Study on damage characteristics of iron ore under variable line density charge structure blasting
October 2024
Blasting test research was conducted on iron ore specimens with variable line density charging structures. Computer tomography (CT), digital image processing, and three-dimensional model reconstruction...
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Continuous-discontinuous analysis of bench blasting in open-pit mining: Influences of hole packing and caving holes
October 2024
Bench blasting is commonly used in open-pit mining. Some design parameters such as positions of hole packing and caving holes have great influences on the blasting effects. In this work, with a hybrid...
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Application of artificial intelligence in three aspects of landslide risk assessment: A comprehensive review
October 2024
Landslides are one of the geological disasters with wide distribution, high impact and serious damage around the world. Landslide risk assessment can help us know the risk of landslides occurring, which...
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Experimental study on failure mechanism of soft rock-coal bodies in abandoned mines under cyclic dynamic loading
October 2024
During the construction and operation of a pumped storage power station in an abandoned mine, the soft rock-coal body structure, comprising the roof and the residual coal pillars, encounters a complex...
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Viscoelastic plastic interaction of tunnel support and strain-softening rock mass considering longitudinal effect
October 2024
A simplified two-stage method was employed to provide an explicit solution for the time-dependent tunnel-rock interaction, considering the generalized Zhang-Zhu strength criterion. Additionally, a simplified...
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The effects of staggered and non-staggered joints on the ultimate bearing capacity, load settlement behavior, and failure mechanism with the change of excavation depths
Available online 5 September 2024
Extensive research is available on excavation walls in soils. However, very few studies address their performance in rocks and jointed rock masses. This study aimed to investigate the effect of staggered...
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Shear behavior and dilatancy of an artificial hard-matrix bimrock: An experimental study focusing on the role of blocky structure
Available online 1 September 2024
Bimrocks are characterized by their geotechnically significant blocky structure, presenting complex shear behavior. This study investigates the shear behavior and dilatancy of bimrocks featuring a rock-like...
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Modeling of particle migration in piping based on an improved discrete element method
Available online 1 September 2024
Pore-scale particle migration in piping is the main reason of the suffusion-induced damage, which poses a significant threat to earth-rock dams. In order to investigate the micro-mechanism of piping...
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Exploring Machine Learning Techniques for Open Stope Stability Prediction: A Comparative Study and Feature Importance Analysis
Available online 31 August 2024
The stability of underground excavations is essential for ensuring the safety of mining operations. Classical stability assessment methods, established in empirical formulas and rock mass classification...
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Effects of joint persistence and testing conditions on cyclic shear behavior of en-echelon joints under CNS conditions
Available online 31 August 2024
Cyclic shear tests on rock joints serve as a practical strategy for understanding the shear behavior of jointed rock masses under seismic conditions. We explored the cyclic shear behavior of en-echelon...
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Experimental behavior and fracture prediction of a novel high-strength and high-toughness steel subjected to tension and shear loading tests
Available online 30 August 2024
In this study, laboratory testing and numerical simulation methods are used to investigate the mechanical behavior and perform fracture prediction of a novel high-strength and high-toughness steel with...
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Discontinuous deformation analysis for subsidence of fractured formations under seepage: A case study
Available online 30 August 2024
With the growing prominence of recycling projects of groundwater, the attention towards subsidence concerns in geological formations is intensifying. However, due to the long evolutionary time and complex...
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Simultaneously improving ROP and maintaining wellbore stability in shale gas well: A case study of Luzhou shale gas reservoirs
July 2024
The ROP (rate of penetration) within the horizontal section of shale gas wells in the Luzhou oil field is low, seriously delaying the exploration and development process. It is proved that reducing...
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Two-phase flow thermo-hydro-mechanical modeling for a water flooding field case
July 2024
Simulation of subsurface energy system involves multi-physical processes such as thermal, hydraulical, and mechanical (THM) processes, and requires a so-called THM coupled modeling approach. THM coupled...
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Characterization and modeling of supercritical CO2 pulse pressures: Effects of activator mass and discharge plate thickness
July 2024
Utilizing a bespoke CO2 phase transition pulse pressure experimental system, we conducted pulse pressure characterization tests across various activator masses, CO2 filling pressures, and energy discharge...
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Rockburst prediction using artificial intelligence techniques: A review
July 2024
Rockburst is a phenomenon where sudden, catastrophic failure of the rock mass occurs in underground deep regions or areas with high tectonic stress during the excavation process. Rockburst disasters...
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Analyzing thermal maturity effect on shale organic matter via PeakForce quantitative nanomechanical mapping
July 2024
Organic-rich shales have gained significant attention in recent years due to their pivotal role in unconventional hydrocarbon production. These shale rocks undergo thermal maturation processes that...
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Identifying perforation locations for hydraulic fracturing treatment in deep and tight sandstone gas reservoirs
July 2024
Fracture initiation has been a challenging issue for fracturing deep and tight gas reservoirs, which generally requires a high breakdown pressure for hydraulic fracturing treatment. In this situation,...
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Analytical prediction for time-dependent interaction of a circular tunnel excavated in strain-softening rock mass
July 2024
Viscoelastic plastic solutions for tunnel excavation in strain-softening rock mass and tunnel-rock interaction are proposed based on the Mohr-Coulomb and the Generalized Zhang-Zhu (GZZ) strength criterion...
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Introducing a new rock abrasivity index using a scaled down disc cutter
July 2024
Rock abrasivity influences wear of cutting tools and consequently, performance of mechanized tunneling machines. Several methods have been proposed to evaluate rock abrasivity in recent decades, each...
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A coarse-grained bonded particle model for large-scale rock simulation
Available online 31 May 2024
For solving the computationally intensive problem encountered by the discrete element method (DEM) in simulating large-scale engineering problems, it is essential to establish a numerical model that...
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Experimental investigation on acoustic emission precursor of rockburst based on unsupervised machine learning method
April 2024
The key to achieving rockburst warning lies in the understanding of rockburst precursors. Considering the correlation characteristics of rockburst acoustic emission (AE) parameters, a self-organizing...
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Compaction and seepage characteristics of broken coal and rock masses in coal mining: A review in laboratory tests
April 2024
Broken coal and rock (BCR) are an important component medium of the caving zone in the goaf (or gob), as well as the main filling material of fault fracture zone and collapse column. The compaction...
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Geothermal extraction performance in fractured granite from Gonghe Basin, Qinghai province, China: Long-term injection and production experiment
April 2024
The efficient exploitation of geothermal energy through enhanced geothermal systems (EGS) has been a relevant topic for hot dry rock (HDR) geothermal resources. When cryogenic fluid is injected into...
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Experimental investigation of stress unloading effects on rock damage and confining pressure-dependent crack initiation stress of porous sandstone under true triaxial stress environments
April 2024
This study investigates the impact of intermediate (σ2) and minimum (σ3) principal stress unloading on damage behavior and the confining pressure influence on crack initiation stress (σci) in true triaxial...
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