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Article
Time-dependent failure characteristics of natural jointed granite of deep tunnel under different dip angles conditions
To investigate the time-dependent characteristics of jointed rock masses, a series of single-step true triaxial creep tests were conducted on natural jointed granite samples under different dip angles conditio...
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Article
Study on Warning Method for Fault Rockburst in Deep TBM Tunnels
Fault rockburst warning has always been challenging in deep tunnel engineering, and there is no quantitative warning method for deep tunnel boring machine (TBM) tunnels. This study clarified the geological cha...
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Article
The Floor Heave Mechanism of a Deep Clastic Rock Tunnel in Southwest China: An Experimental Study Based on Excavation Stress Paths
Excavation in deep weak rock engineering can significantly alter the stress state in the surrounding rock, often leading to varying degrees of floor heave. The excavation stress paths from the immediate floor ...
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Article
Influence of excavation stress paths on failure feature of deep hard rocks
The fracture of the surrounding rock in deep hard rock engineering is influenced by the stress path during excavation. Taking the stress path as the only variable, a true triaxial experimental system was used ...
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Article
Effect of lateral stress on shear strength of jointed hard rocks in true triaxial single-shear test
Shear failure along joints is one of the typical failure modes in deep underground rock masses, and indoor direct shear tests are commonly used to study the shear mechanical behavior of joints. However, deep u...
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Article
Excavation Stress Path Induced Fracturing Mechanism of Hard Rock in Deep Tunnel
Excavation of deep hard rock tunnels disturbs the initial stress imbalance, which can lead to rockburst, spalling and/or collapse. The disasters are related not only to the strength of the rock mass, but also ...
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Article
Time-dependent failure characteristics of excavated rock masses in deep buried engineering: a field case and experimental study
After engineering excavation, high axial stress makes hard rock to also have significant rheological behaviors that can lead to long-term instability. In order to study the long-term mechanical characteristics...
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Article
A Novel 3D Printing Technology for Synthetic Hard Rock and the Fabrication of **** Marble
This paper presents a novel 3D printing technology for synthetic hard rock based on self-developed 3D printing equipment and a systematic 3D printing method. The 3D printing equipment adopts a wet-material ext...
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Article
Experimental Study of the Mechanical Characteristics of **** Marble Under Multi-stage True Triaxial Compression Testing
Because true triaxial compression testing is generally more complicated, time-consuming, and expensive than conventional triaxial compression testing, further research is needed to reduce the cost and time of ...
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Article
Evaluation of the Crack Propagation Capacity of Hard Rock Based on Stress-Induced Deformation Anisotropy and the Propagation Angle of Volumetric Strain
The occurrence of various types of disasters in deep underground engineering is related not only to the strength of the rock mass but also to the crack propagation capacity (CPC) under corresponding stress con...
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Article
Experimental Study on the Failure Characteristics of Granite Subjected to Weak Dynamic Disturbance Under Different σ3 Conditions
During underground excavation, rocks are generally subjected to weak dynamic disturbances caused by blasting, machine vibration, rockburst. To investigate the failure characteristics of hard rock subjected to ...
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Article
Modelling three-dimensional stress-dependent failure of hard rocks
Hard rocks exhibit three-dimensional (3D) stress-dependent failure under true triaxial compression. The deformability and strength of hard rocks under true triaxial compression differ from those under traditio...
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Article
Co-blending based tribasic PEO-PS-PMMA gel polymer electrolyte for quasi-solid-state lithium metal batteries
A novel polymer film is developed by trap** tribasic gel polymer electrolyte (GPE), which blended the polyethylene glycol (PEO), polystyrene (PS), and poly(methyl methacrylate) (PMMA). The properties of the ...
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Article
Study on Time-Dependent Fracturing Behaviour for Three Different Hard Rock Under High True Triaxial Stress
True triaxial short-term and long-term tests were conducted on three different types of hard rocks, namely, marble, basalt and granite. During true triaxial long-term creep tests, the crack evolution informati...
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Article
Evaluation Method of Rock Brittleness under True Triaxial Stress States Based on Pre-peak Deformation Characteristic and Post-peak Energy Evolution
Deep rock masses are in true triaxial stress (TTS) fields, and few studies have examined the brittleness evaluation of rock under TTS thus far. In particular, research has not been conducted on the brittleness...
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Article
Influence of Loading and Unloading Stress Paths on the Deformation and Failure Features of **** Marble Under True Triaxial Compression
To study the difference in the failures of laboratories #7 and #8 of the China **** Underground Laboratory Phase II (CJPL-II), different loading and unloading stress path tests were carried out under a true...
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Article
A Three-Dimensional Failure Criterion for Hard Rocks Under True Triaxial Compression
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Article
A Novel Application of Strain Energy for Fracturing Process Analysis of Hard Rock Under True Triaxial Compression
Energy principles, which can favorably explain the complete rock failure process, are one of the most reliable analysis approaches in rock mechanics and engineering. In this study, a strain energy approach und...
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Article
Experimental Study of Failure Differences in Hard Rock Under True Triaxial Compression
In view of a previous study of the intermediate principal stress effect at a limited σ2 range, a series of true triaxial tests, covering a full range of intermediate principal stresses that vary from the generali...
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Article
Convenient preparation of nitrogen-doped activated carbon from Macadamia nutshell and its application in supercapacitor
Nitrogen-doped activated carbon has been successfully prepared via a convenient buried-type chemical activation technology, by using Macadamia nutshell as carbon source, melamine as nitrogen source and KOH as ...
