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202171 · The study concludes that the crushing work ratios of three intact coal samples vary from 294.3732 to 945.8048 J/m 2. For the real-life case, more than 2300 MJ of transport work is needed, and 10062.09, 7046.57 and 5895.47 m 3 of gas is required when the gas pressure is 1, 2 and 3 MPa, respectively.
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202271 · Zhang et al. [10] used the Particle Flow Code (PFC) software to simulate the re-crushing properties of crushed coal samples and discovered that the re-crushing rate of the model presented an S-type functional relationship as strain increased. Wang and Li [23] used the CT reconstruction method to quantitatively analyze the effect of internal ...
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202271 · A larger particle deforms more easily and results in more AE counts and energy under the same compression; 2) crushed coal exhibits layered re-crushing characteristics, i.e., particle re-crushing first occurs in the middle layer, and as stress increases, re-crushing shifts gradually to the upper and lower layers; 3) larger particles re …
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2014626 · In a coal handling system, crushing is limited to a top size of 6 or 4mm. The devices most commonly used for crushing are the rotary breaker, the roll crusher and the hammer mill. It is necessary to screen the coal before crushing, so that only oversized coal is fed to the crusher. This helps to reduce power consumption in the crusher ...
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2022810 · In this study formed coke was prepared using devolatilized coal at different temperature. The effect of use of this devolatilized coal was studied in terms of point crushing strength. In general ...
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2023111 · To explore the migration and crushing characteristics of the outburst coal, outburst simulation experiments under different gas pressures (0.3 MPa, 0.5 MPa, and 0.8 MPa) were carried out using ...
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199971 · Airborne coal dust is also explosive, given the right particle size, concentration, and ignition source. Bureau of Mines studies have shown that ignitable airborne coal dust concentrations start on the order of 50g/m3 (0.05 oz./ft3) [5,6]. The most explosive coal dust size in air is below 75 nm (—200 mesh) [5,6].
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2023101 · This also means that the confining pressure is a key factor that affects the properties of Tectonically Deformed Coal (TDC). The degree of crushing of specimens was analyzed by particle size distribution in previous studies [33], [34], but this method is inapplicable to bonded specimens. Moreover, in the crushing model of this study, new …
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20221226 · Rockburst is a sudden disastrous instability of coal mass that poses a serious threat to underground exploitation of coal resources; therefore, approaches of prediction and control methods are valuable for improving mining environments. The mechanical properties and bursting liability of coal with drying, under-saturated, and …
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201159 · Measurement of Crushing Strength of Coal Agglomerates. Abstract- The aim of this research is to produce coal agglomerates 15-27.51mm and to determine the crushing strength of the agglomerates for good handling of fine (coal-liquid mixture) to improve fugitive dust control, decrease in transportation losses, reduce risk of coal freezing, lower ...
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