Journal ArticleDOI
Experimental investigation of failure process and characteristics in circular tunnels under different stress states and internal unloading conditions
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In this paper , the authors investigated the failure process and evolution mechanisms in circular tunnels under a complex stress path of deep in-situ stress + excavation unloading + stress adjustment using a simulation test based on loading first and then drilling (LFTD) mode.About:
This article is published in International Journal of Rock Mechanics and Mining Sciences.The article was published on 2022-06-01. It has received 16 citations till now. The article focuses on the topics: Stress (linguistics) & Failure mode and effects analysis.read more
Citations
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A Novel Staged Cyclic Damage Constitutive Model for Brittle Rock Based on Linear Energy Dissipation Law: Modelling and Validation
Journal ArticleDOI
Experimental investigation on rockburst process and characteristics of a circular opening in layered rock under three-dimensional stress conditions
TL;DR: In this paper , the authors investigated the influence of the bedding angle on the failure process and characteristics of circular hole sidewalls, and true-triaxial lab tests were conducted on cubic phyllite specimens with different bedding angles.
Journal ArticleDOI
Evaluation of energy storage and release potentials of highly stressed rock pillar from rockburst control perspectives
Songzhu Luo,Fengqiang Gong +1 more
TL;DR: In this paper , a method for estimating the desired number of energy-absorbing bolts during rockburst support in engineering practice was proposed. But the method is limited to a single-cyclic loading-unloading uniaxial compression test with different stress levels.
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Influence of maximum principal stress direction on the failure process and characteristics of D-shaped tunnels
TL;DR: In this paper , the failure process of D-shaped tunnels under different maximum principal stress directions was investigated, and the failure severities at different stress directions can be ranked from high to low in the following order: 90°>60°>30°>45°>0°.
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Failure process and characteristics of three-dimensional high-stress circular tunnel under saturated water content
TL;DR: In this article , a true-triaxial testing system was used to investigate the influence of saturated water content (SWC) on the failure process and characteristics of a circular tunnel of surrounding rocks.
References
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Journal ArticleDOI
The 2003 Canadian Geotechnical Colloquium: Mechanistic interpretation and practical application of damage and spalling prediction criteria for deep tunnelling
TL;DR: In this article, the authors used analytical and micromechanical tools to validate a simple empirical predictive model for tunnel spall initiation in hard-rock and granitoid or gneissic ground.
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Rockburst mechanisms in tunnels and shafts
W.D. Ortlepp,T.R. Stacey +1 more
TL;DR: In this article, several different mechanisms of rockbursting are distinguished, and a clear distinction is drawn between source and damage mechanisms where appropriate, brief case studies of the different mechanisms are given.
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Design of rock support system under rockburst condition
Peter K. Kaiser,Ming Cai +1 more
TL;DR: In this paper, an interactive tool for conducting rockburst support design in underground tunnels is introduced to facilitate cost-effective design, and the support selection process in burst-prone ground is iterative, requiring design verification and modification based on field observations.
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20 years of excavation response studies at AECL's Underground Research Laboratory
TL;DR: The Thermal-Mechanical Stability Study (TMSS) at the AECL Underground Research Laboratory (URL) as discussed by the authors is a comprehensive study to link characterization, numerical modeling, monitoring, and design of underground excavations.
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Failure mechanism and coupled static-dynamic loading theory in deep hard rock mining: A review
TL;DR: In this article, a new theory and testing method for deep underground rock mass under coupled static-dynamic loading are introduced, and the results of true triaxial unloading compression tests on granite and red sandstone indicate that the unloading can induce slabbing when the confining pressure exceeds a certain threshold and the slabbing failure strength is lower than the shear failure strength according to the conventional MohrColumn criterion.