A stress–seepage–damage coupling model considering the long-term creep of a deep rock mass was established to study the mechanism of evolution of stability of the surrounding rock during reconstruction and excavation of abandoned deep water-rich roadways in a mine. The research shows that the maximum compressive stress in a circular cavern is significantly lower than that in a horseshoe-shaped cavern. Stress is distributed more uniformly in the circular cavern, and appropriately enlarging the size of the reconstructed excavation site can improve the stability of the surrounding rock. As the creep duration for abandoned roadways increases from 1 to 9 years, the growth rates for vault settlement and horizontal clearance convergence remain constant and the roadway undergoes steady-state creep. With increasing burial depth of the abandoned roadway (200–400 m), a pressure arch is gradually formed in the roadway roof in the reconstruction and mining process. The surrounding rock forms a ‘self-bearing structure’ with arch mechanical characteristics and a load transfer mechanism to maintain its own stability, and the overall bearing capacity of the surrounding rock is greatly improved. However, once the burial depth exceeds 400 m, the effect of the pressure arch begins to diminish with further increases in burial depth. Furthermore, porewater pressure significantly weakens the surrounding rocks.
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Research Article|
August 01, 2024
Coupling effects of stress, seepage and damage during reconstruction and excavation of abandoned deep water-rich roadways
Yunchen Deng;
Yunchen Deng
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
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Yi Luo;
Yi Luo
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
3
Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology
, Wuhan 430070, China
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Dengxing Qu;
Dengxing Qu
*
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
*
Correspondence: [email protected]
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Xuan Zhang;
Xuan Zhang
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
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Xin Liu;
Xin Liu
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
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Han Luo;
Han Luo
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
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Xinping Li
Xinping Li
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
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Yunchen Deng
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
Yi Luo
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
3
Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology
, Wuhan 430070, China
Dengxing Qu
*
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
Xuan Zhang
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
Xin Liu
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
Han Luo
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
Xinping Li
1
School of Civil Engineering and Architecture, Wuhan University of Technology
, Wuhan 430070, China
2
Sanya Science and Education Innovation Park, Wuhan University of Technology
, Sanya 572024, China
*
Correspondence: [email protected]
Publisher: Geological Society of London
Received:
18 Jan 2024
Revision Received:
09 May 2024
Accepted:
27 May 2024
First Online:
13 Jun 2024
Online ISSN: 2041-4803
Print ISSN: 1470-9236
- Funder(s):National Natural Science Foundation of China
- Award Id(s): 51979208
- Award Id(s):
- Funder(s):Hubei Provincial Key Laboratory of Green Materials for Light Industry
- Award Id(s): 2020CFA102
- Award Id(s):
- Funder(s):Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City
- Award Id(s): 2021JJLH0068
- Award Id(s):
© 2024 The Author(s). Published by The Geological Society of London. All rights reserved
© 2024 The Author(s)
Quarterly Journal of Engineering Geology and Hydrogeology (2024) 57 (3): qjegh2024-014.
Article history
Received:
18 Jan 2024
Revision Received:
09 May 2024
Accepted:
27 May 2024
First Online:
13 Jun 2024
Citation
Yunchen Deng, Yi Luo, Dengxing Qu, Xuan Zhang, Xin Liu, Han Luo, Xinping Li; Coupling effects of stress, seepage and damage during reconstruction and excavation of abandoned deep water-rich roadways. Quarterly Journal of Engineering Geology and Hydrogeology 2024;; 57 (3): qjegh2024–014. doi: https://doi.org/10.1144/qjegh2024-014
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