| 块度对顶煤放出率影响的数值模拟分析 |
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| 引用本文： | 张勇,司艳龙,石亮.块度对顶煤放出率影响的数值模拟分析[J].采矿与安全工程学报,2011,28(2):247-251. |
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| 作者姓名： | 张勇 司艳龙 石亮 |
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| 作者单位： | 中国矿业大学资源与安全工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(50974123); 国家十一五科技支撑计划项目(2008BAB36B01) |
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| 摘 要： | 为了研究不同顶煤块度对顶煤放出率的影响,以及分析其影响因素,采用PFC2D模拟软件,对厚煤层综放开采散体顶煤在不同块度下的落放规律进行模拟,并应用散体介质力学理论进行分析,从而得出了顶煤块度与顶煤放出率之间的关系.研究结果表明:顶煤存在一个临界块度,当顶煤块度低于此值时,项煤放出率较高,而高于此值时,顶煤放出率则大大降...
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| 关 键 词： | 块度 放出率 PFC2D 散体 |
Numerical Simulation of the Effect of Particle Size on Coal Caving Ratio |
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| ZHANG Yong,SI Yan-long,SHI Liang.Numerical Simulation of the Effect of Particle Size on Coal Caving Ratio[J].Journal of Mining and Safety Engineering,2011,28(2):247-251. |
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| Authors: | ZHANG Yong SI Yan-long SHI Liang |
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| Affiliation: | ZHANG Yong,SI Yan-long,SHI Liang(School of Resources and Safety Engineering,China University of Ming & Technology,Beijing 100083,China) |
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| Abstract: | We study the effect of particle sizes on coal caving ratio and simulate the caving regularity of loose top-coal with different particle sizes using the PFC2D software and the mechanics of granular media.The result shows that there exists a critical value of the particle size of the top-coal.If this value is smaller than the critical one,the coal caving ratio is comparatively higher,otherwise,the coal caving ratio drops dramatically.The arch-forming of coal and gangue and their relative motion are main facto... |
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| Keywords: | particle size coal caving rate PFC2D discrete element |
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