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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— 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 … Expand. 2. Save. Massive Hydraulic Fracturing to Control Gas Outbursts in Soft Coal Seams.
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— Innovations in pavement technology lead to the incorporation of coal gangue (especially high content of kaolinite and illite) into asphalt mixtures, making it a good roadbed material. The coal …
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The following conclusions were obtained, (1) the axial displacement increment and fractal dimension of the graded crushed gangue are closely related to the graded structure of …
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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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— In recent years, solid waste backfill mining has developed rapidly and widely used to control surface subsidence and reduce accumulation of solid waste. As crushed materials are used to backfill goafs, the particle size of backfill materials becomes a key factor influencing the control of surface subsidence. To analyse the influences of particle …
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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 soil sulfur (S) was detected to be much higher in the soil of GP than CK-near and CK-far plots. CK-near soil contained 0.1 ± 0.06% sulfur, and GP had 1.0 ± 0.21%.
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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 energy dissipation of the compaction test includes three parts: ① compaction deformation of crushed gangue (including gap closure, friction slip and …
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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 ...
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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 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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Morphological characterization of crushed coal gangue by micro X-ray computed tomography scanning
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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 out under five different water content …
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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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— Coal gangue is a solid waste associated with the production process of coal mines, and each ton of coal can be accompanied by 0.15 to 0.2 tons of coal gangue. ... In order to optimise the control effect of crushed gangue overlying rock, this article focuses on the regulating effect of gangue particle size grading on mechanical properties ...
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— In the present work, the impact crushing tests were conducted to obtain the effects of sizes, gangue mixture ratios, and crushing velocities on the fractal characteristics of the crushed PSD characteristics, using an in-house designed device.
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— Under the action of axial load, the deformation of crushed gangue in the mining area mainly experiences the following three stages: The first stage is the initial compaction stage.
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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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— Aiming at the problem of the confined compaction deformation of crushed gangue, this paper studied the relationship between the compaction deformation of …
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Generally speaking, after reasonable processing and utilization, coal gangue has high application value and wide range, so many investors come to consult coal gangue …
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— The accumulation of crushed gangue on the ground not only wastes a large number of land resources, but also causes a series of environmental problems such as soil pollution, surface vegetation damage, surface water and groundwater pollution. In a word, it poses a great threat to the ecological environment and human health in the mining area …
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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.
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The crushed gangue from pit mine is widely used in underground solid backfilling mining. According to the compression state of crushed gangue, and the characteristics of gangue blocks with ...
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— The distribution discipline of impact crushed on coal and gangue [J]. Journal of China Coal Society, 2013, 38(Supplement 1): 54–58. (in Chinese) Google Scholar GAO Kui-dong, DU Chang-long, WANG Hao-xiang, ZHANG Shi-bo. An efficient of coal and gangue recognition algorithm [J]. International Journal of Signal Processing, Image …
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— Li et al. [[56], [57], [58]] based on the digital 3D model of the real shape of the irregular gangue block through CT scanning test, established the numerical model of PFC, and studied the influence of block shape on the macro deformation response and meso-fabric evolution of crushed gangue under triaxial compression.
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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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— After stage II, the permeability of crushed gangue decreases to the magnitude of 10 − 15 m 2, while the impermeability increases; 5) the non-Darcy β factor is negative for gangues with size larger than 10 mm, while that gradually becomes positive with porosity decrease for mixed gangues and gangues with size less than 10 mm.
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— 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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DOI: 10.1155/2021/6675984 Corpus ID: 233708259; Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf @article{Jiang2021EffectsOW, title={Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf}, author={Ning Jiang and Dawei Yin and …
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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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— 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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