Model test on deformation and failure mechanism of tunnel support with layered rock mass under high ground stress

Zhang, Bo; Tao, Zhigang; Guo, Pengfei; Yang, Kang; Yang, Yi

doi:10.1016/j.engfailanal.2023.107296

Cited by 22 publications

(2 citation statements)

References 31 publications

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“…Numerous researchers have studied tunnels' deformation and mechanical properties in layered surrounding rock with high ground stress, mainly using model tests [10][11][12][13][14][15][16] and numerical simulations [17][18][19][20][21]. These methods are effective for investigating tunnels in layered surrounding rock because they have high repeatability, are low cost, and are less time-consuming [22].…”

Section: Introductionmentioning

confidence: 99%

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

Zhang,

Hu,

et al. 2024

Buildings

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Tunnels excavated in a combination of hard and soft rock strata with high ground stress are prone to large deformations, collapse, and other disasters. The Yongfeng Tunnel, a reconstruction and expansion of the G544 line, suffered severe high ground stress from plate compression. This paper studied the surrounding rock pressure and supporting structure stress characteristics of tunnels with a combination of hard and soft rock strata with high ground stress by using earth pressure cells, surface strain gauges, and embedded strain gauges to test all stress related to the surrounding rock, primary support, and secondary lining. It was found that the contact pressure (P1) between the initial support and the surrounding rock and the contact pressure (P2) between the initial support of the leading tunnel were distributed in the direction of vertical stratification, while the contact pressures (P1 and P2) of the lagging tunnel were different due to the excavation unloading of the leading tunnel. The maximum stress positions of the initial support of the leading tunnel and the lagging tunnel were located in the left arch waist and the vault, respectively. However, the maximum stress position of the secondary lining was generally located on the side wall. The research results presented herein can guide future tunnel construction projects.

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Section: Introductionmentioning

confidence: 99%

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

Zhang,

Hu,

et al. 2024

Buildings

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“…The coal-forming environment of steeply dipping coal seams is complex, and safe and efficient mining is tough. In recent years, many experts, scholars, and engineers have carried out research and exploration on the problems of mine pressure behavior law (Wang et al, 2022;Yang et al, 2021;Tu et al, 2017), distribution characteristics and spatial distribution of surrounding rock stress (Dai et al, 2006;Wei et al, 2021;Wang et al, 2020;Wu et al, 2020a), asymmetric deformation and failure movement law of roof and floor strata and rock mass structure (Wu et al, 2021;Luo et al, 2021Luo et al, , 2023Chi et al, 2021;Shi et al, 1993;, surface subsidence caused by coal seam mining (Yin et al, 2001;Xie et al, 2020), coupling mechanism, and stability control of "support-surrounding rock" system (Hao et al, 2021;Wang et al, 2017;Xie et al, 2020;Zhang et al, 2023;Zhao et al, 2022;Yang et al, 2020;Wang et al, 2018), sliding and toppling mechanism of support and equipment (Chi et al, 2020;Zhang et al, 2008;Yang et al, 2018) and possible surrounding rock disasters. It has promoted the continuous progress of the theory and technology of longwall mining in steeply dipping coal seams, and greatly improved the poor safety of mining in steeply dipping coal seams.…”

Section: Introductionmentioning

confidence: 99%

Study on roof breaking mechanism and support stability of steeply dipping seam and large mining height

Hu,

Xie,

Huang

et al. 2023

Energy Exploration & Exploitation

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Taking the steeply dipping and large mining height working face of a mine as the engineering background, through the combination of physical simulation experiment, numerical calculation, theoretical analysis and field monitoring, based on a comprehensive analysis of the deformation and failure characteristics of the macrostructure of surrounding rock, the roof breaking mechanism and support instability characteristics of large mining height working face under the angle effect are studied. The research shows that due to the influence of the dip angle of the coal seam, the roof stress is asymmetrically deflected along the tendency, and the load of the overlying strata is transmitted to the upper and lower coal bodies with the stress-deflection boundary as the boundary, resulting in the deformation and failure of the roof and the filling showing obvious asymmetric characteristics. With the increase of dip angle, the asymmetric characteristics of roof stress transfer are enhanced, the stress release arch is reduced, the height of caving zone is reduced, the deformation and failure area is gradually moved up, and the regional characteristics of roof loading and deformation and failure are more obvious, which leads to the significant increase of unbalanced loading degree and instability probability of supports in different areas. Combined with the actual production, the prevention and control measures of hard roof caving and support crushing in fully mechanized mining face with steeply dipping seam and large mining height are put forward.

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Train Vibration Dynamic Response of Tunnel Invert Under High Geo-Stress

Du,

Wang,

Liu

et al. 2024

Indian Geotech J

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Model test on deformation and failure mechanism of tunnel support with layered rock mass under high ground stress

Cited by 22 publications

References 31 publications

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

A Field Study to Measure the Surrounding Stress of Rock and Supporting Structure of a Steep Tunnel with a Combination of Hard and Soft Rock Layers under Plate Compression

Study on roof breaking mechanism and support stability of steeply dipping seam and large mining height

Train Vibration Dynamic Response of Tunnel Invert Under High Geo-Stress

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