“U+L”型通风条件下采场瓦斯分布规律研究

为了研究“U+L”型通风条件下采场瓦斯分布规律，采用理论分析和数值模拟相结合的方法，理论分析了工作面瓦斯赋存规律和多孔介质瓦斯运移模型基本方程，然后，采用Fluent数值模拟软件，模拟了“U+L”型通风方式下采空区瓦斯浓度分布、工作面瓦斯分布规律以及采空区风流场分布规律。研究得出，该通风方式下，能够稀释和疏散采空区瓦斯，同时也增大了回风巷排瓦斯的负担，应增加其他相关瓦斯抽采措施，确保矿井的安全开采。

Study on gas distribution law of stope under "U+L" ventilation conditions

In order to study the law of gas distribution in stope under the condition of "U+L" ventilation，the law of gas occurrence in working face and the basic equation of gas migration model in porous media were analyzed theoretically by combining theoretical analysis with numerical simulation.Then，the goaf under the "U+L" ventilation mode was simulated by using Fluent numerical simulation software to analyze gas concentration distribution，gas distribution law in working face and air flow field distribution law in goaf.It was concluded that under this ventilation mode，gas in goaf can be diluted and evacuated，and the burden of gas drainage in return air roadway was increased.Other relevant gas drainage measures should be added to ensure the safe mining of the mine.