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采用数值模拟的方法,揭示了高瓦斯矿井煤巷掘进采用的压入式与长压短抽式局部通风方式下瓦斯运移规律。并对模拟的结果进行分析比较,提出了采用巷道各断面瓦斯浓度的总体标准差作为评判瓦斯混合不均匀度指标的方法。
The numerical simulation method is used to reveal the gas migration laws of the coal mine tunneling in high gas coal mine under the conditions of pressure-in and long-pressure short-draft local ventilation. And the results of the simulation are analyzed and compared, and the overall standard deviation of the gas concentrations at each section of the roadway is proposed as a method for evaluating the gas mixture heterogeneity index.