An equation for predicting stress-strain relationship during compression-induced deformation of gangue backfill materials under multi-factor coupling effects was established and shows that this equation can predict compression- induced deformation in goaf, beneficial to providing a basis for predicting strata movement and surface …
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The crushed particle size came from the complete caved zone gangue in the longwall goaf of a mine. The maximum thickness of the caved zone was about 20 m, and the
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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 compaction process, the particles are crushed, which has a significant effect on the deformation resistance of CGBM. However, the …
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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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The microscopic fabric evolution law and macroscopic deformation response characteristics of crushed gangue considering triaxial compression condition and …
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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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the topic is original and it addresses the possibility of using crushed gangue in road engineering (via the study of water conditions influence on the crushed gangue). The obtained curves showing the influence of water content on crushed gangue under confining pressure are interesting for use as well was the relationship curves between …
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The compaction and re-crushing characteristics of crushed gangue are important factors which affect the quality and effectiveness of the filling of the quarry. To study the compaction and re-crushing …
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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
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To analyse the influences of particle size of backfill materials on surface subsidence, the compaction properties of crushed gangue backfill materials (CGBM) with different particle sizes were tested by using the YAS5000 testing machine and a self-made compacting device. Moreover, based on the strain hardening behaviour of CGBM in the …
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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. Its resistance to deformation ...
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The crushed coal gangue particles are widely used in solid backfilling. However, the non-uniform compaction and internal re-crushing behavior of crushed coal gangue under bearing-stress have not ...
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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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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 …
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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. Its resistance to deformation ...
WhatsApp: +86 18221755073
The crushed coal gangue particles are widely used in solid backfilling. However, the non-uniform compaction and internal re-crushing behavior of crushed coal gangue under bearing-stress have not ...
WhatsApp: +86 18221755073
The strain–stress relationship in the compaction process of crushed gangue and the crushing law of gangue particles were obtained through the test, and the effects of the axial stress, water ...
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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 ...
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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 the self-developed large-scale deformation-seepage test system of crushed rock. The effects of the rock lithology, axial stress, and …
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In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata …
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Mineral processing, art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock, or gangue. It is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive metallurgy.
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Coal mining is indispensable due to the widespread use of coal, and gangue is the accumulated solid waste byproduct that persists in mined lands, even after the mines have been abandoned 1.In the ...
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for crushed gangue in a deep longwall mining area's caved zone. The study's ndings offer theoretical direction for the movement of the mining zone's surface and the underlying gangue layer, as ...
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The gangue was crushed into gangue powder through multiple stages of crushing and screening. Before each daily experiment, 300 tons of the finished gangue powder were transported to the No. 2 ...
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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 pressure due to the presence of the ...
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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. Its resistance to deformation is … Expand. 16 [PDF] Save.
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The impacting crusher was used to impact crushing test on coal and gangue from three mining with different impact velocity.The distribution function of coal and gangue,the influence of the impact velocity and the hardness of coal and gangue on the distribution function were got from the data fitting of experimental results.The results show …
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To study the deformation characteristics of crushed gangue under different water content conditions, the confined compaction test of crushed gangue was carried …
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DOI: 10.1016/J.POWTEC.2016.09.049 Corpus ID: 99219669; Fractal characteristics of crushed particles of coal gangue under compaction @article{Zhang2017FractalCO, title={Fractal characteristics of crushed particles of coal gangue under compaction}, author={Jixiong Zhang and Meng Li and Zhan Liu and Nan Zhou}, journal={Powder …
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Crushed gangue models were made by gangue block containing single shape blocks or mixed-shape blocks. The influence of block shape on the macro deformation response and meso-fabric evolution of crushed gangue under triaxial compression was studied. The main conclusions are as follows: Li et al. (2020a) [1] the …
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