Stability analysis of tunnel under coal seam goaf: Numerical and physical modeling

Feng, Huang; Shi, Xiaoxiong; Wu, Chong; Dong, Guangfa; Liu, Xingchen; Zheng, Aichen

doi:10.1016/j.undsp.2022.12.006

Cited by 7 publications

(2 citation statements)

References 45 publications

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“…The construction of the tunnel has Buildings 2024, 14, 1356 2 of 15 the potential to facilitate regional economic development, enhance intercity connectivity and collaboration, and enhance the overall economic competitiveness of the region. In summary, the establishment of the tunnel holds considerable importance in facilitating economic progress, enhancing the quality of life for individuals, and optimizing transportation efficacy [8][9][10][11][12]. Figure 1 displays a typical engineering project for an underwater tunnel traversing several zones of fault fractures with high hydraulic pressure.…”

Section: Introductionmentioning

confidence: 99%

Progressive Failure Mechanism of Shield Tunnel Face in Complex Urban Geological Environment

Huang,

Han

2024

Buildings

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The construction of multiple tunnels across inland rivers has had a significant influence on the improvement of the transportation infrastructure. The technology for constructing tunnels is progressing towards the development of larger cross-sections, longer distances, and the ability to withstand high hydraulic pressure in complex hydrogeological conditions, including high-permeability strata. In order to ensure the face stability of shield tunnels under high hydraulic pressure that crosses a fault fracture zone, it is necessary to study the progressive failure mechanism of shield tunnel faces induced by high hydraulic pressure seepage. This paper employs finite element numerical simulation software to methodically examine the variation in the characteristics of the water seepage field, limiting support force, and face stability failure mode of shield tunnels passing through fault fracture zones with high hydraulic pressure under varying fault fracture width zones. The results show that the formation hydraulic gradient will progressively widen when the tunnel face is located within the undisturbed rock mass and is advanced towards the area of fault fracture. This will raise the likelihood of instability in the shield tunnel and progressively raise the limiting support force on the tunnel face. Moreover, as the tunnel face nears the region of fault fracture within the undisturbed rock mass, the damage range increases gradually. In addition, due to the increase in seepage force, the angle between the failure area and the horizontal plane becomes more and more gentle. On the contrary, as the tunnel’s face moves closer to the undisturbed rock mass from the region of the fault fracture, the damage range gradually decreases, and the dip angle between the damage area and the horizontal plane becomes steeper and steeper due to the decreasing seepage force in the process. The study findings presented in this work are highly significant, both theoretically and practically, for the design and management of safety.

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Section: Introductionmentioning

confidence: 99%

Progressive Failure Mechanism of Shield Tunnel Face in Complex Urban Geological Environment

Huang,

Han

2024

Buildings

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“…In terms of grouting control, with the widespread of computer technology, researchers are committed to the computerization of "three-under" mining subsidence prediction and grouting control [19][20][21][22][23][24][25][26][27][28][29] . The underground mined-out area of the Taijia Expressway was divided into three geological forms by Liu 30 : surrounding rock slump accumulation area, coal pillar and cavity.…”

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confidence: 99%

Analysis of the response subsidence and grouting treatment in the goaf of multi-layer inclined coal seam

Gao,

Tian,

Pang

et al. 2023

Sci Rep

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Based on existing researches, field drillings and numerical simulations are carried out in this paper to analyze the problems of subsidence control in the goaf of multi-layer inclined coal seam. Midas/GTS NX is used to build a three-dimensional calculation model of the goaf. A new method of using borehole data to check simulation parameters is proposed. The whole process of goaf excavation, construction of roadbed (pile foundation) and grouting treatment is analyzed. Analysis theory of different subgrade construction schemes and grouting treatment process on goaf is established. Response characteristics of displacement and equivalent stress and strain of goaf in multilayer inclined coal seam are obtained. A new method for analyzing the characteristics of the stress and deformation of the rock strata before and after grouting in the goaf under the conditions of different foundation schemes on the surface is provided in this research.

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Study on stress distribution law of surrounding rock of roadway under the goaf and mechanism of pressure relief and impact reduction

Zhang,

Han

et al. 2024

Engineering Failure Analysis

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Stability analysis of tunnel under coal seam goaf: Numerical and physical modeling

Cited by 7 publications

References 45 publications

Progressive Failure Mechanism of Shield Tunnel Face in Complex Urban Geological Environment

Progressive Failure Mechanism of Shield Tunnel Face in Complex Urban Geological Environment

Analysis of the response subsidence and grouting treatment in the goaf of multi-layer inclined coal seam

Study on stress distribution law of surrounding rock of roadway under the goaf and mechanism of pressure relief and impact reduction

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