characteristics during rockburst development in the elastic bearing zone and energy conversion in the plastic failure zone. The critical energy criteria for structural instability of roadway surrounding rocks were deduced. Numerical software was also applied to simulate the energy evolution during rockburst development in surrounding rocks of rockburst-prone roadways under conditions of different mining depths and coal pillar widths. The occurrence mechanism of rockburst deep in coal mines was analyzed from the perspective of energy in structures of deep roadway surrounding rock in coal mines. The research results show that the critical energy criteria are closely related to the elastic strain energy stored in deep roadway surrounding rocks and the energy absorbed by support systems. The impact energy in roadways is directly proportional to the square of the stress concentration factor k. Moreover, as the mining depth increases, the location of the peak point of maximum energy density gradually shifts to coal ahead of the working face. The larger the mining depth is, the more significantly the energy density is influenced by advanced abutment pressure of the working face and the wider the affected area is. With the increment of the coal pillar width, the distance from the peak point of energy density to the roadway boundary enlarges abruptly at first and then slowly, and the critical coal pillar width for gentle change in the distance is 30 m. Changes in the peak elastic energy density in coal pillars with the coal pillar width can be divided into four stages: the slow increase stage, abrupt increase stage, abrupt decrease stage, and slow decrease stage. The elastic energy density is distributed asymmetrically in deep roadway surrounding rocks in coal mines. Under the action of structures of roadway surrounding rocks, energy evolution in these structures differs greatly during rockburst development under conditions of different coal pillar widths. This research provides an important theoretical basis for the support of rockburst-prone roadways during deep coal mining.

show abstract

Effect of layered joints on rockburst in deep tunnels

Cited by 19 publications

References 38 publications

RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Energy evolution mechanism during rockburst development in structures of surrounding rocks of deep rockburst-prone roadways in coal mines

Contact Info

Product

Resources

About