loading crushed coal
IEEE Xplore - Experimental Study on Nonuniform Compaction and
The crushed coal gangue particles are widely used in solid backfilling. However, the nonuniform compaction and internal re-crushing behavior of crushed coal gan
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Experimental study on the permeability of crushed coal
2021.11.29 In the experiments, four gradients of axial displacement control 5, 10, 15, and 20 mm were adopted to load the coal specimens with different grading
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Evolution Characteristics of Bulking Factor in the Multi
2021.3.1 The research results are summarized as follows: (1) in the process of axial loading, the bulking factor of broken coal generally decreased, but showing three
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Deformation Behaviour of Crushed Waste Rock Under
2021.8.28 Crushed gangue can be used as a backfilling material for underground mining goaf backfilling in order to control strata movement and mining subsidence. If
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Experimental study on the secondary breakup properties
2022.2.1 Li et al. [18] investigated the compaction characteristics of crushed coal during the loading and unloading process. It was found that the deformation of crushed
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Applied Sciences Free Full-Text Effects of Loading Stress and ...
2022.11.4 Coal mine waste rocks, mainly broken gangue, can be used as filling materials to backfill into goafs. Under the overburden load, the backfill body is vulnerable
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Effect of particle size on re-crushing characteristics of crushed coal ...
2022.6.1 Effect of particle size on re-crushing characteristics of crushed coal during axial loading Semantic Scholar. DOI: 10.1016/j.powtec.2022.117675. Corpus ID:
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Quantitative analysis of layered re-crushing of crushed coal
2023.8.1 The results showed that: (1) the degree of particle re-crushing decreased from the loaded side (the upper layer) to the fixed side (the lower layer). In the early
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Investigating the effects of effective stress on pore-dependent
2021.12.23 The lateral limit compression test of the crushed coal body was designed, ... 20 and 30 kN were used to perform progressive loading seepage tests on coal specimens with different grading structures. Each axial loading test was carried out at seepage pressure levels of 0.5, 1.0, 1.5, 2.0, and 2.5 MPa, respectively, and the axial ...
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Characterizations of macroscopic deformation and particle crushing
2019.2.1 However, coal waste rock is a granular material and will undergo compressive deformation and particle breakage under the overburden load, meanwhile the breakage degree of the crushed waste rock particles will further affect the compression properties of the backfill materials in turn [19,20].
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Effect of particle size on re-crushing characteristics of crushed coal ...
2022.6.1 DOI: 10.1016/j.powtec.2022.117675 Corpus ID: 250064041; Effect of particle size on re-crushing characteristics of crushed coal during axial loading @article{Guorui2022EffectOP, title={Effect of particle size on re-crushing characteristics of crushed coal during axial loading}, author={Feng Guorui and Fan Zhilong and Li Zhen
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Investigation on tectonically deformed coal particle crushing by
2023.10.1 The experiments on lateral restraint loading were conducted on coal rock particles, and the results showed that the crushing of these particles was observed during the entire compaction process of the crushed coal rock. This crushing phenomenon significantly impacted the deformation of the crushed rock [25].
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Fractal characteristics of crushed particles of coal gangue under ...
2017.1.1 The fractal dimensions of crushed sandstone and sandy mudstone under compaction are calculated. The fractal dimension of each crushed specimen ranges from 0.352 to 2.654 with increase of stress. The fractal dimension increases with increased content of small particles and tends to be a definite value.
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Compressive deformation and energy dissipation of crushed coal
2016.9.1 Yanan Sun Peisen Zhang Wei Yan Fenqian Yan WU Junda. Geology. Archives of Mining Sciences. 2023. In this study, the compressive deformation of crushed sandstone was tested using a crushed rock deformation-seepage test system, and the effects of various factors, including crushed rock grade,. Expand.
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Effect of particle size on re-crushing characteristics of crushed coal ...
2022.6.1 The deformation and re-crushing characteristics of crushed coal and rock directly affect the porosity and permeability distribution of the mining gob and overburden strata movement, which ...
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Study on the distribution pattern of particle re-crushing in the coal ...
2022.1.18 In order to investigate the compaction and re-crushing characteristics of crushed coal gangue with different gradation, the compaction fractal test was carried out for crushed coal gangue with different Talbol power index n. The compaction deformation parameters such as displacement, stress-strain were analyzed according to the test
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Quantitative analysis of layered re-crushing of crushed coal
2023.8.1 The crushed coal rock mass is compacted and re-crushed during the collapse and sinking of the overburden strata. This process changes the caved zone's physical-mechanical properties and seepage characteristics, further affecting the migration and distribution of water and gas [[13], [14], [15]].
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Seepage properties of crushed coal particles - ScienceDirect
2016.10.1 Because H 1 ~ H 4 was fixed when the seepage device was designed, we can calculate h 0 by H 5, h 0 = 180 − 110 − 18 − 4 + H 5 = 48 + H 5. Step 2: Apply the axial load. The axial load is applied to the coal sample and kept for steady until the completion of step 3. Step 3: Apply the gas pressure difference to the sample.
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Apa Arti "CRUSHED COAL" Dalam Bahasa Indonesia - Online
terjemahan dalam konteks "CRUSHED COAL" dalam bahasa inggris-bahasa indonesia. Cut off areas must be powdered with crushed coal. - Area yang terpotong harus bubuk dengan batubara yang dihancurkan.
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Deformation Behaviour of Crushed Waste Rock Under Lateral Cyclic Loading
2021.8.28 Crushed gangue can be used as a backfilling material for underground mining goaf backfilling in order to control strata movement and mining subsidence. If buildings or railways are located on the surface above the coal mine, a certain lateral loading stress can be pre-applied to the crushed gangue backfilling material.
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Investigating the effects of effective stress on pore-dependent ...
2021.12.23 The lateral limit compression test of the crushed coal body was designed, ... Each axial loading test was carried out at seepage pressure levels of 0.5, 1.0, 1.5, 2.0, and 2.5.
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Effects of size and loading rate on the mechanical ... - ScienceDirect
2019.1.15 To understand the roles of particle size, shape, and strain rate on their mechanical properties, the crushing behavior of 800 coral particles with different shape factors and size groups (i.e., 2.36–4.75 mm, 4.75–9.5 mm and 9.5–16 mm) at various loading rates (i.e., 0.06 mm/min, 0.6 mm/min, 3 mm/min and 10 mm/min) are studied.
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Experimental Study on Nonuniform Compaction and Re
2022.11.1 Request PDF Experimental Study on Nonuniform Compaction and Re-Crushing Behavior for Crushed Coal Gangue Under Axial Loading The crushed coal gangue particles are widely used in solid backfilling.
اObtener precioIEEE Xplore - Experimental Study on Nonuniform Compaction and
2022.9.19 The crushed coal gangue particles are widely used in solid backfilling. However, the nonuniform compaction and internal re-crushing behavior of crushed coal gangue under bearing stress have not yet been revealed in current research. But this is particularly significant for improving the filling effect and quality. In this article, with the aid
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of crushed coal gangue samples, and crushed coal gangue particles with the same gradation structure were loaded into the compression cylinder under confinement. The press was acti-vated, and the target axial stress was applied to the broken coal and rock mass sample through the computer control system in a gradually increasing loading manner.
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Effect of Particle Size on the Energy Evolution of Crushed
2016.12.31 The load force reaches the first level as the unloading curve varies from the original ... Tang X, Guo WB (2012) Experiment study of compaction characteristics of crushed stones from coal seam roof. China J Rock Mech Eng 31:18–26. Google Scholar Yossifova MG (2014) Petrography, mineralogy and geochemistry of Balkan coals and ...
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Recycling of crushed waste rock as backfilling material in coal
2019.3.1 The test results showed that: (1) the lateral loading exerted a significant influence on the porosity, strain, and lateral pressure coefficient of crushed WRBs during lateral and axial loading; (2 ...
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Compressive deformation and energy dissipation of crushed coal
2016.9.1 Crushed gangue, an inhomogeneous and discontinuous medium, is accompanied with the absorption and dissipation of energy under compression. In order to study the compressive deformation and energy dissipation of gangue in the loading process under conditions of different particle sizes, loading rates, and first-time stress loads, a
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