Study on Transient Unloading Response Characteristics of Brittle Coal Samples Under Different Stress Paths
Sign Up to like & getrecommendations! Published in 2020 at "Geotechnical and Geological Engineering"
DOI: 10.1007/s10706-020-01250-4
Abstract: During the unloading process of engineering excavation, the high energy storage in brittle coal is induced to release, which leads to the failure of surrounding rock. The response characteristics of brittle coal samples under instantaneous… read more here.
Keywords: brittle coal; stress; response characteristics; vertical stress ... See more keywords
Experimental investigation of the wetting ability of surfactants to coals dust based on physical chemistry characteristics of the different coal samples
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Powder Technology"
DOI: 10.1016/j.apt.2019.05.021
Abstract: Abstract To select suitable surfactant as water-spray additive to improve dust suppression efficiency, six types of coal sample (lignite, long flame coal, non-caking coal, gas coal, coking coal, and anthracite) were selected from some typical… read more here.
Keywords: wetting ability; coal samples; chemistry; coal ... See more keywords
Petrographic and Raman spectroscopic characterization of coal from Himalayan fold-thrust belts of Sikkim, India
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Coal Geology"
DOI: 10.1016/j.coal.2018.07.014
Abstract: The present study focuses on the investigation of the optical anisotropy, optical sign, textural heterogeneity and deformational features of the maceral grains along with the Raman spectral characteristics of the seven coal samples collected from… read more here.
Keywords: thrust belts; reflectance; coal samples; himalayan fold ... See more keywords
Mechanical characteristics and dynamic damage evolution mechanism of coal samples in compressive loading experiments
Sign Up to like & getrecommendations! Published in 2019 at "Engineering Fracture Mechanics"
DOI: 10.1016/j.engfracmech.2018.04.005
Abstract: Abstract To achieve the qualitative and quantitative damage expression, coal samples within original cracks were selected to conduct uniaxial compressive loading experiments. During this process, acoustic emission signals were collected by AEwin Test for Express-8.0… read more here.
Keywords: compressive loading; damage evolution; damage; coal samples ... See more keywords
Quantitative characterization of void and demineralization effect in coal based on dual-resolution X-ray computed tomography
Sign Up to like & getrecommendations! Published in 2020 at "Fuel"
DOI: 10.1016/j.fuel.2019.116836
Abstract: Abstract The in-depth understanding of storage and migration of coalbed methane (CBM) requires the detail characterization of the void system in coal seams. In this study, the multi-scale structures of coal samples from No. 3#… read more here.
Keywords: resolution; characterization void; dual resolution; coal samples ... See more keywords
Influences of path control effects on characteristics of gas migration in a coal reservoir
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DOI: 10.1016/j.fuel.2020.117212
Abstract: Abstract In this paper, the influences of path control effects on characteristics of gas migration in coal samples with different sizes were investigated by using self-developed test device. Moreover, the mathematical model regarding path control… read more here.
Keywords: gas; migration; coal samples; coal ... See more keywords
Changes in the microstructure of low-rank coal after supercritical CO2 and water treatment
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DOI: 10.1016/j.fuel.2020.118493
Abstract: Abstract With a focus on different CO2 pressures and H2O, the influences of the ScCO2–H2O coupling effect on the microstructures of low-rank coal samples were compared and analyzed, offering further analysis of the CO2 sequestration… read more here.
Keywords: water; treatment; co2; effect ... See more keywords
Preparation of foamed gel for preventing spontaneous combustion of coal
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DOI: 10.1016/j.fuel.2021.121024
Abstract: Abstract As a fire prevention and extinguishing technology, foamed gel was developed to control spontaneous combustion of coal effectively. Foamed gel is a compositional system formed by a foaming agent, polymers, and N2 through physical… read more here.
Keywords: foamed gel; combustion coal; spontaneous combustion; coal samples ... See more keywords
Experimental investigation on microstructure evolution and spontaneous combustion properties of aerobic heated coal
Sign Up to like & getrecommendations! Published in 2021 at "Fuel"
DOI: 10.1016/j.fuel.2021.121766
Abstract: Abstract Since coal oxidation and heat accumulation are prerequisites for coal spontaneous combustion, it is of great significance to study the characteristics of coal oxidation and heat accumulation to grasp characteristics of spontaneous combustion of… read more here.
Keywords: oxidation; spontaneous combustion; coal samples; aerobic heated ... See more keywords
Effects of high temperature on the microstructure and mechanical behavior of hard coal
Sign Up to like & getrecommendations! Published in 2020 at "International journal of mining science and technology"
DOI: 10.1016/j.ijmst.2020.05.021
Abstract: Abstract Coal is a common porous sedimentary rock whose microstructure and mechanical behavior are often affected by high temperature. In order to deeply investigate the effect of high temperature on the structure and mechanical properties… read more here.
Keywords: temperature; mechanical behavior; high temperature; microstructure mechanical ... See more keywords
Characteristics of self-potential of coal samples under uniaxial compression
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Geophysics"
DOI: 10.1016/j.jappgeo.2019.05.016
Abstract: Abstract Deformation and fracture of a coal body under load may cause potential changes. Using coal samples under uniaxial compression, the coupling relationships between coal mass potential (surface potential) and stress during a complete stress–strain… read more here.
Keywords: uniaxial compression; stress; samples uniaxial; coal samples ... See more keywords