| 综放采空区防灭火注氮数值模拟与参数确定 |
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| 引用本文： | 李宗翔.综放采空区防灭火注氮数值模拟与参数确定[J].中国安全科学学报,2003,13(5):53-57. |
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| 作者姓名： | 李宗翔 |
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| 作者单位： | 辽宁工程技术大学 |
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| 摘 要： | 用有限元数值方法 ,求解了综放开采采空区注氮情况下的漏风渗流方程和氧浓度渗流耗散方程 ;结合计算机图形技术 ,直观展示了注氮前后采空区流场、流态和氧浓度分布动态变化 ;模拟了在不同注氮量下注氮控制区边界的变化过程 ,得到控制区边界位置与注氮流量呈负指数关系 ;重点探讨了用数值模拟方法确定合理注氮参数 (注氮流量、注氮位置和注氮时间 )的新方法。
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| 关 键 词： | 注氮 采空区风流 氧分布 迎风有限元 |
| 修稿时间： | 2002年9月1日 |
Numerical Simulation and Parameter Determination of Nitrogen Injection Process in Fire Prevention and Extinguishing in Fully Mechanized Longwall Top-coal Goaf |
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| Li Zongxiang,Assoc. Prof..Numerical Simulation and Parameter Determination of Nitrogen Injection Process in Fire Prevention and Extinguishing in Fully Mechanized Longwall Top-coal Goaf[J].China Safety Science Journal,2003,13(5):53-57. |
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| Authors: | Li Zongxiang Assoc Prof |
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| Institution: | Liaoning Technical University |
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| Abstract: | The seepage equation of air movement and air seepage flow dissipation equation of oxygen consumption concentration change process in leakage air flow in goaf air flow field under the condition of nitrogen injection have been solved. The relationship between nitrogen injection parameters (nitrogen injection discharge, position and time) and the state of airflow field and oxygen concentration distribution in goaf has been analyzed in detail. A new method of computerized numerical simulation is presented to determine the parameters of nitrogen injection. |
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| Keywords: | Nitrogen injection for fire extinguish Air flow in goaf Distribution of oxygen Parameters of nitrogen injection Upwind finite element |
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