Fractal characteristics of crushed particles of coal gangue …
The 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, …
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Characterizations of macroscopic deformation and particle …
In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata movement …
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A coal gangue processing project in Shanxi
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 with very stable output, thanks to the ...
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Macroscopic and microscopic study on the compression …
Gangue backfilling coal mining is a green mining technology aimed at the problems of "three-unders:" coal under buildings, under water and under railway and gangue accumulations [1,2]. ... Junmeng Li et al. studied the macroscopic deformation and particle breakage characteristics of crushed gangue particle material after constant …
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Layered re-breaking behavior of gangue backfilling …
However, blindness remains regarding the particle size selection of backfilling gangue at different positions in the mining goaf when applying gangue backfilling mining technology. Even though it is the main backfilling material, there is a lack of existing research on the internal particle re-breaking properties of broken coal gangue and ...
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Compressive deformation and energy dissipation of crushed coal gangue
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 …
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Junmeng LI | PhD. | China University of Mining and Technology…
The irregular shape of gangue blocks will affect the coordination structure between blocks in the crushed gangue accumulation body, and then affect the engineering mechanical properties of crushed ...
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Mesoscopic fabric evolution and macro deformation response of crushed
The irregular shape of gangue blocks will affect the coordination structure between blocks in the crushed gangue accumulation body, and then affect the engineering mechanical properties of crushed ...
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Underground pneumatic separation of coal and gangue …
With the development of computer technology, video-signal on-line transition and processing technology has been perfected and raised, machine vision system have got great success in many fields [3]. ... The surface morphology of compacted and crushed gangue presents self-similarity and other fractal characteristics. This research …
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Characterizations of macroscopic deformation and particle crushing …
In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata movement and ground surface subsidence.In engineering practice, CGPM is generally circularly compacted first by the compaction machine to reduce its …
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Study on the propagation characteristics of methane-air
The explosion scene in gob was simplified and the position of the crushed gangue from the ignition source was set to 0.5 m, the actual setup is shown in Fig. 3.The gangue used in the experiments ...
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Technology and engineering test of filling goaf with coal gangue …
Process of filling goaf with coal gangue slurry. The process of filling goaf with coal gangue slurry is shown in Fig. 2.Specifically: the coal gangue is crushed by a multi-stage crusher and enters ...
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Study of the Internal Rebreaking Characteristics of Crushed …
The deformation and re-crushing characteristics of different lithological caving crushed gangues in mine goaf directly affect the overburden strata movement, …
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Study on the macro–micro evolution of compaction
The crushed gangue will be displaced laterally in the process of being compacted, and the wall of the cylinder will be subjected to a certain amount of lateral …
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Radiation characteristics of natural gamma-ray from coal and gangue …
Radiation characteristics of coal and roof-rock samples. We can know from the analysis that the content of the radionuclide in the sedimentary rocks is related to the content of clay minerals, the formation time, the environment of the sedimentary area and so on 30 – 32, therefore, we carried out analysis on the radiation characteristics of the …
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Powder Technology | Vol 384, Pages 1-574 (May 2021)
Read the latest articles of Powder Technology at ScienceDirect, Elsevier's leading platform of peer-reviewed scholarly literature ... select article Sensitivity analysis of process parameters for granular mixing in an intensive mixer using response surface methodology ... Influence of block shape on macroscopic deformation response and ...
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Transport mechanism and control technology of heavy …
Using the standard screen for aggregates, the crushed gangue particles were sieved into different groups with different size ranges (0–15, 15–30, and 30–50 mm) ... Status of technology for processing mine water and its trend in China. Coal Sci. Technol., 35 (2007), pp. 1-5, 10.13199/j.cst.2007.09.6.gaol.024. View in Scopus Google Scholar.
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Effects of particle sizes on compressive deformation and particle
Broken gangue from the collapsing roof of a longwall coal panel can be used as the backfilling material for goaf backfilling. The particle size gradation has important influence on the compressive deformation of the gangue backfilling material and particle breakage.The compressive deformation of the gangue backfilling materials at 4 different …
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Effects of Water Immersion on the Long‐Term Bearing …
1. Introduction. After coal mining, many mined-out spaces are formed underground, which causes strata movement, damage, surface subsidence, and collapse [1 – 5].Simultaneously, a large quantity of solid wastes such as gangue is discharged in the coal mining process [6 – 10].Gangue discharge and surface subsidence control are …
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Compaction characteristics and energy dissipation of …
ments of the mixture of gangue and y ash were carried out to improve the gangue-lling eect (Xu et al. 2011). The stress–strain curves of crushed sandstone, sandy mudstone …
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Wills' Mineral Processing Technology
Wills' Mineral Processing Technology provides practising engineers and students of mineral processing, metallurgy and mining with a review of all of the common ore-processing techniques utilized in modern processing installations. Now in its Seventh Edition, this renowned book is a standard reference for the mineral processing industry.
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crushed gangue processing coefficients
crushed gangue processing coefficients. Webcrushed gangue processing coefficients Gangue - Wikipedia In mining, gangue (/ /) is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit.It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body that …
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Microscopic fabric evolution and macroscopic deformation …
In the process of coal mining, the discharge of crushed gangue accounts for 15–20% of coal output. At present, the crushed gangue accumulated on the ground of …
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Compaction characteristics and energy dissipation of …
The main reasons for the compression of saturated crushed gangue were as follows: (1) Under the action of the axial loading, gangue particles overcame the frictional …
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Effects of Water Immersion on the Long‐Term Bearing …
1. Introduction. After coal mining, many mined-out spaces are formed underground, which causes strata movement, damage, surface subsidence, and …
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What are the uses of coal gangue after processing | LZZG
What are the uses of coal gangue after processing. April.22,2023. Coal gangue can be crushed to make sand, which can increase its utilization value. one. Uses of coal gangue: 1. Cement. Production of ordinary Portland cement; production of special cement; production of clinker-free cement. 2. Lightweight aggregate for concrete
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sbm/sbm which gangue crusher should be used.md at main
Contribute to chengxinjia/sbm development by creating an account on GitHub.
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en/167/crushed coal gangue crusher.md at main
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Layered re-breaking behavior of gangue backfilling …
Subsequently, Feng [42] and Li et al. [43] analyzed the spatiotemporal evolution of the internal re-breaking process of broken anthracite of different particle sizes. However, blindness remains regarding the particle size selection of backfilling gangue at different positions in the mining goaf when applying gangue backfilling mining technology.
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Particle-Crushing Characteristics and Acoustic …
In solid backfilling coal mining (SBCM), the crushed gangue backfilling material (CGBM) is generally compacted circularly by a compaction machine in order to reduce its compressibility. In this cyclic …
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