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首页> 外文期刊>International Journal of Coal Preparation and Utilization >Experimental Study on Crushing Characteristic of Coal and Gangue under Impact Load
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Experimental Study on Crushing Characteristic of Coal and Gangue under Impact Load

机译：冲击载荷作用下煤and石的破碎特性试验研究

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摘要

In order to analyze crushing characteristics of coal and gangue and its influence on separation effect, impact crushing experiments for coal and gangue were conducted. Crushing characteristics of coal and gangue under impact load were expressed by crushing ratio and crushing probability. Experimental results showed that crushing ratios of coal and gangue decreased with an increase of particle size and impact velocity. As the impact velocity was between 5-8 m/s and the initial particle size was between 50-100 mm, the particle size of coal obtained after crushing was between 35 mm and 45 mm. Crushing probabilities of coal and gangue increased with the impact velocity, but it was far less than that of coal under the same conditions. The lost coal rate and the mixed gangue rate were used to represent the separation effect. When the impact velocity was 7.5 m/s, the lost coal rate and the mixed gangue rate for the Xiezhuang mine coal sample were 18.285% and 25.723%, respectively. The separation effect predicted by Back Propagation Artificial Neural Network (BP-ANN) showed that the lost coal rate and the mixed gangue rate for the Xiezhuang mine coal at an impact velocity of 8.5 m/s were 3.68% and 33.35%, respectively.
机译：为了分析煤and石的破碎特性及其对分离效果的影响，进行了煤and石的冲击破碎实验。用破碎比和破碎概率表示了冲击载荷作用下煤and石的破碎特性。实验结果表明，煤和石的破碎率随粒径和冲击速度的增加而降低。当冲击速度在5-8m / s之间并且初始粒度在50-100mm之间时，粉碎后获得的煤的粒度在35mm至45mm之间。煤和石的破碎概率随冲击速度的增加而增加，但远小于相同条件下的煤。煤损失率和煤石混合率用来代表分离效果。当冲击速度为7.5 m / s时，谢庄矿煤样品的失煤率和混合石率分别为18.285％和25.723％。反向传播人工神经网络（BP-ANN）预测的分离效果表明，在冲击速度为8.5 m / s的情况下，谢庄矿的失煤率和混合脉石率分别为3.68％和33.35％。

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