Research on Particle Size and Energy …
Zheng et al. used fractal distribution and Weibull distribution to represent the distribution law of coal gangue fragmentation size and analyzed the relationship between the coal gangue crushing …
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Near crushing mechanism of gangue-containing coal …
Near crushing mechanism of gangue-containing coal seams and parameter optimization for combined fully mechanized caving Xiaobo Hao1*, Pengcheng Liu1, Yanhui Deng1, Xiaolou Chi2 and Zhihua Li2 ...
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Effects of Water Soaked Height on the Deformation and Crushing …
In solid backfill coal mining (SBCM), loose gangue backfill material (LGBM) is used to backfill the goaf after coal resources are exploited from the underground mines. Under certain geological conditions, LGBM with a certain height may be soaked in the water, and then becomes saturated, significantly altering its mechanical properties. The …
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Monitoring and Assessment of Cemented Paste Backfill Containing Coal
The main reason for the size of the coal gangue is the power required for crushing coal gangue. As shown in Figure 1, the raw gangue had a large particle size, i.e., approximately 300 mm. The power required for crushing the coal gangue from a particle size of 300 mm to 25 mm was much lower than that required for crushing the …
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Experimental Study on Nonuniform Compaction and Re-Crushing …
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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Coal Gangue Crushing Project Supplier | Mobile Crushing Solutions
It's crucial to choose the right equipment for crushing coal gangue. The reason why we choose AGICO is that they have a good reputation, quality warranty, considerate service, and competitive price. The track-mounted type mobile crusher solves the problem of limited site ground. In addition, the early-stage investment is small.
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Study on the macro–micro evolution of compaction
In the current research, a large number of studies have been carried out on the compressive macroscopic deformation characteristics of crushed gangue, and its …
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Experimental Study on Crushing Characteristic of Coal and …
In order to analyze crushing characteristics of coal and gangue and its influence on separation effect, impact crushing experiments for coal and gangue were …
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Compaction characteristics and energy dissipation of crushed gangue …
The coal gangue samples were collected 15 times and approximately 50 kg each time from the waste dump in the Renjiazhuang coal mine, as shown in Fig. 3a, which is located in Ningxia Hui autonomous region, China. To solve the problems of the massive accumulation of coal gangue, strong ground pressure and serious subsidence in the …
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Experimental Study on Crushing Characteristic of Coal and Gangue …
Experimental results showed that crushing ratios of coal and gangue decreased with the increase of particle size and impact velocity. As the impact velocity was between 5 m/s-8 m/s and the initial ...
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Particle size distribution of coal and gangue after impact …
The experimental results indicate that the Rosin-Rammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and there is a minimum overlap region when the impact velocity is 12.10 m/s which leads to the minimum mixed degree of coal and gangue, and consequently …
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Field study on the improvement of coal gangue filling using …
In this study, dynamic compaction method was used to treat the gangue hill of the Xinglongzhuang coal mine in China, and the deep compaction of deep coal gangue was examined. The crushing characteristics and improving depth of coal gangue filling under different dynamic compaction conditions were determined. Dynamic …
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Frontiers | Near crushing mechanism of gangue-containing …
Based on the geological and mining conditions of Workface 822 of the Yuandian No. 1 Mine, this paper analyzes the crushing mechanism of gangue coal …
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Particle size distribution of coal and gangue after impact …
The experimental results indicate that the Rosin-Rammler distribution could accurately describe the particle size distribution of broken coal and gangue under …
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Which Crusher is Better for Coal Gangue Crushing?
The coal gangue vertical compound crusher can achieve more crushing and less grinding and is an ideal fine crushing equipment for energy saving and consumption reduction. Its main features are a straight crushing cavity, high output, a special water cooling structure design that can crush high-temperature materials, high …
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Experimental Study on Nonuniform Compaction and Re …
Abstract: The crushed coal gangue particles are widely used in solid backfilling. However, the nonuniform compaction and internal re-crushing behavior of crushed coal gangue …
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Comparative study on mechanical and environmental properties of coal
The coal gangue used in this study was sourced from the open-pit coal mine located in Fuxin City, Liaoning Province, China. Based on the standard of preparing structural concrete [16], the coal gangue with large size was crushed and sieved to obtain GS. Fig. 2 shows the granular distribution of the GS and NS as fine aggregates. From …
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Experimental study on the fractal characteristics of crushing coal …
In order to analyze crushing characteristics of coal and gangue and it's influence on separation effect, impact crushing experiments for coal and gangue were conducted. Crushing characteristics ...
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Using Chinese Coal Gangue as an Ecological Aggregate and …
After combustion, the physical properties of spontaneous combustion coal gangue are reduced to a certain extent, but the direct crushing of coal gangue into aggregate still meets the requirements of preparing C30 concrete. Coal gangue has a large number of active components and high crystallinity but does not show activity.
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Application of Coal Gangue as a Coarse Aggregate in Green …
2. Utilization of Coal Gangue. For years, researchers have been working on the effective utilization of the enormous stocked coal gangue. In China, more than a half of discharged coal gangue is used for land reclamation—one third of that is used for power generation and the rest is used for producing building materials [2,4].However, the main …
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Exploring calcined coal gangue fines as the total substitute …
1. Introduction. Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the production of 1 t coal generates 0.1–0.25 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3].The coal gangue not only occupies …
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Valorization of calcined coal gangue as coarse aggregate in …
Coal gangue is a by-product generated from coal mining and washing. Using coal gangue as aggregate is an effective approach of valorization this high-volume industrial waste, not only solving the environmental issue of accumulation but also reducing the mining of natural aggregate. ... Crushing index of CGA 750 is 6.0% lower than that …
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Study of the Internal Rebreaking Characteristics of Crushed Gangue …
Relatively early research was conducted on the connection between coal gangue compaction properties and particle size distribution by Jiang et al. and Ma et al. . Huang et ... According to fractal theory in gangue crushing, the total mass of the crushed gangue is set as M t, where the mass of particles smaller than the particle size di is M 1 ...
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Reutilisation of coal gangue and fly ash as underground …
Therefore, gangue with a particle size below 50 mm was selected for this test, and the particle size distribution of the coal gangue sample after crushing is shown in Fig. 3. To prepare the test samples, the gangue was crushed with a hammer down to 80 mm particles and then further crushed to 50 mm particles using a small crusher.
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Experimental Investigation of the Compaction-Crushing …
The compaction and re-crushing characteristics of quarry filling material are important factors which affect its filling effect and quality [1,2].As the gangue filling material is widely-sourced, economical, and inexpensive, mine-filling accounts for most of its use, and the gangue material as a filling body can account for a large amount of gangue, …
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Mechanical Properties of Furnace Slag and Coal Gangue …
The crushing treatment of the slag and coal gangue was minimized to the greatest extent possible. Finally, it was decided that the 0–4.75 mm coal gangue should be replaced with 0–4.75 mm slag. As shown in Figure 2 a, the natural particle size of the furnace slag was unevenly distributed and greatly varied.
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Study on the calorific value and cementitious properties of coal gangue …
By selecting coal gangue from four regions, crushing and sieving it, comparing the calorific values of 0–1 mm and 1–16 mm coal gangue particles, and then calcining the 0–1 mm coal gangue particles, the characteristics of coal gangue before and after calcination were analyzed. By substituting 30% of cement with 0–1 mm coal …
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Morphological characterization of crushed coal gangue …
Impact crushing is the primary fragmentation method of raw coal-gangue ores with advantages such as high crushing rate and low energy consumption. Raw coal-gangue ores can be crushed, separated, an...
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Low-carbon utilization of coal gangue under the carbon
The treatment and utilization of coal gangue, one of the main solid wastes produced during coal mining, are of great significance in environmental protection and resource development. In the contemporary context of the carbon neutralization strategy, due to the property of the carbon in coal gangue, it is necessary to be cautious of the …
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Study on the influence mechanism of activated coal gangue …
The characteristics of raw materials used in the test, such as cement, CGP and coal gangue, are shown in Table 1.In this experiment, the coal gangue produced by Zhang Jiamao coal mine in Shenmu City, Shaanxi Province is selected, and the XRD-7000L X-ray diffractometer was used to obtain the mineral composition analysis of coal …
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