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421
Production Data Analysis and Practical Applications in the Sulige Tight Gas Reservoir, Ordos Basin, China
Published 2021-01-01“…Successful exploitation of tight sandstone gas is one of the important means to ensure the “increasing reserves and production” of the oil and gas initiative and also one of the important ways to ensure national energy security. …”
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422
Experimental Study on Seepage Properties of Postpeak Fractured Rocks under Cyclic Loading-Unloading Confining Stress and Axial Stress
Published 2021-01-01“…For this reason, the permeability of fractured sandstone and granite is experimentally investigated under cyclic loading-unloading confining stress and axial stress. …”
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423
Loading Rate Effect of Rock Material with the Direct Tensile and Three Brazilian Disc Tests
Published 2019-01-01“…A series of experimental tests were conducted to investigate the effects of loading rate on the tensile strength of sandstone by using four test methods, including a direct tensile method and three typical Brazilian disc methods (plate loading, circular arc loading, and strip loading). …”
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424
Experimental Investigation of Water-Inrush Risk Based on Permeability Evolution in Coal Mine and Backfill Prevention Discussion
Published 2019-01-01“…The minimum and maximum permeabilities occurred in the sandstone specimens that were subjected to elastic deformation and strain-softening stages, respectively. …”
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425
Influence of habitats on fish assemblages in tropical marine coastal areas of the Southwestern Atlantic
Published 2025-02-01“…Here we highlight relevant information for tropical areas little investigated by science in the Southwestern Atlantic, especially with regard to the importance of coastal sandstone reefs.…”
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426
Rock Mechanical Property Influenced by Inhomogeneity
Published 2012-01-01“…The homogeneities of grey diabase, black diabase, grey sandstone, and red sandstone are 7.8, 5.7, 4.4, and 3.4, separately; their average fractal dimensions of microstructure are 2.06, 2.03, 1.72, and 1.40 correspondingly, so the homogeneity is well consistent with fractal dimension. …”
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427
Experimental Study on the Permeability of Weakly Cemented Rock under Different Stress States in Triaxial Compression Tests
Published 2018-01-01“…Mudstone and shaly coarse sandstone samples of Jurassic units in northwestern China were collected to study the seepage mechanism of weakly cemented rock affected by underground mining operations. …”
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428
Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China
Published 2020-01-01“…To obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. …”
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429
Solar Energy Modelling over a Residential Community in the City of Calgary, Alberta, Canada
Published 2011-01-01“…Over the portion of Sandstone, ~1706.49 m2 roof surface area was suitable for potential installation of the photovoltaic cells. …”
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430
Yield components of the triticale collection material in the environments of the Middle Amur region
Published 2020-10-01“…The following cultivars were identified as promising breeding sources: ‘AC Certa’, ‘Lana’, ‘Zolotoy Grebeshok’ and ‘Ulyana’ for their optimal yield in the Middle Amur region; ‘AC Certa’, ‘Zolotoy Grebeshok’, ‘Mykola’, ‘Korovai Kharkivsky’ and ‘Victoria’ for earliness; ‘Victoria’, ‘Rovnya’, ‘Kobzar’ (Ukraine), ‘Losinovske’, ‘Zgurivsky’ and ‘Sandio’ for plant height; ‘Lotos’, ‘Yarilo’, ‘ZG 186’, ‘Oberig Kharkivsky’, ‘Tleridal’ and ‘Sandio’ for ear length; ‘Lana’, ‘Ulyana’, ‘Lotos, ‘Yarilo’, ‘ZG 186’, ‘Pamyat Merezhko’, ‘Victoria’, ‘Kobzar’, ‘Oberig Kharkivsky’, ‘Tleridal’ and’ Sandio’ for the number of spikelets per ear; ‘AC Certa’, ‘Lana’, ‘Dagvo’, ‘Pamyat Merezhko’ and ‘Kobzar’ for the number of grains per ear; ‘Ukro’, ‘Lotos’, ‘Yarilo’, ‘Rovnya’ and ‘Kobzar’ for grain weight per ear; ‘Ukro’, ‘Skory’ and ‘Rovnya’ for grain size; ‘Ukro’, ‘Skory’ and ‘Rovnya’ protein content in grain; ‘Dagvo’, ‘Kobzar’ and ‘Sandio’ for lysine content in grain; ‘AC Certa’, ‘Lana’, ‘Skory’, ‘Lotus’, ‘Yarilo’, ‘ZG 186’, ‘Pamyat Merezhko’, ‘Victoria’, ‘Rovnya’, ‘Kobzar’, ‘Losinovske’, ‘Zgurivsky’, ‘Oberig Kharkivsky’, ‘Tleridal’ and ‘Sandio’ for resistance to lodging; ‘Lana’, ‘Pamyat Merezhko’, ‘Victoria Zgurivsky’, ‘Oberig Kharkivsky’ and ‘Tleridal’ for disease resistance.Conclusion. …”
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431
Electrochemical Intelligent Recognition of Mineral Materials Based on Superpixel Image Segmentation
Published 2022-01-01“…Based on all the experimental results, it can be seen that after the two-stage processing of the designed superpixel algorithm and the region merging algorithm, the final sandstone slice image segmentation results are close to the results of manual labeling, which is helpful for the subsequent research on sandstone component identification. …”
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432
Integrated hydrothermal evolution of a Botucatu paleodune and a blanketing lava flow from the Serra Geral Group, Uruguaiana
Published 2025-02-01“…Rhombi and bowls at the top of the silicified sandstone units are significant, as is the poor preservation of eolian layering. …”
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433
Groundwater-Mixing Mechanism in a Multiaquifer System Based on Isotopic Tracing Theory: A Case Study in a Coal Mine District, China
Published 2018-01-01“…Palaeo-groundwater in a sandstone aquifer accounts for more than 60%, and that in the Cambrian limestone aquifer is lower than 20%. …”
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434
Source apportionment of the sediments entering dam using lithological and mineralogical studies
Published 2016-05-01“…The results showed that most sediment samples in Taleghan are of sedimentary sandstone, mainly containing the quartz and plagioclase minerals (quartz sandstone and arkose sandstone). …”
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435
Numerical Simulation of Dynamic Response Characteristics of Cutting Coal and Rock by a Roller Coal Cutter
Published 2021-01-01“…The torque from high to low is as follows: sandstone, mudstone, and coal. The average speed from high to low is as follows: coal, mudstone, and sandstone. …”
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436
Mechanical Properties of the Shear Failure of Rock Masses with Prefabricated Sinusoidal Fractures
Published 2022-01-01“…The TFD-20H/50J rock shear testing machine was used for shear tests on sinusoidal-fracture sandstone with different undulated heights. In the shear loading process, the prefabricated-fracture sandstone specimens with different undulated heights have the fracture-compacting stage, linear-elastic changing stage, bottom-up stage, and residual strength stage. …”
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437
Evaluation of the Water Yield of Coal Roof Aquifers Based on the FDAHP-Entropy Method: A Case Study in the Donghuantuo Coal Mine, China
Published 2021-01-01“…To evaluate the water yield of the sandstone aquifer in the roof of the Carboniferous-Permian Damiaozhuang Formation no. 8 coal seam in the Donghuantuo Mine, North China, seven main controlling factors affecting the water yield of sandstone aquifers are determined, including the permeability coefficient, consumption of drilling fluid, core recovery, aquifer thickness, brittle-plastic rock thickness ratio, fault scale index, and fault point density. …”
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438
Optical-electrical-acoustic wave multiparameter response characteristics of typical rocks in coal-bearing strata throughout the loading process
Published 2025-01-01“…During the tests, the strain measured using distributed optic fibers for sandstone, limestone, and mudstone under critical fracturing were 933×10−6, 401×10−6, and 3790×10−6, respectively. …”
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439
Numerical Simulation of Split-Hopkinson Pressure Bar Tests for the Combined Coal-Rock by Using the Holmquist–Johnson–Cook Model and Case Analysis of Outburst
Published 2020-01-01“…Based on the split-Hopkinson pressure bar (SHPB) test of the combined coal and rock with a bullet velocity of 4.590–8.791 m/s, the numerical model of four kinds of combined coal and rock with different sandstone-coal-sandstone ratios, including 1 : 1 : 1, 2 : 1 : 1, 1 : 1 : 2, and 1 : 2 : 1, is investigated. …”
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440
Analysis of Rock β-Dynamic Parameters and the Stability of Earthquake Dangerous Rocks Based on PFC
Published 2020-01-01“…Under cyclic loading, cracks had a degrading effect on the damping ration (β) and the damping coefficient (C) of sandstone. Mudstone recorded relatively low β and low brittleness whilst sandstone had high β and high brittleness. …”
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