Crushed Gangue Processing Coefficients
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- Crushed Gangue Processing Coefficients
The test results show that: the crushing of coal rock particles exists in almost the whole compaction process of the crushed coal rock body, and the crushing of coal rock …
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A broken coal rock body is divided into two categories: the stacked-crushed coal rock body, such as the coal and gangue that emerged from the mining area, etc., the structure is looser and forms a natural stacking state [17, 18] and the local-crushed coal rock body, such as the crushed structure of the coal column, the crushed structure of the ...
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Intermittent 0-5 mm particle size grading structure; (b) intermittent 15-20 mm particle size grading structure. Figure 8 shows that the crushed gangue in the compression process is mainly ...
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gangue filling, a large-scale crushed rock compression test has been prepared in this paper, which can meet the maximum particle size of gangue compression in the field.
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Coal mining causes serious ecological and environmental damage. The crushed gangue is backfilled into underground goaf, which not only inhibits mining-induced subsidence but also reduces accumulation of waste on the ground: however, the effects of backfilling with gangue backfill materials in goaf are affected by a combination of multiple factors. To predict …
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gangue crushed into the soil use domek podlasem.pl The crushed gangue materials which are filled into the goaf in solid backfilling coal mining become the main body of bearing the overburden after the tamping process.This is an open access article distributed.Potential of …
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A broken coal rock body is divided into two categories: the stacked-crushed coal rock body, such as the coal and gangue that emerged from the mining area, etc., the structure is looser and forms a natural stacking state [17,18] and the local-crushed coal rock body, such as the crushed structure of the coal column, the crushed structure of the ...
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Grain size and shape fractal characteristics of gangue in the process of 'jaw breaking-ball milling' ... After the gangue is crushed, it is often difficult to calculate the number of particles, but the mass of each particle can be obtained by sieving and weighing. ... and the R 2 of the regression coefficient is at least 0.98, indicating ...
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sbm gangue crushed gangue processing ... Find file Blame History Permalink b · f661b88d dushusbm authored Nov 02, 2022. f661b88d Loading ...
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dissipation of crushed gangue under actual mining stress. Authors consider the actual mining stress state in goaf to design the experiments depending on the background of gangue backll in the Renjiazhuang Coal Mine. The energy dissipation of crushed gangue was also analyzed, because gangue backfill controls the dynamic pressure through the
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The coefficients of determination (R) were 0.685 and 0.597, respectively. ... The strain–stress relationship in the compaction process of crushed gangue and the crushing law of gangue particles ...
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Crushed Gangue Processing Technology. ... A coal gangue processing project in Shanxi The European impact crusher is well suited for crushing operations on various soft and medium hard ores, such as coal gangue. Located in Shanxi, one of the major coal-producing provinces in China, the project was put into operation in the first half of 2013 ...
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Gangue material in the process of bearing pressure, subject to extrusion movement occurs crushing deformation, particles of the deformable space affects the mechanical properties of the gangue ...
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Three stages of compressive deformation for crushed gangue is found. • The energy density of crushed gangue increases nonlinearly as the strain increases. • The …
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Zhou et al. [8] conducted impact crushing experiments on single crushed gangue particles, and found that with the increase of particle size and ... The axial stress state has a significant effect on the lateral pressure coefficient of gangue. The lateral pressure coefficient initially increases and then decreases with the increase of axial load ...
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As a result, the compression deformation characteristics of crushed gangue are significantly affected. In this paper, by using the method in literature 34 and through the secondary development of ...
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To study the long-term bearing characteristics of crushed gangue in goaf under water immersion conditions, the creep test of the crushed gangue in the water immersion state was performed by using ...
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This study is focused on the fractal characteristics of gangue particle size distribution(PSD) during ball milling process, taking mudstone, sandstone, and limestone gangue as the research object ...
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crushed gangue processing coefficients Gangue - Wikipedia In mining, gangue (/ ɡ æ ŋ /) is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in …
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To explore the PSD structural characteristics of gangue under ball milling time, firstly, the gangue samples from each lithology were manually screened and evenly mixed to create three types of gangue samples with the same initial particle size distribution presented in Fig. 3 (a).Then 5 kg gangue samples were weighed and filled into the ball mill cylinder each …
WhatsApp: +86 18221755073The surface morphology of compacted and crushed gangue presents self-similarity and other fractal characteristics. This research constructed a fractal model for the particle size of compacted and crushed gangue based on fractal theory and particle size distribution information. To investigate the fractal characteristics of compacted gangue, compaction experiments were …
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In this paper, through laboratory tests and numerical simulations, the bearing characteristics and deformation damage of gangue are deeply investigated and analyzed from …
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To study the compaction and re-crushing characteristics of the gangue particles, continuous grading and intermittent grading of two different structures were designed to study …
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The permeability of crushed coal gangue follows a hierarchical distribution law and the permeability changes in the magnitude range of 10–11 ~ 10–9 m2. The fractal dimension is inversely related to the permeability of crushed coal gangue. ... The acceleration coefficient reflects the change process of the fluid viscosity force; when a large ...
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Coal gangue is crushed and then backfilled into the mining goaf as the support for the overburden strata with the purpose of controlling strata movement and surface subsidence …
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To study the long-term bearing characteristics of crushed gangue in goaf under water immersion conditions, the creep test of the crushed gangue in the water immersion state was performed by using ...
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The coal gangue was taken from Xin'an Coal Mine in Luoyang, Henan Province. The lithology of the gangue was sandstone, and the average density of the gangue was 1.369 × 10 3 kg/m 3, with an average uniaxial compressive strength of 38.03 MPa.To reduce the impact of boundary effects on the results (He et al., 2022), the larger gangue particles were crushed …
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2. Compaction and Re-Crushing Process of Crushed Coal Gangue Graded crushed gangue, in the compaction process, will be accompanied by the re-crushing of the particles, and the re-crushing of the particles will, in turn, affect its grading state, changing the compaction characteristics of the graded gangue and its
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Consequently, gangue waste piles have become one of the main sources of environmental pollution [8], [9]. To improve the mining environment and safety, gangue backfilling is widely applied [10], [11]. As a primary type of backfilling material, broken coal gangue is gradually compacted by overlying strata when backfilled into the mining goaf.
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Gangue filling in the goaf is an effective measure to control the surface subsidence. However, due to the obvious deformation of gangue compression, the filling effect deserves to be further studied. To this end, the deformation of coal gangue filling in the goaf is analyzed by theoretical analysis, large-scale crushed rock compression test, and field investigation.
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The above crushed rock mass compaction system with a DDL600 electronic universal testing machine as the loading device was implemented to determine the compaction characteristics of crushed coal gangue samples, and crushed coal gangue particles with the same gradation structure were loaded into the compression cylinder under confinement.
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The test results show that: the crushing of coal rock particles exists in almost the whole compaction process of the crushed coal rock body, and the crushing of coal rock particles has a non ...
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The results show that the nonuniformity coefficient of mixed gangue is 55.2 and the curvature coefficient is 1.53, which significantly improve the grain gradation of washed gangue.
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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 ...
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The particle size gradation of the two gangue specimens exhibited fractal characteristics after manual crushed, and the fractal dimension of each crushed specimen ranged from 0.352 to 2.654. (2) Regarding sandstone and sandy mudstone, the fractal dimension D of specimens with particle sizes from 20 to 31.5 mm and 31.5 to 50 mm rose quickly at ...
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