| 回采面上隅角埋管抽放采空区瓦斯数值模拟 |
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| 引用本文： | 谢振华,张建业,孙凯.回采面上隅角埋管抽放采空区瓦斯数值模拟[J].应用基础与工程科学学报,2011(Z1):230-237. |
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| 作者姓名： | 谢振华 张建业 孙凯 |
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| 作者单位： | 北京科技大学土木与环境工程学院; |
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| 基金项目： | 教育部高等学校特色专业建设项目(安全工程)TS2053 |
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| 摘 要： | 针对中小型高瓦斯矿井的实际情况,采用数值模拟确定提高瓦斯抽放效率的方案.按照渗流力学的方法将采空区视为连续的渗流空间,采用GAMB IT建立采空区计算几何模型.确定了冒落带的孔隙率和黏性系数.采用FLUENT软件对采空区瓦斯涌出量及埋管抽放瓦斯进行数值模拟,得到了采空区沿工作面走向、倾向和竖向3个不同方向上瓦斯浓度的分布规律,以及埋管抽放采空区瓦斯的最佳参数.模拟结果表明,在抽放管路压力为-100Pa时,抽放管路内和上隅角瓦斯浓度随着抽放位置的变化呈现规律性.当抽放位置距底板垂高2m、沿倾斜方向距回风巷道1m、沿走向深入采空区4m时,瓦斯抽放效果最佳,上隅角瓦斯浓度降至1.1%.上隅角区域采取封堵措施后,上隅角瓦斯浓度降至0.7%.
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| 关 键 词： | 采空区 瓦斯抽放 数值模拟 上隅角 封堵措施 |
Numerical Simulation on Gas Drainage of Gob Area by Buried Pipe in Working Face Upper Corner |
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| XIE Zhenhua,ZHANG Jianye,SUN Kai.Numerical Simulation on Gas Drainage of Gob Area by Buried Pipe in Working Face Upper Corner[J].Journal of Basic Science and Engineering,2011(Z1):230-237. |
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| Authors: | XIE Zhenhua ZHANG Jianye SUN Kai |
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| Institution: | XIE Zhenhua,ZHANG Jianye,SUN Kai (School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China) |
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| Abstract: | According to the practical status of high gas mine for middle and small types,numerical simulation was adopted to determine the effective plan for gas drainage.Based on permeation fluid mechanics theory,the gob area was regarded as continuous permeation field.The geometry model of gob area was built by GAMBIT.The porosity and viscosity coefficient of caving zone was determined by experiment.Through numerical simulation for gas emission and drainage of gob area by FLUENT,the distribution laws of gas concentr... |
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| Keywords: | gob area gas drainage numerical simulation upper corner plugging measures |
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