采空区自燃“三带”分布的数值模拟

Numerical Simulation of Spontaneous Combustion "Three Zones" Distribution in Goaf

摘要: 利用FLUENT软件模拟出采空区氧浓度场、速度场、瓦斯浓度场和压力场，通过模拟结果与现场实测数据进行比较，相应地调整模拟参数，使得最后模拟结果与现场实测数据吻合，得到最终的氧浓度场和速度场。最后采用双指标法（上限漏风风速和下限氧浓度）划分采空区“三带”，采空区最大自燃带宽度为41 m，最后计算得到工作面安全回采速度为1.7 m/d。
- 自燃"三带" /
- 双指标法 /
- FLUENT模拟 /
- 气体分布 /
- 采空区
Abstract: The paper uses FLUENT software to simulate the oxygen concentration field, velocity filed, the gas concentration field and pressure field in goaf. Through the comparison between simulation results and the field measured data, adjusting simulation parameters correspondingly, making final simulation results to consistent with field data, and the final oxygen concentration field and velocity filed are got. Finally, the goaf is divided into three zones with double index method (upper limit air leakage wind speed and lower limit oxygen concentration), the largest width of goaf spontaneous combustion zone is 41 m, and the calculated safety mining working face rate is 1.7 m/d.
- spontaneous combustion "three zones" /
- double-index method /
- FLUENT numerical simulation /
- gas distribution /
- goaf

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