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Investigation of the rock failure effect on overcoring stress relief test in deep hard rock
The failure of a rock core will result in the inaccuracy of in situ stress tests when the overcoring stress relief method is used in deep rock...
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Performance Study of Hard Rock Cantilever Roadheader Based on PCA and DBN
With the wide application of cantilever roadheader in urban subway tunnel construction, accurate prediction of excavation performance of cantilever...
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A New Prediction Model for Cutting Depth of Hard Rock Using High-Pressure Water Jets
High-pressure pure water jet has been widely used in breaking soft rocks and medium–hard rocks, but its research on cutting hard rocks is very...
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Deformation characteristics and damage ontologies of soft and hard composite rock masses under impact loading
As one of the most common occurring geological landforms in deep rock formations, the dynamic mechanical properties of layered composite rock bodies...
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Tunnelling performance prediction of cantilever boring machine in sedimentary hard-rock tunnel using deep belief network
Evaluating the adaptability of cantilever boring machine (CBM) through in-depth excavation and analysis of tunnel excavation data and rock mass...
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A Hybrid Methodology of Rock Support Design for Poor Ground Conditions in Hard Rock Tunnelling
The design of rock support in hard rock tunnelling is often assisted by the use of empirical engineering rock mass classification systems. This has...
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A sound-based machine learning method for crack-type recognition in hard rock
The recognition of tensile and shear cracks during hard rock cracking is critical for early warning of rockbursts in deep rock engineering. However,...
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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...
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Experimental Study on the Performance and Mechanism of High-Pressure Abrasive Waterjet Cutting Hard Rock
In order to improve the performance of high-pressure abrasive water jet cutting extremely hard rock, research on the cutting effect and mechanism of...
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Stress-rate dependency of uniaxial compressive strength of hard rock with regard to test procedure standards
The uniaxial compressive strength test of hard rock is one of the most worldwide applied tests for characterization of hard rock in rock engineering...
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Anisotropic creep behavior of soft-hard interbedded rock masses based on 3D printing and digital imaging correlation technology
Three-dimensional (3D) printing technology is increasingly used in experimental research of geotechnical engineering. Compared to other materials, 3D...
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Geophysical estimation of 2D hydraulic conductivity for groundwater assessment in hard rock
Accurate evaluation of aquifer potential is essential for groundwater assessments. Aquifer potential is mainly evaluated by aquifer parameters....
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Dynamic Strength and Indentation Hardness of a Hard Rock Treated by Microwave and the Influence on Excavation Rate
Mechanical excavation in hard or very hard rocks is still challenging in rock engineering. One plausible solution is to reduce rock strength prior to...
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Performance Predictions of Hard Rock TBM in Subcritical Cutter Load Conditions
In mechanized tunneling, the ability to accurately predict the performance of the tunnel boring machine (TBM) is critical, because of its impacts on...
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Rockburst Prediction and Evaluation Model for Hard Rock Engineering Based on Extreme Gradient Boosting Ensemble Learning and SHAP Value
Rockburst prediction is the basis of rockburst prevention and construction guidance. However, the complexity of the rock burst occurrence mechanism...
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A comparative analysis of hybrid RF models for efficient lithology prediction in hard rock tunneling using TBM working parameters
With the escalating demand for underground mining and infrastructure construction, the optimization of tunnel construction has emerged as a primary...
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Behavior and stability of engineering bedding rock slope during construction
The construction of the bedding rock slope of AK3 + 690 to AK3 + 888 in Tonghuang Expressway began on November 23, 2003. After cracks appeared at the...
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A Test System for Microwave-Assisted Dual-Mode Mechanical Cutting of Hard Rock Under True Triaxial Compression
This paper introduces a test system for microwave-assisted dual-mode mechanical cutting of hard rock under true triaxial compression. The test system...
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The Influence of the Rotary Speed of a Microwave Applicator on Hard-Rock Fracturing Effect
Microwave-induced hard rock fracturing technology has potential application prospects in tunnel boring machine (TBM) hard tunnel excavation. It is of...
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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...
