采动影响下掘进巷道煤壁瓦斯涌出规律研究

Study on Gas Emission Laws of Excavation Roadway Coal Wall Under the Influence of Mining

摘要: 利用有限体积法对薄及中厚煤层中掘进煤巷煤壁瓦斯涌出规律进行了数值模拟，研究了掘进巷道煤壁煤体应力重新分布过程中煤体渗透率动态变化对煤壁煤体瓦斯压力分布和巷道瓦斯涌出状况的影响，研究结果表明，煤巷煤壁内煤体渗透率决定着煤体瓦斯压力分布与煤壁瓦斯涌出速率，研究掘进巷道煤壁暴露之后全过程瓦斯涌出速率时应当考虑煤体渗透率的动态变化过程。
- 数值模拟 /
- 煤体渗透率 /
- 瓦斯涌出速率 /
- 煤体瓦斯压力 /
- 全隐式离散格式
Abstract: The finite volume method is used to carry out numerical simulation for the gas emission laws of excavation roadway coal wall in thin and medium thick coal seam. It is studied that the influence of dynamic change of coal permeability on coal wall gas pressure distribution and gas emission rate in the process of stress redistribution of excavation roadway coal wall. The results show that the coal permeability in roadway coal wall determines the coal gas pressure distribution and gas emission rates, the dynamic change process of coal permeability should be considered to investigate gas emission rates in the whole process after the exposure of excavation roadway coal wall.
- numerical simulation /
- coal permeability /
- gas emission rate /
- coal gas pressure /
- fully implicit discrete format

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