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Geomechanics and Engineering Volume 21, Number 6, June25 2020 , pages 551-564 DOI: https://doi.org/10.12989/gae.2020.21.6.551 |
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Ground support performance in deep underground mine with large anisotropic deformation using calibrated numerical simulation (case of mine-H) |
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Bo Hu, Mostafa Sharifzadeh, Xia-Ting Feng, Roo Talebi and Jin-Fu Lou
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| Abstract | ||
| High-stress and complex geological conditions impose great challenges to maintain excavation stability during deep underground mining. In this research, large anisotropic deformation and its management by support system at a deep underground mine in Western Australia were simulated through three-dimensional finite-difference model. The ubiquitous-joint model was used and calibrated in FLAC3D to reproduce the deformation and failure characteristics of the excavation based on the field monitoring results. After modeling verification, the roles of mining depth also the intercept angle between excavation axis and foliation orientation on the deformation and damage were studied. Based on the results, quantitative relationships between key factors and damage classifications were presented, which can be used as an engineering tool. Subsequently, the performance of support system installation sequences was simulated and compared at four different scenarios. The results show that, first surface support and then reinforcement installation can obtain a better controlling effect. Finally, the influence of bolt spacing and ring spacing were also discussed. The outcomes obtained in this research may play a meaningful reference for facing the challenges in thin-bedded or foliated ground conditions. | ||
| Key Words | ||
| large deformation; squeezing, intercept angle; ground reinforcement; ubiquitous-joint model; support standard | ||
| Address | ||
| Bo Hu: 1.) School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China 2.) Inner Mongolia Key Laboratory of Mining Pressure and Strata Control, Hulunbeir University, Hulunbeir 021008, China Mostafa Sharifzadeh: 1.) Department of Mining Engineering, Western Australian School of Mines, Curtin University,Kalgoorlie 6430, Australia 2.) Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China Xia-Ting Feng: Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China Roo Talebi: Northern Star Resources Ltd, Kalgoorlie WA 6430, Australia Jin-Fu Lou: Mining and Designing Branch, China Coal Research Institute, Beijing, China | ||