Discrete Element Modelling of the Influence of Reinforcement in Structurally Controlled Squeezing Mechanisms in a Hard Rock Mine

Karampinos, Efstratios; Hadjigeorgiou, John; Turcotte, Pascal

doi:10.1007/s00603-016-1080-3

Cited by 27 publications

(17 citation statements)

References 19 publications

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“…Its use as a secondary support strategy has been justified by reducing, significantly, the required rehabilitation under squeezing conditions (Turcotte 2010). Karampinos et al (2016) expanded on the 3D distinct element model that captured the buckling mechanism at LaRonde by introducing reinforcement elements. The performance of reinforcement was simulated explicitly using global reinforcement elements (Itasca Consulting Group Inc 2013).…”

Section: Modelling the Role Of Reinforcementmentioning

confidence: 99%

Design tools for squeezing ground conditions in hard rock mines

Hadjigeorgiou¹,

Karampinos²

2017

Proceedings of the International Conference on Deep and High Stress Mining

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Squeezing ground conditions are encountered in several underground rock mines. This paper addresses the selection of appropriate engineering tools that can be used for the prediction of squeezing and investigates the relative performance of different ground support options. A clear distinction is made between squeezing as a result of weak rock or shear failure and structurally defined buckling failure of the rock mass. A critical assessment is made of available empirical tools with particular emphasis on their limitations. The second part of the paper addresses issues with the use of numerical models and, in particular, the choice of numerical models that capture the prevalent mechanisms. A case study is presented whereby different reinforcement elements are used to control large deformations in mining drives. The paper provides a path forward to assessing the potential performance of new reinforcement elements at the same mine site.

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Section: Modelling the Role Of Reinforcementmentioning

confidence: 99%

Design tools for squeezing ground conditions in hard rock mines

Hadjigeorgiou¹,

Karampinos²

2017

Proceedings of the International Conference on Deep and High Stress Mining

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“…It was assumed that the nodal points could not slide, while the elements between the nodes could stretch. When the bolt reaches its axial capacity, plastic deformation occurs and the bolt ruptures when the strain limit is reached (Karampinos, Hadjigeorgiou, and Turcotte, 2016). The buckling mechanism at LaRonde has been described by several authors (Potvin and Hadjigeorgiou, 2008;Mercier-Langevin and Wilson, 2013;.…”

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confidence: 96%

“…Explicit representation of rock reinforcement in 3D DEM models for foliated ground and time limitations often do not allow for 3D modelling, and so techniques have been developed to account for the impact of tunnel advance in both pseudo-3D and 2D modelling approaches, such as the pressure reduction or face destressing methods (Vlachopoulos and Diederichs, 2014). Previous work presented by Karampinos, Hadjigeorgiou, and Turcotte (2016) used the pressure reduction method in 3DEC to capture the impact of tunnel advance on the effectiveness of reinforcement in managing structurally controlled deformations at the LaRonde mine.…”

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confidence: 99%

“…The mechanical behaviour of reinforcement elements can be modelled in a 3D DEM, such as 3DEC, using structural elements. Global reinforcement elements can be used successfully to simulate the performance of the different bolts used at LaRonde (Karampinos, Hadjigeorgiou, and Turcotte, 2016). These elements are assumed to be divided into a number of segments.…”

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confidence: 99%

“…Figure 3b shows the significant reduction of the purging distance after the introduction of the hybrid bolt and straps as a secondary support strategy. This distance was defined as the length of the drift sections requiring purging of the walls in a direction parallel to the direction of mining (Karampinos, Hadjigeorgiou, and Turcotte, 2016).…”

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See 2 more Smart Citations

Explicit representation of rock reinforcement in 3D DEM models for foliated ground

Karampinos¹,

Hadjigeorgiou²,

Pierce³

2018

J. S. Afr. Inst. Min. Metall.

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Research on the failure process and stability control technology in a deep roadway: Numerical simulation and field test

Zang

Chen

Zhang

et al. 2020

Energy Science & Engineering

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With the increase in mining depth and the deterioration of surrounding rock conditions, large deformation failure of deep roadway surrounding rock is still very common. To solve the support problem, it is necessary to understand the deformation and failure mechanism of the deep roadway. This paper presents a case study on the deformation failure behavior and support design of a deep roadway in the Tangyang mine by field tests and numerical simulations. The rock mass properties were first evaluated based on field data and the mechanical parameters of rock specimens. Then, the numerical model of the deep roadway surrounding rock was established based on the calibrated microparameters. The deformation features and cracking behavior of the roadway were investigated in detail. The results show that the cracking process of crack initiation, crack propagation, and rock separation in the surrounding rock of this kind of roadway is a gradual process developing from a shallow to deep depth. A combined support “bolt‐cable‐mesh‐steel ladder” was proposed based on the failure characteristics of the roadway. Finally, a numerical simulation and field experiment were conducted to evaluate the rationality of the proposed support scheme, and the results show that the new support method can effectively control the surrounding rock. This study can provide valuable references for support design in deep underground engineering.

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Discrete Element Modelling of the Influence of Reinforcement in Structurally Controlled Squeezing Mechanisms in a Hard Rock Mine

Cited by 27 publications

References 19 publications

Design tools for squeezing ground conditions in hard rock mines

Design tools for squeezing ground conditions in hard rock mines

Explicit representation of rock reinforcement in 3D DEM models for foliated ground

Research on the failure process and stability control technology in a deep roadway: Numerical simulation and field test

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