The effect of weak interlayer on the failure pattern of rock mass around tunnel – Scaled model tests and numerical analysis

Feng, Huang; Zhu, Hehua; Xu, Qingyang; Cai, Yongchang; Zhuang, Xiaoying

doi:10.1016/j.tust.2012.06.014

Cited by 205 publications

(44 citation statements)

References 28 publications

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“…Such discontinuities can aggravate stress concentration and strength degradation, thus resulting in different patterns of rock mass failure around the opening compared with the patterns observed in isotropic rock masses. According to the number of discontinuities considered, related analytical models can be classified into three main categories, namely: a 'one-joint' model [10][11][12][13]; a 'single set of joints' model [8,[14][15][16][17][18]; and a 'multiple set of joints' model [19][20][21][22]. The 'one-joint' model is particularly used to investigate the effect of a fault, which is a large geological discontinuity, on the deformation and failure behavior of an underground opening.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

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Section: Introductionmentioning

confidence: 99%

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

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“…To more accurately reflect the actual mining environment, this article performs a laboratory similar-material simulation experiment to research the surrounding rock deformation mechanism of fully mechanized gangue backfilling GER [26][27][28]. As the existing test device cannot simulate the horizontal pushing load, the current study designed a backfilling mining GER test system that can push-press horizontally ( Figure 4).…”

Section: Design Of Test Systemmentioning

confidence: 99%

Surrounding Rock Deformation Mechanism and Control Technology for Gob-Side Entry Retaining with Fully Mechanized Gangue Backfilling Mining: A Case Study

Gong

Zhang

et al. 2017

Shock and Vibration

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To counter the technical difficulties faced by gob-side entry retaining (GER) under multiple complex mining geological conditions in China, this paper introduces a GER method with fully mechanized gangue backfilling mining. A similar materials simulation experiment was conducted to simulate the gob-backfilled GER process by using the similar model test system containing an independently developed horizontal pushing load device. The experimental results show that the compaction speed of the backfilling area (BFA) can be improved, and the main roof subsidence can be reduced by increasing the horizontal pushing load and reducing the attenuation rate of the stress in BFA. The designed roadside backfill body (RBB) containing a flexible cushion is adaptive to the given deformation of the main roof, thus reducing the stress concentration of the RBB. The field test results show that when a 2 MPa horizontal pushing load is exerted in the BFA, arranging a 200 mm high-water-material flexible cushion can cause the BFA to swiftly change to the compaction stage. After stabilized deformation, the roadway section satisfies the design and application requirements. The feasibility and rationality of the GER with the fully mechanized gangue backfilling mining are proved, providing a safe, efficient, and environmentally friendly mining method without using a coal pillar.

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“…Zhu et al [22] studied the interaction between different caverns of Shuangjiangkou hydropower station during excavation through model testing. In order to investigate the influence to the failure mode of surrounding rocks caused by the weak intercalated layer, Huang et al [23] simulated the tunnel excavation through model testing. The test reveals that the weak intercalated layer influences the tunnel stability by increasing the destruction belts and causing the asymmetrical stress distributions.…”

Section: Introductionmentioning

confidence: 99%

Physical and Numerical Modeling of the Stability of Deep Caverns in Tahe Oil Field in China

2017

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Cave collapses emerge during the process of oil reservoir development, seriously affecting oil production. To reveal the collapse and failure mechanism of the carbonate cavern with a buried depth of 5600 m in Tahe Oil Field, using a self-developed ultra-high pressure model test system with the intelligent numerical control function, the model simulation material of carbonate rocks developed to carry out the 3D geo-mechanical model test. The model test and numerical results indicate that: (1) collapse and failure mechanism of the deep-buried caves mainly involve the failure mode of tensile shear. The rupture plane on the side wall is approximately parallel to the direction of maximum principal compressive stress. The V-type tension and split rupture plane then emerges. (2) In the process of forming holes in the model caverns, micro cracks are generated at the foot of the left and right side walls of the caverns, and the roof panels are constantly moving downward. The shorter the distance to the cave wall, the severer the destructiveness of the surrounding rocks will be. (3) The displacement of the top of the model cavern is relatively large and uniform, indicating that the cave roof moves downward as a whole. The area of the cavity suffering damage is 2.3 times as large as the cave span. The research results in this paper lay a solid test basis for revealing the cave collapse and failure mechanism in super depth.

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The effect of weak interlayer on the failure pattern of rock mass around tunnel – Scaled model tests and numerical analysis

Cited by 205 publications

References 28 publications

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Surrounding Rock Deformation Mechanism and Control Technology for Gob-Side Entry Retaining with Fully Mechanized Gangue Backfilling Mining: A Case Study

Physical and Numerical Modeling of the Stability of Deep Caverns in Tahe Oil Field in China

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