小窑火区下煤层群多层采空区渗流数值模拟

Numerical Simulation on Seepage Flow in Multiplayer Gob Area of Coal Seam Group Under Small Mine Fire Zone

摘要: 通过对工作面采用均压通风开采时，小窑火区下煤层群多层采空区渗流数值模拟研究，求解了多层采空区渗流和扩散耦合的稳态数学模型，得到速度场和氧气、CO、CO₂气体组分浓度场分布，并划分了工作面采空区和上覆采空区自燃“三带”分布范围，经过与实际测定结果比较，模拟结果与实际符合度较好。
- 小窑火区 /
- 煤层群 /
- 均压通风 /
- 多层采空区 /
- 数值模拟
Abstract: Through numerical simulation study on the seepage flow in multilayer gob area of coal seam group when mining face adopted pressure balancing ventilation, we solved the steady-state mathematical model for seepage flow and diffusion coupling in multiplayer gob area, got the velocity field and oxygen, CO, CO₂ gas component concentration distribution, then divided spontaneous combustion "three zone" in mining face gob and overlying gob. After the comparison with the actual measurement results, the simulation results could meet the actual demand.
- small mine fire zone /
- coal seam group /
- pressure balancing ventilation /
- multilayer gob area /
- numerical simulation

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