摘要
采用数值模拟方法对将工作面瓦斯涌出位置设置为煤壁涌出及工作面涌出条件下的流场分布进行了研究,结果表明:在靠近采空区侧工作面沿程,将瓦斯涌出位置设置为煤壁涌出时的瓦斯浓度较工作面涌出时的小;在靠近煤壁侧的工作面沿程,将瓦斯涌出位置设置为煤壁涌出时的瓦斯浓度较工作面涌出时的大。将瓦斯涌出位置设置为煤壁涌出及工作面涌出条件下的采空区瓦斯分布、氧气分布及自燃带分布规律基本一致。如对工作面流场分布进行研究时,必须结合采煤工作面实际情况正确设置瓦斯涌出源位置,而如果研究对象为采空区流场分布时,为减少建模的复杂程度可将瓦斯涌出位置设置为工作面瓦斯涌出。
Numerical simulation method is adopted to study the flow field distribution under the condition that the gas emission location of the working face is set as the coal wall emission and the working face emission. The results show that: near the gob side along the working face, the gas concentration of setting the location of gas emission as coal wall is lower than that setting gas emission location as whole working face; but near the coal wall side along working face, the gas concentration of setting the position of gas emission as coal wall is bigger than that setting gas emission location as whole working face emission. The distribution of gas distribution, oxygen distribution and spontaneous combustion zone in goaf is basically consistent under conditions of different gas emission positions. For example, studying the flow field distribution of the working face, the gas emission source location must be set up correctly according to the actual situation of the coal mining working face; if the research object is flow field distribution of goaf, gas emission location can be set as gas emission of working face to reduce the complexity of modeling.
引文
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