Coal and gas outburst prediction model based on principal component analysis and improved support vector machine
Available online 17 November 2023
In order to predict the coal outburst risk quickly and accurately, a PCA-FA-SVM based coal and gas outburst risk prediction model was designed. Principal component analysis (PCA) was used to pre-process...
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Stability analysis and grouting treatment of inclined shaft lining structure in water-rich strata: A case study
Available online 14 November 2023
The stability of inclined shaft lining structure (ISLS) in complex water-rich strata is affected by many factors, such as water pressure, joint, soft rock, lining corrosion and so on. The instability...
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Monitoring and evaluation of disaster risk caused by linkage failure and instability of residual coal pillar and rock strata in multi-coal seam mining
Available online 2 November 2023
Comprehensive research methods such as literature research, theoretical analysis, numerical simulations and field monitoring have been used to analyze the disasters and characteristics caused by the...
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A numerical simulation study on the evolutionary characteristics of the damage process of karst soil cavity under positive pressure effect
Available online 27 October 2023
Positive pressure effect is the result of rapid urban development in recent years, which leads to over-exploitation of karst groundwater, coupled with the emergence of extreme weather (such as heavy...
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Risk field assessment of longwall working face by the double-sided roof cutting along the gob
Available online 17 October 2023
In order to study the mechanism of the dual side roof cutting technology on the composite disaster of gas and coal spontaneous combustion in goaf, a model for the evolution of porosity and permeability...
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Influence of cyclic dynamic disturbance on damage evolution and zoning effect of coal-rock under local static load constraint
Available online 15 October 2023
In order to obtain the characteristics of the effects of cyclic impact loading on the damage of coal-rock in the presence of a local static load constraint, the evolution of the damage factor and the...
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Simulation of electromagnetic high-frequency wave propagation processes in multilayer geo-structures
September 2023
The paper describes the research findings on georadar detection of hydraulic fractures in hydrocarbon reservoirs. Numerical and physical modeling enables studying effect exerted by the electromagnetic...
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Unloading-slippage mechanism of coal bump in gateroad of longwall
September 2023
Coal bump seriously threatens the safe and efficient mining of coal, and the research on the occurrence mechanism of coal bump is of great significance. The roadway coal bump accounts for 86.8% of the...
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Comparison between bearing characteristics of pervious concrete pile composite foundations with different replacement ratios
September 2023
The replacement ratio is an essential factor in evaluating the bearing capacity characteristics of composite foundations. This study focuses on the bearing capacity of a pervious concrete pile with...
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Research on the effects of heating and cooling processes on the mechanical properties of yellow rust granite
September 2023
Geological hazards caused by high-temperature rocks cooling down after encountering water are closely related to underground mining and tunneling projects. To fully understand the impact of temperature...
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Characterization and impact analysis of freezing and expansion disease of roadbed in seasonal freezing zone: A case of heavy railroads
September 2023
The freezing and expansion diseases of railroad roadbeds are prevalent in areas that experience seasonal freezing. This study aims to investigate the features of the freezing and expansion mechanism...
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Study of a damage constitutive model for water-bearing coal measures sedimentary rock with nonlinear deformation during compaction stage
September 2023
The problem of repeated immersion-induced fatigue damage in engineering coal measures sedimentary rock, including coal-rock pillars, reservoir bank slopes, and water-rich tunnels at the boundary of...
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Application of artificial neural networks for stress state analysis based on the photoelastic method
June 2023
The present article proposes an evolutionary development of the photoelasticity method for measuring stresses based on annular photoelastic sensors application along with stress pattern recording with...
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Peak-strength strain energy storage index for evaluating coal burst liability based on the linear energy storage law
June 2023
The strain energy storage index WET was widely used to evaluate coal burst liability, but the scientific evidence for selecting the unloading stress level interval (around 80% of peak strength) remains...
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Piston mechanism of interaction of non-linear geomechanical and physicochemical gas exchange and mass transfer processes in coal-bearing rocks
June 2023
The article focuses on a theoretical and experimental framework for the quantification of interaction between nonlinear geomechnical and physicochemical processes in high-stress coal-bearing rock mass...
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Prospect and research progress of detecting dynamic change in crustal stress by bedrock temperature
June 2023
A new method of detecting stress change by temperature (DSCT), has been recently proposed on the basis of the experimental results in laboratory, and verified by field observation. In this paper, at...
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A way to determine the positive direction of the shear force on the elemental area
June 2023
This study is devoted to amendment to some concepts related to the construction of Mohr's circles on the plane of variables “normal and tangential components of the stress vector on the elemental area”....
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Assessment of seismic retrofitting interventions in reinforced concrete structures
June 2023
Destruction of reinforced concrete (RC) structures, particularly non-ductile RC structures, in recent earthquakes demonstrate their vulnerability under lateral forces generated in an earthquake. Despite...
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Evaluation of ground motion parameters and seismic response of reinforced concrete buildings from the Mw 6.9, 2011 Sikkim earthquake
June 2023
The continuous collision of the Eurasian plate and the Indian plate has resulted in several earthquakes in the Himalayan region. The 6.9 Mw 2011 Sikkim earthquake, which caused immense damage to the...
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Preliminary study on the determination of the Weibull modulus of strength distribution in quasi-brittle materials
June 2023
In this paper, how to determine the Weibull modulus of a fracture strength distribution is discussed with its physical implications for quasi-brittle materials. Based on the Markov chain assumption,...
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Geomechanics model test research on large deformation control mechanism of roadway disturbed by strong dynamic pressure
June 2023
Comprehensive mechanized top-coal caving mining is one of the efficient mining methods in coal mines. However, the goaf formed by comprehensive mechanized top-coal caving mining is high, and the goaf...
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Acoustic emission parameters and energy dissipation law of cyclic load and unload damage of dihydrate gypsum under different loading rate
June 2023
In order to explore the effect of loading rate on physical and mechanical properties of dihydrate gypsum, cyclic loading and unloading mechanical tests were carried out at different loading rates. Test...
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Quantitative assessment of energy changes in underground coal excavations using numerical approach
March 2023
Coal burst is caused by a dynamic and unstable release of energy within the overstressed rock mass/coal during the mining process. Although the occurrence of coal burst is a result of the complex impacts...
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An assessment of earthquake vulnerability by multi-criteria decision-making method
March 2023
Earthquake is one of the most destructive catastrophes in Bangladesh and the evaluation of vulnerability is a prerequisite for the earthquake risk estimation. As a result, determining vulnerability...
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Hardrock burst mechanisms and management strategies
March 2023
Rockbursts occur as a direct consequence of underground mining or civil excavation. The general scale of their seismic disturbance and consequences depend upon known factors. However, uncertainty remains...
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