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Temperature effect of rock burst for hard rock in deep-buried tunnel
Natural Hazards, 2014Much research has been conducted on the influence of rock burst mechanisms and temperature on the mechanical properties of hard rock while research on the effect of temperature on rock bursts is scarce. Therefore, this paper focuses on Rock Burst Proneness Index tests and acoustic emission (AE) tests under the action of high temperature.
Guoqing Chen +4 more
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Blasting Vibration Study of a Deep Buried Tunnel Entrance
2018Taking the Luo-Sha tunnel as the research site, we monitored the blasting vibration in a tunnel portal and performed time-frequency analysis on the monitoring data. During the time domain analysis, the maximum horizontal radial component of the blasting vibration velocity is greater than the maximum horizontal tangential component, and the maximum ...
Jiang-Bo Xu, Chang-Gen Yan, Hang Yuan
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The Effect of Model Scope on Numerical Results for Deep-Buried Tunnel
Tunneling and Underground Construction, 2014The numerical simulation method has become one of the most important assistant approaches for engineering design. But for the model scope of the overlying strata of deep-buried tunnel, there's no consensus which could be accepted by the whole geotechnical engineering industry; and, in most cases, the boundary of the model is determined by experience ...
Naifei Liu +3 more
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The external water pressure on a deep buried tunnel in fractured rock
Tunnelling and Underground Space Technology, 2015Abstract Underground tunnels are increasingly built at greater burial depths for water conservancy and hydropower projects. The safety of these tunnels is threatened by high external water pressure during construction and reservoir operations. In this research, external water pressure was considered to be a relative incremental water pressure ...
Yong Huang +4 more
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The Forecasting of Rockburst in Deep-buried Tunnel with Adaptive Neural Network
2009 International Conference on Industrial and Information Systems, 2009Taking into account internal and exterior factors of rockburst, a model using BP neural network is proposed, in which the in-situ stress, the compressive strength, the tensile strength and the elastic energy index of the cavern are chosen as criteria indexes.
Zheng Xuan, Bu Xuhui
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Experimental study on similarity materials for soft rock of deep-buried tunnels
Journal of Coal Science and Engineering (China), 2011When every parameter is properly scaled down in accordance with some similarity coefficients, it is possible to study the physical-mechanical properties of rock mass with a scale model. To identify the key mechanisms of soft rock in deep buried tunnels, the proper sand, binder and ratio were selected.
Yu Zhao, Hai-you Peng
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Artificial Neural Network for Prediction of Rockburst in Deep-Buried Long Tunnel
2005Rockburst is a main engineering geological problems in deep-buried long tunnels. Rockburst phenomena have been analyzed, assumptions and criteria have been presented from the perspectives of strength, stiffness, energy, steadiness, fracture, damage, fractal and catastrophe, etc.
Xiaohong Li +3 more
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Numerical Analysis of Faults on Deep-Buried Tunnel Surrounding Rock Damaged Zones
Applied Mechanics and Materials, 2011Fault is one of the most important factors affecting tunnel instability. As a significant and casual construction of Jinping II hydropower station, when the drain tunnel is excavated at depth of 1600 m, rockbursts and water inrush induced by several huge faults and zone of fracture have restricted the development of the whole construction.
Jun Hu, Ling Xu, Nu Wen Xu
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Analysis of stress evolution characteristics during TBM excavation in deep buried tunnels
Bulletin of Engineering Geology and the Environment, 2019Full-face tunnel boring machines (TBMs) are widely used in tunnel engineering projects as an efficient, safe and economical tunneling method. However, TBM excavation causes stress near the tunnel boundary that is disturbed and redistributed under high in situ stress.
Yue Jiang +5 more
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SEG Technical Program Expanded Abstracts 2010, 2010
High-speed railway are boosting in China and many railway routes have to go though mountainous area which has complex geotectonic setting. Mapping the deep buried long railway tunnel comes to prove difficulty in the railway route investigation. A successful case history of applying the highfrequency electromagnetic (HFEM) method to investigate ...
Li Zhihua, He Lanfang
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High-speed railway are boosting in China and many railway routes have to go though mountainous area which has complex geotectonic setting. Mapping the deep buried long railway tunnel comes to prove difficulty in the railway route investigation. A successful case history of applying the highfrequency electromagnetic (HFEM) method to investigate ...
Li Zhihua, He Lanfang
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